commit 60527e935fd965802f7aedcd4978fb28d807e894
Author: Harmon <rs_bhm@163.com>
Date:   Tue Apr 28 10:44:45 2026 +0800

    Initial project implementation

diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
@@ -0,0 +1,23 @@
+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv
+
+# Local data sources and runtime state
+全国行政区.geojson
+.s1dl/
+.local-data/
+*.db
+*.sqlite
+*.sqlite3
+*.log
+downloads/
+data/
+orbits/
+projects/
diff --git a/.python-version b/.python-version
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+++ b/.python-version
@@ -0,0 +1 @@
+3.12
diff --git a/README.md b/README.md
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+++ b/README.md
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+# Sentinel Orbit Downloader
+
+一个本地可用的 Sentinel-1 数据与精密轨道下载工具，支持：
+
+- 按行政区和时间范围检索 Sentinel-1
+- 下载原始 Sentinel-1 产品
+- 下载匹配的精密轨道/恢复轨道 `.EOF`
+- 用 SQLite 管理项目、任务、场景和下载记录
+- 通过本地 Web 页面完成日常操作
+
+当前项目面向 Windows 本机使用场景，已经包含一键启动脚本。
+
+## 当前能力
+
+已实现：
+
+- 行政区 GeoJSON 导入 SQLite
+- 按行政区检索 Sentinel-1 场景
+- 原始 Sentinel-1 产品下载
+- 精密轨道 `.EOF` 下载
+- 项目管理
+- 任务列表、任务详情、事件日志
+- 任务删除与清空
+- Earthdata 凭据本地保存
+
+暂未实现：
+
+- GeoTIFF / `.tif` 处理与导出
+- 后处理流水线
+
+也就是说，现在项目专注于“检索 + 下载原始数据 + 下载轨道”。
+
+## 目录
+
+- 项目根目录：`C:\Users\16216\Desktop\Code\sentinel-orbit-downloader`
+- 默认数据库：`.s1dl\app.db`
+- 默认本地数据目录：`.local-data\`
+- 行政区源文件：`全国行政区.geojson`
+
+## 环境要求
+
+- Windows
+- Python 3.11 - 3.13
+- `uv`
+- 网络可访问 ASF / Earthdata
+
+## 快速开始
+
+### 1. 一键启动
+
+直接双击：
+
+- `Start-SentinelUI.cmd`
+
+它会自动：
+
+1. 检查 `uv`
+2. 执行 `uv sync`
+3. 启动本地服务
+4. 打开浏览器
+
+停止服务时双击：
+
+- `Stop-SentinelUI.cmd`
+
+启动脚本优先尝试这些端口：
+
+- `8011`
+- `8010`
+- `8012`
+- `8013`
+- `8014`
+
+如果端口已被占用，会自动换到下一个可用端口。
+
+### 2. 手动启动
+
+```powershell
+cd C:\Users\16216\Desktop\Code\sentinel-orbit-downloader
+uv sync
+$env:S1DL_API_PORT="8011"
+uv run s1-web
+```
+
+打开页面：
+
+```text
+http://127.0.0.1:8011/
+```
+
+Swagger 文档：
+
+```text
+http://127.0.0.1:8011/docs
+```
+
+## 首次使用流程
+
+### 1. 导入行政区
+
+项目根目录下已经放了：
+
+- `全国行政区.geojson`
+
+在页面中点击：
+
+- `导入行政区`
+
+也可以用命令行：
+
+```powershell
+uv run s1-dl regions import
+```
+
+### 2. 创建项目
+
+建议先建一个本地项目，例如：
+
+- 项目名称：`牡丹江 Sentinel-1 数据`
+- 数据根目录：`.local-data\mudanjiang`
+
+### 3. 配置 Earthdata
+
+下载原始 Sentinel-1 产品必须有 NASA Earthdata 账号。
+
+页面中可填写：
+
+- `Earthdata 用户名`
+- `Earthdata 密码`
+
+然后点击：
+
+- `保存凭据`
+
+保存后：
+
+- 用户名和密码会写入本地 SQLite
+- 密码不是明文保存
+- 密码使用当前 Windows 用户的 DPAPI 加密
+
+如果不想保存，也可以每次手填。
+
+### 4. Earthdata 首次授权 ASF
+
+很多第一次下载失败，不是用户名密码错，而是没有授权 ASF 应用访问 Earthdata。
+
+如果任务日志出现类似错误：
+
+```text
+Pre authorization required for this application
+```
+
+请先在浏览器登录 Earthdata，然后打开下面链接完成授权：
+
+```text
+https://urs.earthdata.nasa.gov/approve_app?client_id=BO_n7nTIlMljdvU6kRRB3g
+```
+
+这是一次性的关键步骤。
+
+### 5. 检索并下载
+
+页面典型流程：
+
+1. 搜索行政区，例如 `牡丹江`
+2. 选择时间范围
+3. 选择产品级别，如 `SLC`
+4. 点击 `发起检索`
+5. 选中任务
+6. 选择下载参数
+7. 点击 `启动下载`
+
+如果只想补精密轨道，不下载原始产品：
+
+- 把 `跳过产品` 设为 `是`
+
+## 页面功能说明
+
+### 环境配置
+
+- 导入行政区 GeoJSON
+- 查看服务状态
+
+### 项目
+
+- 创建项目
+- 刷新项目列表
+
+### 行政区选择
+
+- 按名称或 `adcode` 搜索
+- 查看行政区范围框和中心点
+
+### 检索参数
+
+支持：
+
+- 开始日期 / 结束日期
+- 产品级别
+- 波束模式
+- 轨道方向
+- 极化
+- 相对轨道号
+- 最大结果数
+- 使用原始行政区边界
+
+### 下载参数
+
+支持：
+
+- 数据目录
+- 轨道目录
+- 跳过产品
+- 跳过轨道
+- 并发数
+- 忽略轨道失败
+- Earthdata 凭据保存 / 清除
+
+### 任务区
+
+支持：
+
+- 刷新任务
+- 刷新详情
+- 删除选中任务
+- 清空当前项目的非运行任务
+
+## 输出结构
+
+典型输出目录如下：
+
+```text
+.local-data\mudanjiang\
+  data\        # Sentinel-1 原始产品
+  orbits\      # AUX_POEORB / AUX_RESORB EOF 文件
+  manifest.csv
+```
+
+数据库中还会保存：
+
+- 项目信息
+- 搜索任务
+- 场景清单
+- 下载记录
+- 任务事件日志
+
+## 命令行用法
+
+### 同步环境
+
+```powershell
+uv sync
+```
+
+### 导入行政区
+
+```powershell
+uv run s1-dl regions import
+```
+
+### 搜索行政区
+
+```powershell
+uv run s1-dl regions search 牡丹江
+```
+
+### 创建项目
+
+```powershell
+uv run s1-dl projects create `
+  --name "牡丹江 Sentinel-1 数据" `
+  --data-root ".local-data\mudanjiang" `
+  --description "Mudanjiang Sentinel-1 scenes and orbits"
+```
+
+### 按行政区检索
+
+牡丹江市 `adcode`：
+
+- `231000`
+
+```powershell
+uv run s1-dl search `
+  --project-id 1 `
+  --region-adcode 231000 `
+  --start 2024-01-01 `
+  --end 2024-03-01 `
+  --processing-level SLC `
+  --max-results 20 `
+  --manifest ".local-data\mudanjiang\manifest.csv"
+```
+
+### 直接下载
+
+```powershell
+uv run s1-dl download `
+  --project-id 1 `
+  --region-adcode 231000 `
+  --start 2024-01-01 `
+  --end 2024-03-01 `
+  --processing-level SLC `
+  --out ".local-data\mudanjiang-run" `
+  --processes 2
+```
+
+### 只补轨道
+
+```powershell
+uv run s1-dl orbits `
+  --data-dir ".local-data\mudanjiang\data" `
+  --out ".local-data\mudanjiang\orbits"
+```
+
+## 常见问题
+
+### 1. 页面里任务全是 failed
+
+先看任务事件日志。
+
+常见原因有两个：
+
+#### 原因 A：没填 Earthdata 用户名和密码
+
+如果下载原始 Sentinel-1 产品，必须提供 Earthdata 凭据。
+
+解决：
+
+- 页面填写用户名密码
+- 或保存到本地配置
+- 或设置环境变量 `EARTHDATA_USER` / `EARTHDATA_PASS`
+
+#### 原因 B：Earthdata 没授权 ASF
+
+如果日志里有：
+
+```text
+Pre authorization required for this application
+```
+
+按前文的授权链接先批准 ASF 应用。
+
+### 2. 为什么检索成功，但下载失败
+
+因为检索 ASF 元数据不一定要求完整的下载授权；真正下载原始产品时才会触发 Earthdata 登录和授权校验。
+
+### 3. 只想下载轨道，不想下载原始产品
+
+页面里把：
+
+- `跳过产品`
+
+设成：
+
+- `是`
+
+### 4. 保存 Earthdata 凭据是否明文
+
+不是。
+
+当前实现：
+
+- 用户名保存在本地 SQLite
+- 密码经过 Windows DPAPI 加密后保存
+
+### 5. 为什么不支持 `.tif`
+
+当前项目只管原始 Sentinel-1 产品和轨道文件。
+
+还没有做：
+
+- 解压
+- 预处理
+- GeoTIFF 导出
+
+## 开发与维护
+
+### 主要入口
+
+- Web API: `src/sentinel_orbit_downloader/api/app.py`
+- Web 页面: `src/sentinel_orbit_downloader/web/`
+- 下载管理: `src/sentinel_orbit_downloader/services/download_manager.py`
+- 项目/任务存储: `src/sentinel_orbit_downloader/services/project_store.py`
+- Earthdata 本地设置: `src/sentinel_orbit_downloader/services/settings_store.py`
+
+### 本地脚本
+
+- `Start-SentinelUI.cmd`
+- `Start-SentinelUI.ps1`
+- `Stop-SentinelUI.cmd`
+- `Stop-SentinelUI.ps1`
+
+## 说明
+
+这个项目当前阶段的目标很明确：
+
+- 把“按区域检索 Sentinel-1”
+- “下载原始数据”
+- “下载精密轨道”
+- “管理任务记录”
+
+这四件事先稳定做好。
diff --git a/Start-SentinelUI.cmd b/Start-SentinelUI.cmd
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--- /dev/null
+++ b/Start-SentinelUI.cmd
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+@echo off
+setlocal
+powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0Start-SentinelUI.ps1"
+if errorlevel 1 pause
+endlocal
diff --git a/Start-SentinelUI.ps1 b/Start-SentinelUI.ps1
new file mode 100644
index 0000000..f39c1b1
--- /dev/null
+++ b/Start-SentinelUI.ps1
@@ -0,0 +1,233 @@
+param(
+    [int[]]$PreferredPorts = @(8011, 8010, 8012, 8013, 8014),
+    [switch]$NoBrowser,
+    [switch]$ForceRestart
+)
+
+$ErrorActionPreference = "Stop"
+
+function Write-Info {
+    param([string]$Message)
+    Write-Host "[launcher] $Message"
+}
+
+function Get-UvPath {
+    $command = Get-Command uv -ErrorAction SilentlyContinue
+    if ($command -and $command.Source) {
+        return $command.Source
+    }
+
+    $fallback = Join-Path $HOME ".local\bin\uv.exe"
+    if (Test-Path -LiteralPath $fallback) {
+        return $fallback
+    }
+
+    throw "uv.exe was not found. Install uv first or add it to PATH."
+}
+
+function Test-Health {
+    param([int]$Port)
+
+    try {
+        $null = Invoke-RestMethod -Uri "http://127.0.0.1:$Port/api/health" -TimeoutSec 2
+        return $true
+    } catch {
+        return $false
+    }
+}
+
+function Get-FreePort {
+    param([int[]]$Candidates)
+
+    foreach ($port in $Candidates) {
+        $listener = $null
+        try {
+            $listener = [System.Net.Sockets.TcpListener]::new([System.Net.IPAddress]::Loopback, $port)
+            $listener.Start()
+            return $port
+        } catch {
+            continue
+        } finally {
+            if ($listener) {
+                $listener.Stop()
+            }
+        }
+    }
+
+    throw "No free port was found in: $($Candidates -join ', ')"
+}
+
+function Get-RunningProcess {
+    param([int]$Id)
+
+    if ($Id -le 0) {
+        return $null
+    }
+
+    try {
+        return Get-Process -Id $Id -ErrorAction Stop
+    } catch {
+        return $null
+    }
+}
+
+function Load-State {
+    param([string]$Path)
+
+    if (-not (Test-Path -LiteralPath $Path)) {
+        return $null
+    }
+
+    try {
+        return Get-Content -LiteralPath $Path -Raw | ConvertFrom-Json
+    } catch {
+        return $null
+    }
+}
+
+function Save-State {
+    param(
+        [string]$Path,
+        [int]$ProcessId,
+        [int]$Port,
+        [string]$Url
+    )
+
+    $payload = [ordered]@{
+        pid        = $ProcessId
+        port       = $Port
+        url        = $Url
+        started_at = (Get-Date).ToString("s")
+    }
+
+    $payload | ConvertTo-Json | Set-Content -LiteralPath $Path -Encoding UTF8
+}
+
+function Remove-State {
+    param([string]$Path)
+
+    if (Test-Path -LiteralPath $Path) {
+        Remove-Item -LiteralPath $Path -Force
+    }
+}
+
+$projectRoot = Split-Path -Parent $PSCommandPath
+$runtimeDir = Join-Path $projectRoot ".s1dl"
+$statePath = Join-Path $runtimeDir "web-ui-state.json"
+$stdoutPath = Join-Path $runtimeDir "web-ui.stdout.log"
+$stderrPath = Join-Path $runtimeDir "web-ui.stderr.log"
+
+New-Item -ItemType Directory -Path $runtimeDir -Force | Out-Null
+
+$state = Load-State -Path $statePath
+
+if ($state -and -not $ForceRestart) {
+    $existingProcess = Get-RunningProcess -Id ([int]$state.pid)
+    if ($existingProcess -and (Test-Health -Port ([int]$state.port))) {
+        $existingUrl = "http://127.0.0.1:$($state.port)/"
+        Write-Info "UI is already running at $existingUrl"
+        if (-not $NoBrowser) {
+            Start-Process $existingUrl | Out-Null
+        }
+        exit 0
+    }
+}
+
+foreach ($port in $PreferredPorts) {
+    if (Test-Health -Port $port) {
+        $url = "http://127.0.0.1:$port/"
+        Write-Info "Found an existing running UI at $url"
+        Save-State -Path $statePath -ProcessId 0 -Port $port -Url $url
+        if (-not $NoBrowser) {
+            Start-Process $url | Out-Null
+        }
+        exit 0
+    }
+}
+
+if ($ForceRestart -and $state) {
+    $oldProcess = Get-RunningProcess -Id ([int]$state.pid)
+    if ($oldProcess) {
+        Write-Info "Stopping previous tracked process $($oldProcess.Id)"
+        Stop-Process -Id $oldProcess.Id -Force
+        Start-Sleep -Seconds 1
+    }
+    Remove-State -Path $statePath
+}
+
+$uvPath = Get-UvPath
+Write-Info "Using uv at $uvPath"
+Write-Info "Syncing project environment"
+& $uvPath sync --directory $projectRoot
+if ($LASTEXITCODE -ne 0) {
+    throw "uv sync failed with exit code $LASTEXITCODE"
+}
+
+$pythonPath = Join-Path $projectRoot ".venv\Scripts\python.exe"
+if (-not (Test-Path -LiteralPath $pythonPath)) {
+    throw "Python executable was not found at $pythonPath"
+}
+
+$portToUse = Get-FreePort -Candidates $PreferredPorts
+$url = "http://127.0.0.1:$portToUse/"
+
+if (Test-Path -LiteralPath $stdoutPath) {
+    Remove-Item -LiteralPath $stdoutPath -Force
+}
+if (Test-Path -LiteralPath $stderrPath) {
+    Remove-Item -LiteralPath $stderrPath -Force
+}
+
+$arguments = @(
+    "-m",
+    "uvicorn",
+    "sentinel_orbit_downloader.api.app:app",
+    "--host",
+    "127.0.0.1",
+    "--port",
+    "$portToUse"
+)
+
+Write-Info "Starting UI at $url"
+$process = Start-Process `
+    -FilePath $pythonPath `
+    -ArgumentList $arguments `
+    -WorkingDirectory $projectRoot `
+    -WindowStyle Hidden `
+    -RedirectStandardOutput $stdoutPath `
+    -RedirectStandardError $stderrPath `
+    -PassThru
+
+$started = $false
+for ($i = 0; $i -lt 30; $i++) {
+    Start-Sleep -Seconds 1
+    if (Test-Health -Port $portToUse) {
+        $started = $true
+        break
+    }
+}
+
+if (-not $started) {
+    $running = Get-RunningProcess -Id $process.Id
+    if ($running) {
+        Stop-Process -Id $running.Id -Force
+    }
+
+    $stderrTail = ""
+    if (Test-Path -LiteralPath $stderrPath) {
+        $stderrTail = (Get-Content -LiteralPath $stderrPath -Tail 20) -join [Environment]::NewLine
+    }
+
+    if ($stderrTail) {
+        throw "UI failed to start.`n$stderrTail"
+    }
+
+    throw "UI failed to start."
+}
+
+Save-State -Path $statePath -ProcessId $process.Id -Port $portToUse -Url $url
+Write-Info "UI is ready: $url"
+
+if (-not $NoBrowser) {
+    Start-Process $url | Out-Null
+}
diff --git a/Stop-SentinelUI.cmd b/Stop-SentinelUI.cmd
new file mode 100644
index 0000000..905591d
--- /dev/null
+++ b/Stop-SentinelUI.cmd
@@ -0,0 +1,5 @@
+@echo off
+setlocal
+powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0Stop-SentinelUI.ps1"
+if errorlevel 1 pause
+endlocal
diff --git a/Stop-SentinelUI.ps1 b/Stop-SentinelUI.ps1
new file mode 100644
index 0000000..b2a845b
--- /dev/null
+++ b/Stop-SentinelUI.ps1
@@ -0,0 +1,43 @@
+param()
+
+$ErrorActionPreference = "Stop"
+
+function Write-Info {
+    param([string]$Message)
+    Write-Host "[launcher] $Message"
+}
+
+function Get-RunningProcess {
+    param([int]$Id)
+
+    if ($Id -le 0) {
+        return $null
+    }
+
+    try {
+        return Get-Process -Id $Id -ErrorAction Stop
+    } catch {
+        return $null
+    }
+}
+
+$projectRoot = Split-Path -Parent $PSCommandPath
+$statePath = Join-Path $projectRoot ".s1dl\web-ui-state.json"
+
+if (-not (Test-Path -LiteralPath $statePath)) {
+    Write-Info "No tracked UI process was found."
+    exit 0
+}
+
+$state = Get-Content -LiteralPath $statePath -Raw | ConvertFrom-Json
+$process = Get-RunningProcess -Id ([int]$state.pid)
+
+if ($process) {
+    Write-Info "Stopping UI process $($process.Id)"
+    Stop-Process -Id $process.Id -Force
+} else {
+    Write-Info "Tracked process is not running."
+}
+
+Remove-Item -LiteralPath $statePath -Force
+Write-Info "Done."
diff --git a/docs/PROJECT_DESIGN.md b/docs/PROJECT_DESIGN.md
new file mode 100644
index 0000000..17a74ac
--- /dev/null
+++ b/docs/PROJECT_DESIGN.md
@@ -0,0 +1,818 @@
+# Sentinel 数据与精密轨道下载管理系统设计
+
+## 目标
+
+把当前命令行下载器扩展成一个本地化的 Sentinel-1 数据管理系统。系统需要支持按行政区、手绘范围、bbox、GeoJSON/WKT 查询影像，选择下载任务，自动下载 Sentinel-1 数据和对应精密轨道文件，并长期管理任务、文件、状态和日志。
+
+第一阶段重点服务 Sentinel-1 SLC/GRD 数据和 `AUX_POEORB` 精密轨道；后续架构保留接入 Sentinel-2/3、Copernicus Data Space、批量处理流程的空间。
+
+## 当前基础
+
+已有能力：
+
+- `s1-dl search`：通过 ASF Search 按 AOI 和时间查询 Sentinel-1。
+- `s1-dl download`：查询后下载 Sentinel-1 产品，并下载匹配轨道。
+- `s1-dl orbits`：为已有场景名、`.zip`、`.SAFE` 补下载轨道。
+- Python 环境由 `uv` 管理。
+
+项目下已有 `全国行政区.geojson`：
+
+- 文件大小约 53MB。
+- 顶层类型为 `FeatureCollection`。
+- 要素数：477。
+- 常见属性：`adcode`、`name`、`center`、`centroid`、`childrenNum`、`level`、`parent`、`acroutes`、`treeID`。
+- `level` 分布：多数为 `city`，少量 `district`，省级要素不完整。
+- 牡丹江市要素：`adcode=231000`、`name=牡丹江市`、`level=city`、`parent.adcode=230000`。
+- 牡丹江市边界范围：`128.232144,43.425798,131.310629,45.9875`。
+
+设计结论：不能每次页面加载都直接解析 53MB GeoJSON。应在首次启动或数据更新时导入 SQLite，建立行政区索引、bbox、简化 WKT，并用内置省份 adcode 表补齐省级树。
+
+## 产品形态
+
+推荐形态：本地 Web 管理器 + 保留 CLI。
+
+```text
+浏览器页面
+  区域选择、地图查看、查询条件、结果表格、任务监控
+
+FastAPI 后端
+  行政区查询、ASF 查询、下载任务、轨道匹配、文件管理
+
+SQLite 数据库
+  项目、AOI、搜索任务、场景、下载记录、日志、设置
+
+文件仓库
+  Sentinel-1 zip、轨道 EOF、manifest、任务日志
+
+CLI
+  保留自动化和批处理入口，复用后端 service 层
+```
+
+前端建议使用 Vite + React + TypeScript + Leaflet/MapLibre；后端使用 FastAPI + SQLAlchemy/SQLModel + SQLite。这样后端仍是 Python，能复用现有 ASF 和轨道下载逻辑；前端只负责交互和展示。
+
+如果要先快速交付，也可以用 Streamlit 做 MVP。但作为长期项目，FastAPI + 独立前端更适合任务状态、日志、地图交互和后续扩展。
+
+## 核心流程
+
+### 1. 首次启动
+
+1. 检查 `app.db` 是否存在。
+2. 检查行政区索引版本。
+3. 如果未导入，读取 `全国行政区.geojson`。
+4. 为每个要素计算：
+   - 原始 GeoJSON 几何。
+   - bbox。
+   - 中心点。
+   - 原始 WKT。
+   - 查询用简化 WKT。
+   - 几何 hash。
+5. 根据 `parent.adcode` 和内置省份表生成省-市-区县树。
+6. 写入 `regions` 表。
+
+### 2. 创建项目
+
+用户创建一个项目，例如：
+
+```text
+项目名：牡丹江积雪/形变数据
+数据根目录：D:\Sentinel\Mudanjiang
+默认产品：SLC
+默认波束：IW
+默认下载并发：4
+```
+
+项目用于隔离任务、下载目录和 manifest。
+
+### 3. 选择 AOI
+
+支持四种来源：
+
+- 行政区：省/市/区县选择，例如 `黑龙江省 -> 牡丹江市`。
+- bbox：输入 `min_lon,min_lat,max_lon,max_lat`。
+- 上传文件：GeoJSON/WKT。
+- 地图绘制：画矩形或多边形。
+
+对于行政区 AOI，系统默认使用行政区边界的简化 WKT 查询 ASF。页面允许切换：
+
+- 精确边界：减少周边误匹配，但 WKT 更长。
+- 简化边界：默认推荐。
+- bbox：速度快，但会包含边界外数据。
+
+### 4. 查询 Sentinel-1
+
+用户设置：
+
+- 时间范围。
+- 产品级别：`SLC`、`GRD_HD`、`GRD_MD`、`OCN`。
+- 波束：默认 `IW`。
+- 升降轨：`ASCENDING` / `DESCENDING` / 不限。
+- 极化：`VV`、`VH`、`VV+VH` 等。
+- 相对轨道号：可选。
+- 最大结果数。
+
+后端调用 ASF Search，结果写入：
+
+- `search_jobs`
+- `scenes`
+- `job_scenes`
+
+前端展示可筛选表格：
+
+- 场景名。
+- 开始/结束时间。
+- 卫星：S1A/S1B/S1C/S1D。
+- 产品级别。
+- 升降轨。
+- 相对轨道。
+- 极化。
+- 文件大小。
+- 是否已有本地产品。
+- 是否已有轨道。
+
+### 5. 创建下载任务
+
+用户勾选场景后创建下载任务。任务分三段：
+
+1. 产品下载。
+2. 轨道下载。
+3. 文件核查和状态归档。
+
+下载任务需要支持：
+
+- 暂停。
+- 取消。
+- 失败重试。
+- 跳过已存在文件。
+- 单独补轨道。
+- 只查询不下载。
+- 只下载轨道。
+
+### 6. 下载数据
+
+产品下载通过 ASF Session 使用 NASA Earthdata 账号。账号密码不写入数据库明文，优先使用：
+
+- 环境变量：`EARTHDATA_USER`、`EARTHDATA_PASS`。
+- Windows Credential Manager/keyring。
+- 页面临时输入，只保存在内存 session。
+
+下载目录按项目和任务组织：
+
+```text
+<data_root>\
+  projects\
+    <project_slug>\
+      jobs\
+        <job_id>_<area>_<start>_<end>\
+          data\
+            S1A_....zip
+          orbits\
+            S1A_OPER_AUX_POEORB_....EOF
+          manifest.csv
+          manifest.json
+          logs\
+            job.log
+```
+
+同一个场景如果已在仓库里存在，系统通过 `scene_id` 和文件路径复用，不重复下载。
+
+### 7. 下载精密轨道
+
+轨道不是按位置查询，而是按 Sentinel-1 场景名匹配：
+
+```text
+场景名 -> 卫星平台 + 成像时间 -> AUX_POEORB EOF
+```
+
+系统行为：
+
+- 默认优先 `AUX_POEORB`。
+- 如果精密轨道暂不可用，可允许回退 `AUX_RESORB`，并在 UI 中明确标记。
+- 轨道下载失败不应阻断已下载产品，但任务状态应显示 `产品完成 / 轨道失败`。
+- 支持后续“一键补齐精密轨道”。
+
+## 系统架构
+
+### 后端模块
+
+建议目录：
+
+```text
+src/sentinel_orbit_downloader/
+  api/
+    app.py                 # FastAPI app
+    routes_regions.py
+    routes_projects.py
+    routes_search.py
+    routes_downloads.py
+    schemas.py             # API DTO
+  core/
+    config.py              # 路径、并发、凭据配置
+    paths.py               # 文件目录规范
+    logging.py
+  domain/
+    enums.py
+    models.py              # 领域对象，不绑定数据库
+  services/
+    region_catalog.py      # 行政区导入和查询
+    aoi.py                 # AOI 转换、简化、bbox
+    asf_client.py          # ASF 查询和下载适配
+    orbit_client.py        # s1-orbits 适配
+    download_manager.py    # 下载编排
+    job_runner.py          # 后台任务执行
+    inventory.py           # 本地文件扫描和去重
+  storage/
+    db.py
+    orm.py
+    repositories.py
+    migrations/
+  cli.py                   # 继续保留 CLI，调用 services
+```
+
+前端建议目录：
+
+```text
+frontend/
+  package.json
+  src/
+    api/
+    components/
+    pages/
+    styles/
+```
+
+### 数据库模型
+
+#### settings
+
+保存本地配置。
+
+| 字段 | 说明 |
+| --- | --- |
+| key | 配置名 |
+| value | 配置值 |
+| updated_at | 更新时间 |
+
+#### regions
+
+行政区索引。
+
+| 字段 | 说明 |
+| --- | --- |
+| adcode | 行政区代码 |
+| name | 名称 |
+| level | `country/province/city/district/custom` |
+| parent_adcode | 父级代码 |
+| province_adcode | 省级代码 |
+| center_lon/center_lat | 中心点 |
+| min_lon/min_lat/max_lon/max_lat | bbox |
+| geometry_json | 原始几何 |
+| wkt | 原始 WKT |
+| simplified_wkt | ASF 查询用简化 WKT |
+| geometry_hash | 几何 hash |
+
+#### projects
+
+用户项目。
+
+| 字段 | 说明 |
+| --- | --- |
+| id | 项目 ID |
+| name | 项目名 |
+| slug | 目录友好名称 |
+| data_root | 数据根目录 |
+| description | 说明 |
+| created_at/updated_at | 时间 |
+
+#### aois
+
+项目 AOI。
+
+| 字段 | 说明 |
+| --- | --- |
+| id | AOI ID |
+| project_id | 项目 ID |
+| name | AOI 名称 |
+| source_type | `region/bbox/upload/drawn` |
+| region_adcode | 可选行政区代码 |
+| wkt | 查询 WKT |
+| bbox | bbox |
+| geometry_json | 几何 |
+| simplification_tolerance | 简化参数 |
+
+#### search_jobs
+
+一次查询任务。
+
+| 字段 | 说明 |
+| --- | --- |
+| id | 查询 ID |
+| project_id | 项目 ID |
+| aoi_id | AOI ID |
+| start_time/end_time | 查询时间范围 |
+| processing_level | 产品级别 |
+| beam_mode | 波束 |
+| flight_direction | 升降轨 |
+| polarization | 极化 |
+| relative_orbit | 相对轨道 |
+| max_results | 最大结果 |
+| status | `pending/running/succeeded/failed/canceled` |
+| result_count | 结果数 |
+| error_message | 错误 |
+| created_at/finished_at | 时间 |
+
+#### scenes
+
+ASF 场景主表。
+
+| 字段 | 说明 |
+| --- | --- |
+| scene_id | Sentinel-1 场景名 |
+| platform | S1A/S1B/S1C/S1D |
+| start_time/stop_time | 成像时间 |
+| processing_level | 产品级别 |
+| beam_mode | 波束 |
+| flight_direction | 升降轨 |
+| polarization | 极化 |
+| relative_orbit | 相对轨道 |
+| size_bytes | 文件大小 |
+| download_url | ASF 下载 URL |
+| geometry_json | 场景 footprint |
+| properties_json | ASF 原始属性 |
+
+#### job_scenes
+
+查询任务和场景的关系。
+
+| 字段 | 说明 |
+| --- | --- |
+| job_id | 查询 ID |
+| scene_id | 场景 ID |
+| selected | 用户是否选择下载 |
+| product_status | 产品下载状态 |
+| orbit_status | 轨道下载状态 |
+| product_path | 本地产品路径 |
+| orbit_path | 本地轨道路径 |
+
+#### downloads
+
+下载记录。
+
+| 字段 | 说明 |
+| --- | --- |
+| id | 下载 ID |
+| job_id | 任务 ID |
+| scene_id | 场景 ID |
+| kind | `product/orbit` |
+| status | `queued/running/succeeded/failed/skipped/canceled` |
+| url | 下载 URL |
+| path | 本地路径 |
+| bytes_total/bytes_done | 进度 |
+| attempt_count | 尝试次数 |
+| error_message | 错误 |
+| started_at/finished_at | 时间 |
+
+#### job_events
+
+任务日志。
+
+| 字段 | 说明 |
+| --- | --- |
+| id | 日志 ID |
+| job_id | 任务 ID |
+| level | `info/warning/error` |
+| message | 日志内容 |
+| created_at | 时间 |
+
+## API 设计
+
+### 行政区
+
+```text
+GET  /api/regions/tree
+GET  /api/regions/search?q=牡丹江
+GET  /api/regions/{adcode}
+GET  /api/regions/{adcode}/geometry?simplified=true
+POST /api/regions/reindex
+```
+
+### 项目和 AOI
+
+```text
+GET  /api/projects
+POST /api/projects
+GET  /api/projects/{id}
+PATCH /api/projects/{id}
+DELETE /api/projects/{id}
+
+GET  /api/projects/{id}/aois
+POST /api/projects/{id}/aois
+```
+
+### 查询
+
+```text
+POST /api/search-jobs
+GET  /api/search-jobs/{id}
+GET  /api/search-jobs/{id}/scenes
+POST /api/search-jobs/{id}/select-scenes
+```
+
+### 下载
+
+```text
+POST /api/download-jobs
+GET  /api/download-jobs/{id}
+GET  /api/download-jobs/{id}/events
+POST /api/download-jobs/{id}/pause
+POST /api/download-jobs/{id}/resume
+POST /api/download-jobs/{id}/cancel
+POST /api/download-jobs/{id}/retry
+POST /api/scenes/{scene_id}/download-orbit
+```
+
+### 系统状态
+
+```text
+GET /api/health
+GET /api/settings
+PUT /api/settings
+GET /api/inventory/scan
+```
+
+## 前端页面设计
+
+### 页面 1：首页 / 仪表盘
+
+显示：
+
+- 项目列表。
+- 最近查询任务。
+- 最近下载任务。
+- 下载成功/失败数量。
+- 数据目录占用。
+- 凭据状态和 ASF 连通性。
+
+### 页面 2：项目详情
+
+显示：
+
+- 项目信息。
+- AOI 列表。
+- 历史任务。
+- 本地数据清单。
+- 一键新建查询。
+
+### 页面 3：新建查询
+
+布局：
+
+```text
+左侧：区域选择和查询参数
+右侧：地图
+底部：查询按钮和参数摘要
+```
+
+区域选择：
+
+- 省份下拉。
+- 城市下拉。
+- 搜索框：输入 `牡丹江` 可以直接定位。
+- 上传 GeoJSON。
+- bbox 输入。
+- 地图绘制。
+
+查询参数：
+
+- 时间范围。
+- 产品类型。
+- 波束。
+- 升降轨。
+- 极化。
+- 相对轨道。
+- 最大结果数。
+
+### 页面 4：查询结果
+
+功能：
+
+- 表格排序、筛选、勾选。
+- 地图显示选中场景 footprint。
+- 显示本地文件存在状态。
+- 下载选中产品。
+- 只下载轨道。
+- 导出 manifest。
+
+### 页面 5：下载任务
+
+功能：
+
+- 进度条。
+- 当前下载文件。
+- 产品状态。
+- 轨道状态。
+- 失败原因。
+- 暂停/取消/重试。
+- 打开本地目录。
+
+### 页面 6：数据仓库
+
+功能：
+
+- 按项目、区域、时间、产品类型筛选本地数据。
+- 查看每景产品和轨道是否匹配。
+- 补下载缺失轨道。
+- 删除任务记录但保留文件。
+- 扫描外部已有数据入库。
+
+## 文件和命名规范
+
+项目目录：
+
+```text
+<data_root>\
+  app.db
+  app.log
+  regions\
+    regions_index_version.json
+  projects\
+    <project_slug>\
+      project.json
+      aois\
+      jobs\
+        <job_id>_<area_slug>_<date_range>\
+          data\
+          orbits\
+          manifests\
+          logs\
+```
+
+任务目录名示例：
+
+```text
+000001_mudanjiang_20240101_20240301_s1_slc
+```
+
+manifest：
+
+- `manifest.csv`：给用户打开查看。
+- `manifest.json`：完整机器可读版本。
+
+## 状态机
+
+查询任务：
+
+```text
+pending -> running -> succeeded
+                   -> failed
+                   -> canceled
+```
+
+下载任务：
+
+```text
+queued -> running -> succeeded
+                 -> partial_failed
+                 -> failed
+                 -> paused
+                 -> canceled
+```
+
+单文件下载：
+
+```text
+queued -> running -> succeeded
+                 -> skipped
+                 -> failed
+                 -> canceled
+```
+
+产品和轨道状态分开记录。一个任务可以是：
+
+```text
+产品全部成功，轨道部分失败
+```
+
+这种情况应显示为 `partial_failed`，并允许单独补轨道。
+
+## 关键工程决策
+
+### 行政区边界处理
+
+`全国行政区.geojson` 不作为运行时主数据源，而是导入源。导入后使用 SQLite 查询。
+
+对于 ASF 查询，默认使用 `simplified_wkt`。原因：
+
+- 原始边界可能很长。
+- ASF 对复杂 WKT 查询更慢。
+- Sentinel-1 景幅较大，过细边界通常没有必要。
+
+简化参数建议：
+
+- 默认 tolerance：`0.01` 度。
+- 牡丹江市原始 WKT 约 10755 字符，`0.01` 简化后约 5694 字符。
+- 用户可在高级设置中切换为原始边界或 bbox。
+
+### 下载幂等
+
+任何下载开始前先检查：
+
+- 数据库中是否已有该 `scene_id`。
+- 本地目标文件是否存在。
+- 文件大小是否合理。
+- 已有轨道是否覆盖该场景时间。
+
+存在则标记 `skipped`，避免重复下载。
+
+### 凭据
+
+不把 Earthdata 密码明文写入 SQLite。
+
+第一版：
+
+- 支持环境变量。
+- 支持页面临时输入。
+
+第二版：
+
+- 接入 `keyring`，在 Windows 上使用凭据管理器。
+
+### 后台任务
+
+本地单用户应用可以先用进程内任务队列：
+
+- `asyncio.Queue` 或 `ThreadPoolExecutor`。
+- 下载任务串行调度，单任务内部并发下载。
+- 任务状态写 SQLite。
+
+以后如果需要更强任务管理，再接入 RQ/Celery，但第一版不需要。
+
+## 实现阶段
+
+### 阶段 1：服务层重构
+
+目标：把现有 CLI 逻辑拆成可复用 service。
+
+任务：
+
+- 新增 `services/asf_client.py`。
+- 新增 `services/orbit_client.py`。
+- 新增 `services/aoi.py`。
+- CLI 改为调用 service。
+- 保持现有 CLI 行为不变。
+- 增加基础单元测试。
+
+验收：
+
+- `uv run s1-dl search` 仍可用。
+- `uv run s1-dl download` 仍可用。
+- `uv run s1-dl orbits` 仍可用。
+
+### 阶段 2：行政区索引
+
+目标：支持从 `全国行政区.geojson` 快速检索牡丹江等行政区。
+
+任务：
+
+- 新增 SQLite。
+- 新增 `regions` 表。
+- 新增导入命令：`s1-dl regions import 全国行政区.geojson`。
+- 新增搜索命令：`s1-dl regions search 牡丹江`。
+- 新增导出 AOI 命令：`s1-dl regions export 231000 --format wkt`。
+
+验收：
+
+- 能查到 `牡丹江市 adcode=231000`。
+- 能用 `231000` 直接发起查询。
+
+### 阶段 3：项目和任务数据库
+
+目标：所有查询和下载有记录可追踪。
+
+任务：
+
+- 新增 `projects`、`aois`、`search_jobs`、`scenes`、`job_scenes`、`downloads`、`job_events`。
+- 查询结果入库。
+- 下载结果入库。
+- 生成规范目录和 manifest。
+
+验收：
+
+- 查询牡丹江后，数据库可看到任务和场景。
+- 下载后，数据库记录产品和轨道路径。
+
+### 阶段 4：FastAPI 后端
+
+目标：提供本地 Web API。
+
+任务：
+
+- 新增 `api/app.py`。
+- 实现行政区、项目、查询、下载接口。
+- 提供 Swagger 文档。
+- 提供 `uv run s1-web` 启动命令。
+
+验收：
+
+- `http://127.0.0.1:8000/docs` 可访问。
+- API 能返回牡丹江边界和查询结果。
+
+### 阶段 5：前端 MVP
+
+目标：页面完成主要流程。
+
+任务：
+
+- 项目列表。
+- 行政区选择。
+- 地图显示边界。
+- 查询表单。
+- 查询结果表格。
+- 创建下载任务。
+- 下载任务进度页。
+
+验收：
+
+- 用户能在页面选择 `黑龙江省 -> 牡丹江市`。
+- 设置时间范围。
+- 查询 Sentinel-1。
+- 勾选场景并下载数据和轨道。
+
+### 阶段 6：管理和增强
+
+目标：长期可用。
+
+任务：
+
+- 文件仓库扫描。
+- 缺失轨道补齐。
+- 失败重试。
+- 任务日志查看。
+- keyring 凭据管理。
+- 导出任务报告。
+- 支持 Copernicus Data Space 作为备用数据源。
+
+## 牡丹江市示例流程
+
+1. 用户打开本地页面。
+2. 进入项目 `牡丹江 Sentinel-1 数据`。
+3. 选择行政区：
+
+```text
+黑龙江省 -> 牡丹江市
+```
+
+4. 设置：
+
+```text
+时间：2024-01-01 至 2024-03-01
+产品：SLC
+波束：IW
+升降轨：不限
+极化：不限
+```
+
+5. 点击查询。
+6. 页面展示 ASF 返回的 Sentinel-1 场景。
+7. 用户勾选需要的场景。
+8. 点击下载。
+9. 系统下载：
+
+```text
+data\S1A_....zip
+orbits\S1A_OPER_AUX_POEORB_....EOF
+manifest.csv
+```
+
+10. 下载任务页显示每景产品和轨道状态。
+11. 如果某景轨道失败，用户点击“补轨道”。
+
+## 风险和处理
+
+### ASF 下载需要 Earthdata 账号
+
+处理：页面启动时做凭据检查，查询可以不登录，下载时必须登录。
+
+### 精密轨道可能有延迟
+
+处理：允许暂时使用 `AUX_RESORB`，并提供后续补 `AUX_POEORB`。
+
+### 行政区 GeoJSON 层级不完整
+
+处理：用 `parent.adcode` 和内置省级 adcode 表补层级，不依赖文件里存在完整省级 Feature。
+
+### 大范围长时间查询结果过多
+
+处理：限制最大结果数，页面提醒分批查询；任务层支持按月份自动拆分。
+
+### 文件重复和路径混乱
+
+处理：以 `scene_id` 为唯一键，所有任务引用同一场景，文件仓库扫描可修复数据库状态。
+
+## 后续扩展
+
+- Sentinel-2 数据下载。
+- Copernicus Data Space 数据源。
+- 自动按月份/季度拆分任务。
+- InSAR 处理链对接，例如 ISCE、SNAP、MintPy。
+- 场景覆盖图层和轨道号统计。
+- 下载完成后的数据质量检查。
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..1897c28
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,25 @@
+[project]
+name = "sentinel-orbit-downloader"
+version = "0.1.0"
+description = "Query and download Sentinel-1 scenes and precise orbit files"
+readme = "README.md"
+authors = [
+    { name = "Harmon", email = "rs_bhm@163.com" }
+]
+requires-python = ">=3.11,<3.14"
+dependencies = [
+    "asf-search>=12.0.7",
+    "fastapi>=0.116.1",
+    "s1-orbits>=0.2.0",
+    "shapely>=2.1.2",
+    "uvicorn>=0.35.0",
+]
+
+[project.scripts]
+sentinel-orbit-downloader = "sentinel_orbit_downloader:main"
+s1-dl = "sentinel_orbit_downloader:main"
+s1-web = "sentinel_orbit_downloader.api.app:main"
+
+[build-system]
+requires = ["uv_build>=0.11.8,<0.12.0"]
+build-backend = "uv_build"
diff --git a/src/sentinel_orbit_downloader/__init__.py b/src/sentinel_orbit_downloader/__init__.py
new file mode 100644
index 0000000..ed32c05
--- /dev/null
+++ b/src/sentinel_orbit_downloader/__init__.py
@@ -0,0 +1,3 @@
+from .cli import main
+
+__all__ = ["main"]
diff --git a/src/sentinel_orbit_downloader/__main__.py b/src/sentinel_orbit_downloader/__main__.py
new file mode 100644
index 0000000..a049ad7
--- /dev/null
+++ b/src/sentinel_orbit_downloader/__main__.py
@@ -0,0 +1,5 @@
+from .cli import main
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/src/sentinel_orbit_downloader/api/__init__.py b/src/sentinel_orbit_downloader/api/__init__.py
new file mode 100644
index 0000000..d9c5b70
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/__init__.py
@@ -0,0 +1 @@
+"""FastAPI application package."""
diff --git a/src/sentinel_orbit_downloader/api/app.py b/src/sentinel_orbit_downloader/api/app.py
new file mode 100644
index 0000000..3e65c8a
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/app.py
@@ -0,0 +1,57 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+import uvicorn
+from fastapi import FastAPI
+from fastapi.responses import FileResponse
+from fastapi.staticfiles import StaticFiles
+
+from sentinel_orbit_downloader.api.routes_downloads import router as downloads_router
+from sentinel_orbit_downloader.api.routes_health import router as health_router
+from sentinel_orbit_downloader.api.routes_jobs import router as jobs_router
+from sentinel_orbit_downloader.api.routes_projects import router as projects_router
+from sentinel_orbit_downloader.api.routes_regions import router as regions_router
+from sentinel_orbit_downloader.api.routes_search import router as search_router
+from sentinel_orbit_downloader.api.routes_settings import router as settings_router
+from sentinel_orbit_downloader.core.config import configured_api_host, configured_api_port
+
+
+def create_app() -> FastAPI:
+    app = FastAPI(
+        title="Sentinel Orbit Downloader API",
+        version="0.1.0",
+        description="Local API for Sentinel-1 search, orbit matching, and task management.",
+    )
+
+    web_root = Path(__file__).resolve().parents[1] / "web"
+    app.mount("/static", StaticFiles(directory=web_root), name="static")
+
+    @app.get("/", include_in_schema=False)
+    def index() -> FileResponse:
+        return FileResponse(web_root / "index.html")
+
+    @app.get("/app", include_in_schema=False)
+    def app_index() -> FileResponse:
+        return FileResponse(web_root / "index.html")
+
+    app.include_router(health_router, prefix="/api")
+    app.include_router(regions_router, prefix="/api")
+    app.include_router(projects_router, prefix="/api")
+    app.include_router(jobs_router, prefix="/api")
+    app.include_router(search_router, prefix="/api")
+    app.include_router(downloads_router, prefix="/api")
+    app.include_router(settings_router, prefix="/api")
+    return app
+
+
+app = create_app()
+
+
+def main() -> None:
+    uvicorn.run(
+        "sentinel_orbit_downloader.api.app:app",
+        host=configured_api_host(),
+        port=configured_api_port(),
+        reload=False,
+    )
diff --git a/src/sentinel_orbit_downloader/api/deps.py b/src/sentinel_orbit_downloader/api/deps.py
new file mode 100644
index 0000000..7ffb4db
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/deps.py
@@ -0,0 +1,9 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from sentinel_orbit_downloader.core.config import configured_db_path
+
+
+def get_db_path() -> Path:
+    return configured_db_path()
diff --git a/src/sentinel_orbit_downloader/api/routes_downloads.py b/src/sentinel_orbit_downloader/api/routes_downloads.py
new file mode 100644
index 0000000..6addca0
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/routes_downloads.py
@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from fastapi import APIRouter, BackgroundTasks, Depends, HTTPException, status
+
+from sentinel_orbit_downloader.api.deps import get_db_path
+from sentinel_orbit_downloader.api.schemas import DownloadJobCreateRequest, DownloadJobCreateResponse, JobSummary
+from sentinel_orbit_downloader.services.asf_client import credentials_available
+from sentinel_orbit_downloader.services.download_manager import DownloadJobRequest, execute_download_job, queue_download_job
+from sentinel_orbit_downloader.services.project_store import get_job
+from sentinel_orbit_downloader.services.settings_store import get_saved_earthdata_credentials
+
+
+router = APIRouter(prefix="/download-jobs", tags=["download-jobs"])
+
+
+@router.post("", response_model=DownloadJobCreateResponse, status_code=status.HTTP_202_ACCEPTED)
+def create_download_job_endpoint(
+    request: DownloadJobCreateRequest,
+    background_tasks: BackgroundTasks,
+    db_path=Depends(get_db_path),
+) -> DownloadJobCreateResponse:
+    job = get_job(db_path, request.job_id)
+    if job is None:
+        raise HTTPException(status_code=404, detail=f"Job not found: {request.job_id}")
+
+    saved_username, saved_password = get_saved_earthdata_credentials(db_path)
+    resolved_username = request.username or saved_username
+    resolved_password = request.password or saved_password
+
+    if not request.skip_data and not credentials_available(resolved_username, resolved_password):
+        raise HTTPException(
+            status_code=400,
+            detail=(
+                "下载 Sentinel-1 原始产品需要 Earthdata 用户名和密码。"
+                "请在页面填写 Earthdata 用户名/密码，或先保存到本地配置，或先设置 EARTHDATA_USER 和 EARTHDATA_PASS。"
+                "如果这次只想补轨道，请把“跳过产品”设为“是”。"
+            ),
+        )
+
+    manager_request = DownloadJobRequest(
+        job_id=request.job_id,
+        data_dir=Path(request.data_dir) if request.data_dir else None,
+        orbit_dir=Path(request.orbit_dir) if request.orbit_dir else None,
+        manifest_path=Path(request.manifest_path) if request.manifest_path else None,
+        skip_data=request.skip_data,
+        skip_orbits=request.skip_orbits,
+        processes=request.processes,
+        ignore_orbit_errors=request.ignore_orbit_errors,
+        username=resolved_username,
+        password=resolved_password,
+    )
+
+    try:
+        queue_download_job(db_path, manager_request)
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+    background_tasks.add_task(execute_download_job, db_path, manager_request)
+    queued_job = get_job(db_path, request.job_id)
+    if queued_job is None:
+        raise HTTPException(status_code=500, detail=f"Job disappeared after queueing: {request.job_id}")
+    return DownloadJobCreateResponse(
+        message="Download job queued",
+        job=JobSummary.model_validate(queued_job),
+    )
diff --git a/src/sentinel_orbit_downloader/api/routes_health.py b/src/sentinel_orbit_downloader/api/routes_health.py
new file mode 100644
index 0000000..99cbdb7
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/routes_health.py
@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends
+
+from sentinel_orbit_downloader.api.deps import get_db_path
+from sentinel_orbit_downloader.api.schemas import HealthResponse
+
+
+router = APIRouter(tags=["health"])
+
+
+@router.get("/health", response_model=HealthResponse)
+def health(db_path=Depends(get_db_path)) -> HealthResponse:
+    return HealthResponse(status="ok", db_path=str(db_path))
diff --git a/src/sentinel_orbit_downloader/api/routes_jobs.py b/src/sentinel_orbit_downloader/api/routes_jobs.py
new file mode 100644
index 0000000..7b82042
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/routes_jobs.py
@@ -0,0 +1,90 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+
+from sentinel_orbit_downloader.api.deps import get_db_path
+from sentinel_orbit_downloader.api.schemas import (
+    JobDeleteResponse,
+    JobDetailResponse,
+    JobEventResponse,
+    JobSceneResponse,
+    JobSummary,
+)
+from sentinel_orbit_downloader.services.project_store import (
+    clear_jobs,
+    delete_job,
+    get_job,
+    list_job_events,
+    list_job_scenes,
+    list_jobs,
+)
+
+
+router = APIRouter(prefix="/jobs", tags=["jobs"])
+
+
+@router.get("", response_model=list[JobSummary])
+def jobs(
+    project_id: int | None = Query(default=None),
+    limit: int = Query(default=20, ge=1, le=200),
+    db_path=Depends(get_db_path),
+) -> list[JobSummary]:
+    return [JobSummary.model_validate(job) for job in list_jobs(db_path, project_id=project_id, limit=limit)]
+
+
+@router.delete("", response_model=JobDeleteResponse)
+def clear_jobs_endpoint(
+    project_id: int | None = Query(default=None),
+    force: bool = Query(default=False),
+    db_path=Depends(get_db_path),
+) -> JobDeleteResponse:
+    deleted_job_ids = clear_jobs(db_path, project_id=project_id, include_running=force)
+    return JobDeleteResponse(
+        message="任务已清空" if deleted_job_ids else "没有可清空的任务",
+        deleted_count=len(deleted_job_ids),
+        deleted_job_ids=deleted_job_ids,
+    )
+
+
+@router.get("/{job_id}", response_model=JobDetailResponse)
+def job_detail(
+    job_id: int,
+    include_events: bool = Query(default=False),
+    db_path=Depends(get_db_path),
+) -> JobDetailResponse:
+    job = get_job(db_path, job_id)
+    if job is None:
+        raise HTTPException(status_code=404, detail=f"Job not found: {job_id}")
+    scenes = [JobSceneResponse(**scene) for scene in list_job_scenes(db_path, job_id)]
+    events = []
+    if include_events:
+        events = [JobEventResponse(**event) for event in list_job_events(db_path, job_id)]
+    return JobDetailResponse(
+        job=JobSummary.model_validate(job),
+        scenes=scenes,
+        events=events,
+    )
+
+
+@router.delete("/{job_id}", response_model=JobDeleteResponse, status_code=status.HTTP_200_OK)
+def delete_job_endpoint(
+    job_id: int,
+    force: bool = Query(default=False),
+    db_path=Depends(get_db_path),
+) -> JobDeleteResponse:
+    job = get_job(db_path, job_id)
+    if job is None:
+        raise HTTPException(status_code=404, detail=f"Job not found: {job_id}")
+    if job.status == "running" and not force:
+        raise HTTPException(
+            status_code=409,
+            detail="任务仍在运行。请先停止服务后再删，或使用强制删除。",
+        )
+    deleted = delete_job(db_path, job_id)
+    if not deleted:
+        raise HTTPException(status_code=404, detail=f"Job not found: {job_id}")
+    return JobDeleteResponse(
+        message="任务已删除",
+        deleted_count=1,
+        deleted_job_ids=[job_id],
+    )
diff --git a/src/sentinel_orbit_downloader/api/routes_projects.py b/src/sentinel_orbit_downloader/api/routes_projects.py
new file mode 100644
index 0000000..95b1a80
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/routes_projects.py
@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from fastapi import APIRouter, Depends, HTTPException
+
+from sentinel_orbit_downloader.api.deps import get_db_path
+from sentinel_orbit_downloader.api.schemas import ProjectCreateRequest, ProjectResponse
+from sentinel_orbit_downloader.services.project_store import create_project, get_project, list_projects
+
+
+router = APIRouter(prefix="/projects", tags=["projects"])
+
+
+@router.get("", response_model=list[ProjectResponse])
+def projects(db_path=Depends(get_db_path)) -> list[ProjectResponse]:
+    return [ProjectResponse.model_validate(project) for project in list_projects(db_path)]
+
+
+@router.post("", response_model=ProjectResponse)
+def create_project_endpoint(
+    request: ProjectCreateRequest,
+    db_path=Depends(get_db_path),
+) -> ProjectResponse:
+    try:
+        project = create_project(
+            db_path,
+            name=request.name,
+            data_root=Path(request.data_root),
+            description=request.description,
+            slug=request.slug,
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+    except PermissionError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+    return ProjectResponse.model_validate(project)
+
+
+@router.get("/{project_id}", response_model=ProjectResponse)
+def project_detail(project_id: int, db_path=Depends(get_db_path)) -> ProjectResponse:
+    project = get_project(db_path, project_id)
+    if project is None:
+        raise HTTPException(status_code=404, detail=f"Project not found: {project_id}")
+    return ProjectResponse.model_validate(project)
diff --git a/src/sentinel_orbit_downloader/api/routes_regions.py b/src/sentinel_orbit_downloader/api/routes_regions.py
new file mode 100644
index 0000000..35b6e8e
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/routes_regions.py
@@ -0,0 +1,60 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from fastapi import APIRouter, Depends, HTTPException, Query
+
+from sentinel_orbit_downloader.api.deps import get_db_path
+from sentinel_orbit_downloader.api.schemas import (
+    RegionDetail,
+    RegionImportRequest,
+    RegionImportResponse,
+    RegionSummary,
+)
+from sentinel_orbit_downloader.api.serializers import region_detail, region_summary
+from sentinel_orbit_downloader.services.region_catalog import (
+    get_region,
+    import_regions,
+    search_regions,
+)
+
+
+router = APIRouter(prefix="/regions", tags=["regions"])
+
+
+@router.post("/import", response_model=RegionImportResponse)
+def import_region_catalog(
+    request: RegionImportRequest,
+    db_path=Depends(get_db_path),
+) -> RegionImportResponse:
+    source_path = Path(request.source_path)
+    if not source_path.exists():
+        raise HTTPException(status_code=404, detail=f"GeoJSON file not found: {source_path}")
+    stats = import_regions(db_path, source_path, simplify_tolerance=request.simplify_tolerance)
+    return RegionImportResponse(
+        source_path=str(stats.source_path),
+        simplify_tolerance=stats.simplify_tolerance,
+        total_features=stats.total_features,
+        imported=stats.imported,
+    )
+
+
+@router.get("/search", response_model=list[RegionSummary])
+def search_region_catalog(
+    q: str = Query(..., min_length=1),
+    level: str | None = Query(default=None),
+    limit: int = Query(default=20, ge=1, le=200),
+    db_path=Depends(get_db_path),
+) -> list[RegionSummary]:
+    return [
+        region_summary(region)
+        for region in search_regions(db_path, q, limit=limit, level=level)
+    ]
+
+
+@router.get("/{adcode}", response_model=RegionDetail)
+def get_region_detail(adcode: str, db_path=Depends(get_db_path)) -> RegionDetail:
+    region = get_region(db_path, adcode)
+    if region is None:
+        raise HTTPException(status_code=404, detail=f"Region not found: {adcode}")
+    return region_detail(region)
diff --git a/src/sentinel_orbit_downloader/api/routes_search.py b/src/sentinel_orbit_downloader/api/routes_search.py
new file mode 100644
index 0000000..7f62197
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/routes_search.py
@@ -0,0 +1,121 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, HTTPException
+
+from sentinel_orbit_downloader.api.deps import get_db_path
+from sentinel_orbit_downloader.api.schemas import JobSceneResponse, JobSummary, SearchJobCreateRequest, SearchJobCreateResponse
+from sentinel_orbit_downloader.services.aoi import bbox_to_wkt
+from sentinel_orbit_downloader.services.asf_client import SearchParams, query_scenes
+from sentinel_orbit_downloader.services.project_store import (
+    create_search_job,
+    get_job,
+    get_project,
+    list_job_scenes,
+    record_job_event,
+    save_query_results,
+    update_search_job,
+)
+from sentinel_orbit_downloader.services.region_catalog import get_region, region_wkt
+
+
+router = APIRouter(prefix="/search-jobs", tags=["search-jobs"])
+
+
+@router.post("", response_model=SearchJobCreateResponse)
+def create_search_job_endpoint(
+    request: SearchJobCreateRequest,
+    db_path=Depends(get_db_path),
+) -> SearchJobCreateResponse:
+    if request.project_id is not None and get_project(db_path, request.project_id) is None:
+        raise HTTPException(status_code=404, detail=f"Project not found: {request.project_id}")
+
+    try:
+        aoi_meta = resolve_search_aoi(request, db_path)
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+    job = create_search_job(
+        db_path,
+        project_id=request.project_id,
+        source_type=aoi_meta["source_type"],
+        source_value=aoi_meta["source_value"],
+        region_adcode=aoi_meta["region_adcode"],
+        region_name=aoi_meta["region_name"],
+        start_time=request.start,
+        end_time=request.end,
+        processing_level=request.processing_level,
+        beam_mode=request.beam_mode,
+        flight_direction=request.flight_direction.upper() if request.flight_direction else None,
+        polarization=request.polarization,
+        relative_orbit=request.relative_orbit,
+        max_results=request.max_results,
+        manifest_path=request.manifest_path,
+    )
+    record_job_event(db_path, job.id, "info", "API search job created")
+
+    try:
+        params = SearchParams(
+            aoi_wkt=aoi_meta["aoi_wkt"],
+            start=request.start,
+            end=request.end,
+            processing_level=request.processing_level,
+            beam_mode=request.beam_mode,
+            flight_direction=request.flight_direction,
+            polarization=request.polarization,
+            relative_orbit=request.relative_orbit,
+            max_results=request.max_results,
+        )
+        results = query_scenes(params)
+        save_query_results(db_path, job.id, results)
+        update_search_job(
+            db_path,
+            job.id,
+            status="succeeded",
+            result_count=len(results),
+            manifest_path=request.manifest_path,
+        )
+        record_job_event(db_path, job.id, "info", f"API query returned {len(results)} scene(s)")
+    except Exception as exc:
+        update_search_job(db_path, job.id, status="failed", error_message=str(exc))
+        record_job_event(db_path, job.id, "error", f"API search failed: {exc}")
+        raise HTTPException(status_code=500, detail=str(exc)) from exc
+
+    final_job = get_job(db_path, job.id)
+    if final_job is None:
+        raise HTTPException(status_code=500, detail=f"Job disappeared after creation: {job.id}")
+    scenes = [JobSceneResponse(**scene) for scene in list_job_scenes(db_path, job.id)]
+    return SearchJobCreateResponse(
+        job=JobSummary.model_validate(final_job),
+        scenes=scenes,
+    )
+
+
+def resolve_search_aoi(request: SearchJobCreateRequest, db_path) -> dict[str, str | None]:
+    if request.bbox:
+        return {
+            "aoi_wkt": bbox_to_wkt(request.bbox),
+            "source_type": "bbox",
+            "source_value": request.bbox,
+            "region_adcode": None,
+            "region_name": None,
+        }
+    if request.wkt:
+        return {
+            "aoi_wkt": request.wkt.strip(),
+            "source_type": "wkt",
+            "source_value": request.wkt.strip(),
+            "region_adcode": None,
+            "region_name": None,
+        }
+    if request.region_adcode:
+        region = get_region(db_path, request.region_adcode)
+        if region is None:
+            raise ValueError(f"Region not found: {request.region_adcode}")
+        return {
+            "aoi_wkt": region_wkt(db_path, region.adcode, simplified=not request.raw_region),
+            "source_type": "region",
+            "source_value": region.label,
+            "region_adcode": region.adcode,
+            "region_name": region.label,
+        }
+    raise ValueError("one AOI input is required")
diff --git a/src/sentinel_orbit_downloader/api/routes_settings.py b/src/sentinel_orbit_downloader/api/routes_settings.py
new file mode 100644
index 0000000..c8124c2
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/routes_settings.py
@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, HTTPException, status
+
+from sentinel_orbit_downloader.api.deps import get_db_path
+from sentinel_orbit_downloader.api.schemas import (
+    EarthdataSettingsRequest,
+    EarthdataSettingsResponse,
+    MessageResponse,
+)
+from sentinel_orbit_downloader.services.settings_store import (
+    clear_earthdata_credentials,
+    get_earthdata_settings,
+    save_earthdata_credentials,
+)
+
+
+router = APIRouter(prefix="/settings", tags=["settings"])
+
+
+@router.get("/earthdata", response_model=EarthdataSettingsResponse)
+def earthdata_settings(db_path=Depends(get_db_path)) -> EarthdataSettingsResponse:
+    settings = get_earthdata_settings(db_path)
+    return EarthdataSettingsResponse(
+        username=settings.username,
+        has_password=settings.has_password,
+    )
+
+
+@router.put("/earthdata", response_model=EarthdataSettingsResponse, status_code=status.HTTP_200_OK)
+def save_earthdata_settings(
+    request: EarthdataSettingsRequest,
+    db_path=Depends(get_db_path),
+) -> EarthdataSettingsResponse:
+    try:
+        settings = save_earthdata_credentials(
+            db_path,
+            username=request.username,
+            password=request.password,
+        )
+    except (ValueError, RuntimeError) as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+    return EarthdataSettingsResponse(
+        username=settings.username,
+        has_password=settings.has_password,
+    )
+
+
+@router.delete("/earthdata", response_model=MessageResponse)
+def delete_earthdata_settings(db_path=Depends(get_db_path)) -> MessageResponse:
+    clear_earthdata_credentials(db_path)
+    return MessageResponse(message="Earthdata 凭据已清除")
diff --git a/src/sentinel_orbit_downloader/api/schemas.py b/src/sentinel_orbit_downloader/api/schemas.py
new file mode 100644
index 0000000..67ab8bc
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/schemas.py
@@ -0,0 +1,195 @@
+from __future__ import annotations
+
+from typing import Any
+
+from pydantic import BaseModel, ConfigDict, Field, model_validator
+
+
+class HealthResponse(BaseModel):
+    status: str
+    db_path: str
+
+
+class RegionSummary(BaseModel):
+    adcode: str
+    name: str
+    level: str
+    parent_adcode: str | None = None
+    parent_name: str | None = None
+    province_adcode: str | None = None
+    province_name: str | None = None
+    label: str
+    bbox: list[float] | None = None
+    simplify_tolerance: float
+
+
+class RegionDetail(RegionSummary):
+    center: list[float] | None = None
+    centroid: list[float] | None = None
+    geometry_json: dict[str, Any]
+    wkt: str
+    simplified_wkt: str
+    children_num: int | None = None
+    tree_id: str | None = None
+
+
+class RegionImportRequest(BaseModel):
+    source_path: str = Field(default="\u5168\u56fd\u884c\u653f\u533a.geojson")
+    simplify_tolerance: float = Field(default=0.01, gt=0)
+
+
+class RegionImportResponse(BaseModel):
+    source_path: str
+    simplify_tolerance: float
+    total_features: int
+    imported: int
+
+
+class ProjectCreateRequest(BaseModel):
+    name: str
+    data_root: str
+    description: str | None = None
+    slug: str | None = None
+
+
+class ProjectResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    name: str
+    slug: str
+    data_root: str
+    description: str | None = None
+    created_at: str
+    updated_at: str
+
+
+class JobSummary(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    project_id: int | None = None
+    source_type: str
+    source_value: str | None = None
+    region_adcode: str | None = None
+    region_name: str | None = None
+    start_time: str
+    end_time: str
+    processing_level: str
+    beam_mode: str | None = None
+    flight_direction: str | None = None
+    polarization: str | None = None
+    relative_orbit: int | None = None
+    max_results: int
+    status: str
+    result_count: int | None = None
+    data_dir: str | None = None
+    orbit_dir: str | None = None
+    manifest_path: str | None = None
+    error_message: str | None = None
+    created_at: str
+    finished_at: str | None = None
+
+
+class JobSceneResponse(BaseModel):
+    job_id: int
+    scene_id: str
+    selected: int
+    product_status: str
+    orbit_status: str
+    product_path: str | None = None
+    orbit_path: str | None = None
+    platform: str | None = None
+    start_time: str | None = None
+    stop_time: str | None = None
+    processing_level: str | None = None
+    flight_direction: str | None = None
+    relative_orbit: int | None = None
+    size_mb: float | None = None
+
+
+class JobEventResponse(BaseModel):
+    id: int
+    level: str
+    message: str
+    created_at: str
+
+
+class JobDetailResponse(BaseModel):
+    job: JobSummary
+    scenes: list[JobSceneResponse]
+    events: list[JobEventResponse] = Field(default_factory=list)
+
+
+class SearchJobCreateRequest(BaseModel):
+    project_id: int | None = None
+    bbox: str | None = None
+    wkt: str | None = None
+    region_adcode: str | None = None
+    start: str
+    end: str
+    processing_level: str = "SLC"
+    beam_mode: str | None = "IW"
+    flight_direction: str | None = None
+    polarization: str | None = None
+    relative_orbit: int | None = None
+    max_results: int = Field(default=50, ge=1)
+    manifest_path: str | None = None
+    raw_region: bool = False
+
+    @model_validator(mode="after")
+    def validate_aoi(self) -> "SearchJobCreateRequest":
+        provided = [self.bbox, self.wkt, self.region_adcode]
+        count = sum(1 for value in provided if value)
+        if count != 1:
+            raise ValueError("provide exactly one of bbox, wkt, or region_adcode")
+        return self
+
+
+class SearchJobCreateResponse(BaseModel):
+    job: JobSummary
+    scenes: list[JobSceneResponse]
+
+
+class DownloadJobCreateRequest(BaseModel):
+    job_id: int = Field(ge=1)
+    data_dir: str | None = None
+    orbit_dir: str | None = None
+    manifest_path: str | None = None
+    skip_data: bool = False
+    skip_orbits: bool = False
+    processes: int = Field(default=2, ge=1)
+    ignore_orbit_errors: bool = False
+    username: str | None = None
+    password: str | None = None
+
+    @model_validator(mode="after")
+    def validate_download_flags(self) -> "DownloadJobCreateRequest":
+        if self.skip_data and self.skip_orbits:
+            raise ValueError("skip_data and skip_orbits cannot both be true")
+        return self
+
+
+class DownloadJobCreateResponse(BaseModel):
+    message: str
+    job: JobSummary
+
+
+class MessageResponse(BaseModel):
+    message: str
+
+
+class EarthdataSettingsRequest(BaseModel):
+    username: str
+    password: str
+
+
+class EarthdataSettingsResponse(BaseModel):
+    username: str | None = None
+    has_password: bool = False
+
+
+class JobDeleteResponse(BaseModel):
+    message: str
+    deleted_count: int
+    deleted_job_ids: list[int] = Field(default_factory=list)
diff --git a/src/sentinel_orbit_downloader/api/serializers.py b/src/sentinel_orbit_downloader/api/serializers.py
new file mode 100644
index 0000000..97d26ae
--- /dev/null
+++ b/src/sentinel_orbit_downloader/api/serializers.py
@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+import json
+
+from sentinel_orbit_downloader.api.schemas import RegionDetail, RegionSummary
+
+
+def region_summary(region) -> RegionSummary:
+    bbox = list(region.bbox) if region.bbox is not None else None
+    return RegionSummary(
+        adcode=region.adcode,
+        name=region.name,
+        level=region.level,
+        parent_adcode=region.parent_adcode,
+        parent_name=region.parent_name,
+        province_adcode=region.province_adcode,
+        province_name=region.province_name,
+        label=region.label,
+        bbox=bbox,
+        simplify_tolerance=region.simplify_tolerance,
+    )
+
+
+def region_detail(region) -> RegionDetail:
+    summary = region_summary(region)
+    center = (
+        [region.center_lon, region.center_lat]
+        if region.center_lon is not None and region.center_lat is not None
+        else None
+    )
+    centroid = (
+        [region.centroid_lon, region.centroid_lat]
+        if region.centroid_lon is not None and region.centroid_lat is not None
+        else None
+    )
+    return RegionDetail(
+        **summary.model_dump(),
+        center=center,
+        centroid=centroid,
+        geometry_json=json.loads(region.geometry_json),
+        wkt=region.wkt,
+        simplified_wkt=region.simplified_wkt,
+        children_num=region.children_num,
+        tree_id=region.tree_id,
+    )
diff --git a/src/sentinel_orbit_downloader/cli.py b/src/sentinel_orbit_downloader/cli.py
new file mode 100644
index 0000000..9c626d7
--- /dev/null
+++ b/src/sentinel_orbit_downloader/cli.py
@@ -0,0 +1,815 @@
+from __future__ import annotations
+
+import argparse
+import json
+import sys
+from pathlib import Path
+from typing import Any, Sequence
+
+from sentinel_orbit_downloader.core.config import DEFAULT_DB_PATH
+from sentinel_orbit_downloader.services.aoi import aoi_file_to_wkt, bbox_to_wkt
+from sentinel_orbit_downloader.services.asf_client import (
+    SearchParams,
+    build_session,
+    product_size_mb,
+    query_scenes,
+    scene_name_from_product,
+    write_manifest,
+)
+from sentinel_orbit_downloader.services.orbit_client import (
+    collect_orbit_scenes,
+    download_orbits,
+    scene_names_from_results,
+)
+from sentinel_orbit_downloader.services.project_store import (
+    create_project,
+    create_search_job,
+    get_job,
+    get_project,
+    list_job_events,
+    list_job_scenes,
+    list_jobs,
+    list_projects,
+    record_download_result,
+    record_job_event,
+    save_query_results,
+    update_search_job,
+)
+from sentinel_orbit_downloader.services.region_catalog import (
+    get_region,
+    import_regions,
+    region_wkt,
+    search_regions,
+)
+
+
+DEFAULT_REGION_FILE = Path("\u5168\u56fd\u884c\u653f\u533a.geojson")
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    parser = build_parser()
+    args = parser.parse_args(argv)
+    try:
+        return args.func(args)
+    except KeyboardInterrupt:
+        print("Interrupted.", file=sys.stderr)
+        return 130
+    except ValueError as exc:
+        print(f"Error: {exc}", file=sys.stderr)
+        return 2
+
+
+def build_parser() -> argparse.ArgumentParser:
+    parser = argparse.ArgumentParser(
+        prog="s1-dl",
+        description="Query and download Sentinel-1 scenes plus matching orbit files.",
+    )
+    subparsers = parser.add_subparsers(dest="command", required=True)
+
+    search_parser = subparsers.add_parser("search", help="query Sentinel-1 scenes")
+    add_database_arg(search_parser)
+    add_project_arg(search_parser)
+    add_query_args(search_parser)
+    add_manifest_arg(search_parser)
+    search_parser.set_defaults(func=cmd_search)
+
+    download_parser = subparsers.add_parser(
+        "download",
+        help="query scenes, download products, and fetch matching orbit files",
+    )
+    add_database_arg(download_parser)
+    add_project_arg(download_parser)
+    add_query_args(download_parser)
+    download_parser.add_argument(
+        "--out",
+        type=Path,
+        default=Path("downloads"),
+        help="output root directory; data and orbits subdirectories are created here",
+    )
+    download_parser.add_argument(
+        "--data-dir",
+        type=Path,
+        help="override product download directory; default is <out>/data",
+    )
+    download_parser.add_argument(
+        "--orbit-dir",
+        type=Path,
+        help="override orbit download directory; default is <out>/orbits",
+    )
+    download_parser.add_argument(
+        "--username",
+        help="NASA Earthdata username; defaults to EARTHDATA_USER or EARTHDATA_USERNAME",
+    )
+    download_parser.add_argument(
+        "--password",
+        help="NASA Earthdata password; defaults to EARTHDATA_PASS or EARTHDATA_PASSWORD",
+    )
+    download_parser.add_argument(
+        "--ask-password",
+        action="store_true",
+        help="prompt for the Earthdata password instead of reading an argument/env var",
+    )
+    download_parser.add_argument(
+        "--processes",
+        type=positive_int,
+        default=2,
+        help="parallel ASF download processes",
+    )
+    download_parser.add_argument(
+        "--skip-data",
+        action="store_true",
+        help="do not download product zip files; useful for orbit-only runs from query results",
+    )
+    download_parser.add_argument(
+        "--skip-orbits",
+        action="store_true",
+        help="do not download matching orbit files",
+    )
+    download_parser.add_argument(
+        "--ignore-orbit-errors",
+        action="store_true",
+        help="return success even if some orbit files cannot be found",
+    )
+    add_manifest_arg(download_parser)
+    download_parser.set_defaults(func=cmd_download)
+
+    orbit_parser = subparsers.add_parser(
+        "orbits",
+        help="download orbit files for existing scenes or local .zip/.SAFE products",
+    )
+    scene_group = orbit_parser.add_mutually_exclusive_group(required=True)
+    scene_group.add_argument(
+        "--scene",
+        action="append",
+        help="Sentinel-1 scene name; may be repeated",
+    )
+    scene_group.add_argument(
+        "--scene-file",
+        type=Path,
+        help="text file containing one scene name per line",
+    )
+    scene_group.add_argument(
+        "--data-dir",
+        type=Path,
+        help="directory containing Sentinel-1 .zip files or .SAFE folders",
+    )
+    orbit_parser.add_argument(
+        "--out",
+        type=Path,
+        default=Path("orbits"),
+        help="orbit output directory",
+    )
+    orbit_parser.add_argument(
+        "--ignore-errors",
+        action="store_true",
+        help="return success even if some orbit files cannot be found",
+    )
+    orbit_parser.set_defaults(func=cmd_orbits)
+
+    regions_parser = subparsers.add_parser(
+        "regions",
+        help="import and query administrative boundary regions",
+    )
+    add_database_arg(regions_parser)
+    region_subparsers = regions_parser.add_subparsers(dest="regions_command", required=True)
+
+    regions_import = region_subparsers.add_parser("import", help="import a GeoJSON region catalog")
+    add_database_arg(regions_import)
+    regions_import.add_argument(
+        "source",
+        nargs="?",
+        type=Path,
+        default=DEFAULT_REGION_FILE,
+        help=f"GeoJSON source file; default is .\\{DEFAULT_REGION_FILE.name}",
+    )
+    regions_import.add_argument(
+        "--simplify-tolerance",
+        type=float,
+        default=0.01,
+        help="Shapely simplify tolerance used to derive query WKT",
+    )
+    regions_import.set_defaults(func=cmd_regions_import)
+
+    regions_search_parser = region_subparsers.add_parser("search", help="search regions by name or adcode")
+    add_database_arg(regions_search_parser)
+    regions_search_parser.add_argument("query", help="query text, for example mudanjiang or 231000")
+    regions_search_parser.add_argument(
+        "--limit",
+        type=positive_int,
+        default=20,
+        help="maximum number of matches to return",
+    )
+    regions_search_parser.add_argument(
+        "--level",
+        choices=("country", "province", "city", "district"),
+        help="optional level filter",
+    )
+    regions_search_parser.set_defaults(func=cmd_regions_search)
+
+    regions_export_parser = region_subparsers.add_parser("export", help="export region geometry or metadata")
+    add_database_arg(regions_export_parser)
+    regions_export_parser.add_argument("adcode", help="region adcode")
+    regions_export_parser.add_argument(
+        "--format",
+        choices=("wkt", "geojson", "bbox", "json"),
+        default="wkt",
+        help="output format",
+    )
+    regions_export_parser.add_argument(
+        "--raw",
+        action="store_true",
+        help="use the original geometry instead of simplified WKT/json",
+    )
+    regions_export_parser.add_argument(
+        "--out",
+        type=Path,
+        help="optional file to write the exported value to",
+    )
+    regions_export_parser.set_defaults(func=cmd_regions_export)
+
+    projects_parser = subparsers.add_parser("projects", help="manage local projects")
+    add_database_arg(projects_parser)
+    project_subparsers = projects_parser.add_subparsers(dest="projects_command", required=True)
+
+    projects_create = project_subparsers.add_parser("create", help="create a project")
+    add_database_arg(projects_create)
+    projects_create.add_argument("--name", required=True, help="project name")
+    projects_create.add_argument("--data-root", type=Path, required=True, help="project data root")
+    projects_create.add_argument("--description", help="optional description")
+    projects_create.add_argument("--slug", help="optional directory-friendly slug")
+    projects_create.set_defaults(func=cmd_projects_create)
+
+    projects_list_parser = project_subparsers.add_parser("list", help="list projects")
+    add_database_arg(projects_list_parser)
+    projects_list_parser.set_defaults(func=cmd_projects_list)
+
+    projects_show_parser = project_subparsers.add_parser("show", help="show one project")
+    add_database_arg(projects_show_parser)
+    projects_show_parser.add_argument("project_id", type=positive_int, help="project id")
+    projects_show_parser.set_defaults(func=cmd_projects_show)
+
+    jobs_parser = subparsers.add_parser("jobs", help="inspect saved query and download jobs")
+    add_database_arg(jobs_parser)
+    jobs_subparsers = jobs_parser.add_subparsers(dest="jobs_command", required=True)
+
+    jobs_list_parser = jobs_subparsers.add_parser("list", help="list recent jobs")
+    add_database_arg(jobs_list_parser)
+    jobs_list_parser.add_argument("--project-id", type=positive_int, help="optional project filter")
+    jobs_list_parser.add_argument("--limit", type=positive_int, default=20, help="maximum jobs to list")
+    jobs_list_parser.set_defaults(func=cmd_jobs_list)
+
+    jobs_show_parser = jobs_subparsers.add_parser("show", help="show one job and its scenes")
+    add_database_arg(jobs_show_parser)
+    jobs_show_parser.add_argument("job_id", type=positive_int, help="job id")
+    jobs_show_parser.add_argument(
+        "--events",
+        action="store_true",
+        help="include stored job events",
+    )
+    jobs_show_parser.set_defaults(func=cmd_jobs_show)
+
+    return parser
+
+
+def add_database_arg(parser: argparse.ArgumentParser) -> None:
+    parser.add_argument(
+        "--db",
+        type=Path,
+        default=DEFAULT_DB_PATH,
+        help=f"SQLite database path; default is {DEFAULT_DB_PATH}",
+    )
+
+
+def add_project_arg(parser: argparse.ArgumentParser) -> None:
+    parser.add_argument(
+        "--project-id",
+        type=positive_int,
+        help="optional project id used to group saved jobs",
+    )
+
+
+def add_query_args(parser: argparse.ArgumentParser) -> None:
+    aoi = parser.add_mutually_exclusive_group(required=True)
+    aoi.add_argument("--bbox", help="AOI bounding box as min_lon,min_lat,max_lon,max_lat")
+    aoi.add_argument("--wkt", help="AOI as WKT, for example POLYGON((...))")
+    aoi.add_argument(
+        "--aoi-file",
+        type=Path,
+        help="AOI file containing WKT, GeoJSON Feature, or GeoJSON geometry",
+    )
+    aoi.add_argument(
+        "--region-adcode",
+        help="AOI from imported region catalog; use `s1-dl regions search` first",
+    )
+    parser.add_argument(
+        "--raw-region",
+        action="store_true",
+        help="when using --region-adcode, use the original geometry instead of simplified WKT",
+    )
+    parser.add_argument("--start", required=True, help="start date/time, e.g. 2024-01-01")
+    parser.add_argument("--end", required=True, help="end date/time, e.g. 2024-02-01")
+    parser.add_argument(
+        "--processing-level",
+        default="SLC",
+        help="ASF processing level, e.g. SLC, GRD_HD, GRD_MD, OCN",
+    )
+    parser.add_argument("--beam-mode", default="IW", help="beam mode, e.g. IW, EW, WV")
+    parser.add_argument(
+        "--flight-direction",
+        choices=("ASCENDING", "DESCENDING", "ascending", "descending"),
+        help="optional orbit direction filter",
+    )
+    parser.add_argument("--polarization", help="optional polarization filter, e.g. VV+VH")
+    parser.add_argument(
+        "--relative-orbit",
+        type=positive_int,
+        help="optional Sentinel-1 relative orbit/track number",
+    )
+    parser.add_argument(
+        "--max-results",
+        type=positive_int,
+        default=50,
+        help="maximum scenes to return",
+    )
+
+
+def add_manifest_arg(parser: argparse.ArgumentParser) -> None:
+    parser.add_argument("--manifest", type=Path, help="write search results to .csv or .json")
+
+
+def cmd_search(args: argparse.Namespace) -> int:
+    ensure_project_exists(args.db, args.project_id)
+    aoi_meta = resolve_aoi(args)
+    job = create_search_job(
+        args.db,
+        project_id=args.project_id,
+        source_type=aoi_meta["source_type"],
+        source_value=aoi_meta["source_value"],
+        region_adcode=aoi_meta["region_adcode"],
+        region_name=aoi_meta["region_name"],
+        start_time=args.start,
+        end_time=args.end,
+        processing_level=args.processing_level,
+        beam_mode=args.beam_mode,
+        flight_direction=args.flight_direction.upper() if args.flight_direction else None,
+        polarization=args.polarization,
+        relative_orbit=args.relative_orbit,
+        max_results=args.max_results,
+        manifest_path=str(args.manifest) if args.manifest else None,
+    )
+    record_job_event(args.db, job.id, "info", "Query created")
+
+    try:
+        results = perform_query(args, aoi_meta["aoi_wkt"])
+        save_query_results(args.db, job.id, results)
+        print_results(results)
+        if args.manifest:
+            write_manifest(results, args.manifest)
+            print(f"Wrote manifest: {args.manifest}")
+        update_search_job(
+            args.db,
+            job.id,
+            status="succeeded",
+            result_count=len(results),
+            manifest_path=str(args.manifest) if args.manifest else None,
+        )
+        record_job_event(args.db, job.id, "info", f"Query returned {len(results)} scene(s)")
+    except Exception as exc:
+        update_search_job(args.db, job.id, status="failed", error_message=str(exc))
+        record_job_event(args.db, job.id, "error", f"Query failed: {exc}")
+        raise
+
+    print(f"Saved job: {job.id}")
+    return 0
+
+
+def cmd_download(args: argparse.Namespace) -> int:
+    ensure_project_exists(args.db, args.project_id)
+    aoi_meta = resolve_aoi(args)
+
+    out_root = args.out
+    data_dir = args.data_dir or out_root / "data"
+    orbit_dir = args.orbit_dir or out_root / "orbits"
+    out_root.mkdir(parents=True, exist_ok=True)
+    manifest = args.manifest or out_root / "manifest.csv"
+
+    job = create_search_job(
+        args.db,
+        project_id=args.project_id,
+        source_type=aoi_meta["source_type"],
+        source_value=aoi_meta["source_value"],
+        region_adcode=aoi_meta["region_adcode"],
+        region_name=aoi_meta["region_name"],
+        start_time=args.start,
+        end_time=args.end,
+        processing_level=args.processing_level,
+        beam_mode=args.beam_mode,
+        flight_direction=args.flight_direction.upper() if args.flight_direction else None,
+        polarization=args.polarization,
+        relative_orbit=args.relative_orbit,
+        max_results=args.max_results,
+        data_dir=str(data_dir),
+        orbit_dir=str(orbit_dir),
+        manifest_path=str(manifest),
+    )
+    record_job_event(args.db, job.id, "info", "Download job created")
+
+    try:
+        results = perform_query(args, aoi_meta["aoi_wkt"])
+        save_query_results(args.db, job.id, results)
+        record_job_event(args.db, job.id, "info", f"Query returned {len(results)} scene(s)")
+
+        print_results(results)
+        write_manifest(results, manifest)
+        print(f"Wrote manifest: {manifest}")
+
+        if not results:
+            update_search_job(
+                args.db,
+                job.id,
+                status="succeeded",
+                result_count=0,
+                data_dir=str(data_dir),
+                orbit_dir=str(orbit_dir),
+                manifest_path=str(manifest),
+            )
+            record_job_event(args.db, job.id, "info", "No scenes matched the query")
+            print(f"Saved job: {job.id}")
+            return 0
+
+        if not args.skip_data:
+            data_dir.mkdir(parents=True, exist_ok=True)
+            session = build_session(
+                username=args.username,
+                password=args.password,
+                ask_password=args.ask_password,
+            )
+            print(f"Downloading {len(results)} product(s) to {data_dir} ...")
+            results.download(path=str(data_dir), session=session, processes=args.processes)
+            print("Product download finished.")
+            record_job_event(args.db, job.id, "info", f"Product download finished into {data_dir}")
+            record_product_downloads(args.db, job.id, results, data_dir)
+        else:
+            record_job_event(args.db, job.id, "info", "Product download skipped by request")
+            record_product_downloads(args.db, job.id, results, None)
+
+        orbit_failures = 0
+        if not args.skip_orbits:
+            scenes = scene_names_from_results(results)
+            print(f"Downloading orbit files for {len(scenes)} scene(s) to {orbit_dir} ...")
+            orbit_results = download_orbits(scenes, orbit_dir)
+            orbit_failures = summarize_orbit_results(orbit_results)
+            record_orbit_downloads(args.db, job.id, orbit_results)
+            record_job_event(
+                args.db,
+                job.id,
+                "info",
+                f"Orbit download finished: {len(orbit_results) - orbit_failures} ok, {orbit_failures} failed",
+            )
+        else:
+            record_job_event(args.db, job.id, "info", "Orbit download skipped by request")
+
+        final_status = "partial_failed" if orbit_failures else "succeeded"
+        update_search_job(
+            args.db,
+            job.id,
+            status=final_status,
+            result_count=len(results),
+            data_dir=str(data_dir),
+            orbit_dir=str(orbit_dir),
+            manifest_path=str(manifest),
+        )
+
+        print(f"Saved job: {job.id}")
+        if orbit_failures and not args.ignore_orbit_errors:
+            return 1
+        return 0
+    except Exception as exc:
+        update_search_job(
+            args.db,
+            job.id,
+            status="failed",
+            result_count=None,
+            data_dir=str(data_dir),
+            orbit_dir=str(orbit_dir),
+            manifest_path=str(manifest),
+            error_message=str(exc),
+        )
+        record_job_event(args.db, job.id, "error", f"Download job failed: {exc}")
+        raise
+
+
+def cmd_orbits(args: argparse.Namespace) -> int:
+    scenes = collect_orbit_scenes(
+        scenes=args.scene,
+        scene_file=args.scene_file,
+        data_dir=args.data_dir,
+    )
+    if not scenes:
+        print("No Sentinel-1 scenes found.", file=sys.stderr)
+        return 1
+
+    print(f"Downloading orbit files for {len(scenes)} scene(s) to {args.out} ...")
+    results = download_orbits(scenes, args.out)
+    failures = summarize_orbit_results(results)
+    if failures and not args.ignore_errors:
+        return 1
+    return 0
+
+
+def cmd_regions_import(args: argparse.Namespace) -> int:
+    if not args.source.exists():
+        raise ValueError(f"GeoJSON file does not exist: {args.source}")
+    stats = import_regions(args.db, args.source, simplify_tolerance=args.simplify_tolerance)
+    print(
+        "Imported region catalog: "
+        f"{stats.imported}/{stats.total_features} features "
+        f"from {stats.source_path} with simplify_tolerance={stats.simplify_tolerance}"
+    )
+    return 0
+
+
+def cmd_regions_search(args: argparse.Namespace) -> int:
+    matches = search_regions(args.db, args.query, limit=args.limit, level=args.level)
+    if not matches:
+        print("No regions matched.")
+        return 0
+
+    for region in matches:
+        bbox_text = ""
+        if region.bbox is not None:
+            bbox_text = ",".join(f"{value:.6f}" for value in region.bbox)
+        print(f"{region.adcode} | {region.level:<8} | {region.label} | {bbox_text}")
+    return 0
+
+
+def cmd_regions_export(args: argparse.Namespace) -> int:
+    region = get_region(args.db, args.adcode)
+    if region is None:
+        raise ValueError(f"region not found: {args.adcode}")
+
+    if args.format == "wkt":
+        output = region.wkt if args.raw else region.simplified_wkt
+    elif args.format == "geojson":
+        output = region.geometry_json
+    elif args.format == "bbox":
+        if region.bbox is None:
+            raise ValueError(f"region has no bbox: {args.adcode}")
+        output = ",".join(str(value) for value in region.bbox)
+    else:
+        payload: dict[str, Any] = {
+            "adcode": region.adcode,
+            "name": region.name,
+            "level": region.level,
+            "parent_adcode": region.parent_adcode,
+            "parent_name": region.parent_name,
+            "province_adcode": region.province_adcode,
+            "province_name": region.province_name,
+            "bbox": region.bbox,
+            "simplify_tolerance": region.simplify_tolerance,
+            "label": region.label,
+        }
+        output = json.dumps(payload, ensure_ascii=False, indent=2)
+
+    if args.out:
+        args.out.parent.mkdir(parents=True, exist_ok=True)
+        args.out.write_text(output, encoding="utf-8")
+        print(f"Wrote region export: {args.out}")
+    else:
+        print(output)
+    return 0
+
+
+def cmd_projects_create(args: argparse.Namespace) -> int:
+    project = create_project(
+        args.db,
+        name=args.name,
+        data_root=args.data_root,
+        description=args.description,
+        slug=args.slug,
+    )
+    print(f"Created project: {project.id} | {project.slug} | {project.data_root}")
+    return 0
+
+
+def cmd_projects_list(args: argparse.Namespace) -> int:
+    projects = list_projects(args.db)
+    if not projects:
+        print("No projects found.")
+        return 0
+    for project in projects:
+        desc = f" | {project.description}" if project.description else ""
+        print(f"{project.id} | {project.slug} | {project.name} | {project.data_root}{desc}")
+    return 0
+
+
+def cmd_projects_show(args: argparse.Namespace) -> int:
+    project = get_project(args.db, args.project_id)
+    if project is None:
+        raise ValueError(f"project not found: {args.project_id}")
+    print(json.dumps(project.__dict__, ensure_ascii=False, indent=2))
+    return 0
+
+
+def cmd_jobs_list(args: argparse.Namespace) -> int:
+    jobs = list_jobs(args.db, project_id=args.project_id, limit=args.limit)
+    if not jobs:
+        print("No jobs found.")
+        return 0
+    for job in jobs:
+        project_text = job.project_id if job.project_id is not None else "-"
+        target = job.region_name or job.source_value or job.source_type
+        print(
+            f"{job.id} | project={project_text} | {job.status:<14} | "
+            f"{job.start_time}..{job.end_time} | {target} | count={job.result_count}"
+        )
+    return 0
+
+
+def cmd_jobs_show(args: argparse.Namespace) -> int:
+    job = get_job(args.db, args.job_id)
+    if job is None:
+        raise ValueError(f"job not found: {args.job_id}")
+
+    print(json.dumps(job.__dict__, ensure_ascii=False, indent=2))
+    scenes = list_job_scenes(args.db, args.job_id)
+    if scenes:
+        print("\nScenes:")
+        for scene in scenes:
+            size_text = f"{scene['size_mb']:.1f} MB" if scene["size_mb"] is not None else ""
+            print(
+                f"  {scene['scene_id']} | {scene['start_time']} | {scene['processing_level']} | "
+                f"product={scene['product_status']} | orbit={scene['orbit_status']} | {size_text}"
+            )
+    if args.events:
+        events = list_job_events(args.db, args.job_id)
+        if events:
+            print("\nEvents:")
+            for event in events:
+                print(f"  [{event['created_at']}] {event['level']}: {event['message']}")
+    return 0
+
+
+def perform_query(args: argparse.Namespace, aoi_wkt: str):
+    params = SearchParams(
+        aoi_wkt=aoi_wkt,
+        start=args.start,
+        end=args.end,
+        processing_level=args.processing_level,
+        beam_mode=args.beam_mode,
+        flight_direction=args.flight_direction,
+        polarization=args.polarization,
+        relative_orbit=args.relative_orbit,
+        max_results=args.max_results,
+    )
+    print("Querying ASF Search ...")
+    return query_scenes(params)
+
+
+def resolve_aoi(args: argparse.Namespace) -> dict[str, Any]:
+    if args.bbox:
+        return {
+            "aoi_wkt": bbox_to_wkt(args.bbox),
+            "source_type": "bbox",
+            "source_value": args.bbox,
+            "region_adcode": None,
+            "region_name": None,
+        }
+    if args.wkt:
+        return {
+            "aoi_wkt": args.wkt.strip(),
+            "source_type": "wkt",
+            "source_value": args.wkt.strip(),
+            "region_adcode": None,
+            "region_name": None,
+        }
+    if args.aoi_file:
+        return {
+            "aoi_wkt": aoi_file_to_wkt(args.aoi_file),
+            "source_type": "aoi_file",
+            "source_value": str(args.aoi_file),
+            "region_adcode": None,
+            "region_name": None,
+        }
+    if args.region_adcode:
+        region = get_region(args.db, args.region_adcode)
+        if region is None:
+            raise ValueError(f"region not found: {args.region_adcode}")
+        return {
+            "aoi_wkt": region_wkt(args.db, args.region_adcode, simplified=not args.raw_region),
+            "source_type": "region",
+            "source_value": region.label,
+            "region_adcode": region.adcode,
+            "region_name": region.label,
+        }
+    raise ValueError("one AOI input is required")
+
+
+def print_results(results) -> None:
+    count = len(results)
+    print(f"Found {count} scene(s).")
+    if not count:
+        return
+
+    for index, product in enumerate(results, start=1):
+        props = product.properties
+        scene = scene_name_from_product(product) or props.get("fileID") or "<unknown>"
+        start = props.get("startTime") or ""
+        level = props.get("processingLevel") or ""
+        direction = props.get("flightDirection") or ""
+        rel_orbit = props.get("pathNumber") or ""
+        size = product_size_mb(props)
+        size_text = f"{size:.1f} MB" if size is not None else ""
+        print(f"{index:>3}. {scene} | {start} | {level} | {direction} | rel={rel_orbit} | {size_text}")
+
+
+def record_product_downloads(db_path: Path, job_id: int, results, data_dir: Path | None) -> None:
+    for product in results:
+        scene_id = scene_name_from_product(product)
+        if scene_id is None:
+            continue
+        props = product.properties
+        if data_dir is None:
+            record_download_result(
+                db_path,
+                job_id=job_id,
+                scene_id=scene_id,
+                kind="product",
+                status="skipped",
+                path=None,
+                url=string_value(props.get("url")),
+                bytes_total=float(props["bytes"]) if props.get("bytes") is not None else None,
+                bytes_done=0,
+            )
+            continue
+
+        expected = expected_product_path(product, data_dir)
+        status = "succeeded" if expected.exists() else "failed"
+        record_download_result(
+            db_path,
+            job_id=job_id,
+            scene_id=scene_id,
+            kind="product",
+            status=status,
+            path=str(expected) if expected.exists() else None,
+            url=string_value(props.get("url")),
+            bytes_total=float(props["bytes"]) if props.get("bytes") is not None else None,
+            bytes_done=float(props["bytes"]) if expected.exists() and props.get("bytes") is not None else None,
+            error_message=None if expected.exists() else "Downloaded file not found at expected path",
+        )
+
+
+def record_orbit_downloads(db_path: Path, job_id: int, orbit_results) -> None:
+    for result in orbit_results:
+        record_download_result(
+            db_path,
+            job_id=job_id,
+            scene_id=result.scene,
+            kind="orbit",
+            status="succeeded" if result.error is None else "failed",
+            path=str(result.path) if result.path is not None else None,
+            error_message=result.error,
+        )
+
+
+def expected_product_path(product, data_dir: Path) -> Path:
+    props = product.properties
+    file_name = props.get("fileName")
+    if file_name:
+        return data_dir / str(file_name)
+    url = props.get("url")
+    if url:
+        return data_dir / Path(str(url)).name
+    scene = scene_name_from_product(product) or "unknown_scene"
+    return data_dir / f"{scene}.zip"
+
+
+def summarize_orbit_results(results) -> int:
+    failures = [result for result in results if result.error]
+    for result in results:
+        if result.error:
+            print(f"Orbit failed: {result.scene}: {result.error}", file=sys.stderr)
+        else:
+            print(f"Orbit: {result.scene} -> {result.path.name}")
+    print(f"Orbit download finished: {len(results) - len(failures)} ok, {len(failures)} failed.")
+    return len(failures)
+
+
+def ensure_project_exists(db_path: Path, project_id: int | None) -> None:
+    if project_id is None:
+        return
+    if get_project(db_path, project_id) is None:
+        raise ValueError(f"project not found: {project_id}")
+
+
+def string_value(value: Any) -> str | None:
+    if value is None:
+        return None
+    return str(value)
+
+
+def positive_int(value: str) -> int:
+    number = int(value)
+    if number < 1:
+        raise argparse.ArgumentTypeError("must be >= 1")
+    return number
diff --git a/src/sentinel_orbit_downloader/core/__init__.py b/src/sentinel_orbit_downloader/core/__init__.py
new file mode 100644
index 0000000..7c16cea
--- /dev/null
+++ b/src/sentinel_orbit_downloader/core/__init__.py
@@ -0,0 +1 @@
+"""Core configuration and constants."""
diff --git a/src/sentinel_orbit_downloader/core/config.py b/src/sentinel_orbit_downloader/core/config.py
new file mode 100644
index 0000000..aaf6659
--- /dev/null
+++ b/src/sentinel_orbit_downloader/core/config.py
@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+
+DEFAULT_DB_PATH = Path(".s1dl/app.db")
+DEFAULT_API_HOST = "127.0.0.1"
+DEFAULT_API_PORT = 8010
+
+
+def configured_db_path() -> Path:
+    raw = os.getenv("S1DL_DB_PATH")
+    if not raw:
+        return DEFAULT_DB_PATH
+    return Path(raw)
+
+
+def configured_api_host() -> str:
+    return os.getenv("S1DL_API_HOST", DEFAULT_API_HOST)
+
+
+def configured_api_port() -> int:
+    raw = os.getenv("S1DL_API_PORT")
+    if not raw:
+        return DEFAULT_API_PORT
+    return int(raw)
diff --git a/src/sentinel_orbit_downloader/core/provinces.py b/src/sentinel_orbit_downloader/core/provinces.py
new file mode 100644
index 0000000..225e19f
--- /dev/null
+++ b/src/sentinel_orbit_downloader/core/provinces.py
@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+
+PROVINCES: dict[str, str] = {
+    "110000": "北京市",
+    "120000": "天津市",
+    "130000": "河北省",
+    "140000": "山西省",
+    "150000": "内蒙古自治区",
+    "210000": "辽宁省",
+    "220000": "吉林省",
+    "230000": "黑龙江省",
+    "310000": "上海市",
+    "320000": "江苏省",
+    "330000": "浙江省",
+    "340000": "安徽省",
+    "350000": "福建省",
+    "360000": "江西省",
+    "370000": "山东省",
+    "410000": "河南省",
+    "420000": "湖北省",
+    "430000": "湖南省",
+    "440000": "广东省",
+    "450000": "广西壮族自治区",
+    "460000": "海南省",
+    "500000": "重庆市",
+    "510000": "四川省",
+    "520000": "贵州省",
+    "530000": "云南省",
+    "540000": "西藏自治区",
+    "610000": "陕西省",
+    "620000": "甘肃省",
+    "630000": "青海省",
+    "640000": "宁夏回族自治区",
+    "650000": "新疆维吾尔自治区",
+    "710000": "台湾省",
+    "810000": "香港特别行政区",
+    "820000": "澳门特别行政区",
+}
+
diff --git a/src/sentinel_orbit_downloader/services/__init__.py b/src/sentinel_orbit_downloader/services/__init__.py
new file mode 100644
index 0000000..a69ee20
--- /dev/null
+++ b/src/sentinel_orbit_downloader/services/__init__.py
@@ -0,0 +1 @@
+"""Application services."""
diff --git a/src/sentinel_orbit_downloader/services/aoi.py b/src/sentinel_orbit_downloader/services/aoi.py
new file mode 100644
index 0000000..6edf331
--- /dev/null
+++ b/src/sentinel_orbit_downloader/services/aoi.py
@@ -0,0 +1,75 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from typing import Any, Iterable, Sequence
+
+
+def bbox_to_wkt(value: str) -> str:
+    parts = [part.strip() for part in value.split(",")]
+    if len(parts) != 4:
+        raise ValueError("--bbox must be min_lon,min_lat,max_lon,max_lat")
+    try:
+        min_lon, min_lat, max_lon, max_lat = (float(part) for part in parts)
+    except ValueError as exc:
+        raise ValueError("--bbox values must be numbers") from exc
+    if min_lon >= max_lon or min_lat >= max_lat:
+        raise ValueError("--bbox min values must be smaller than max values")
+    return (
+        f"POLYGON(({min_lon} {min_lat},{max_lon} {min_lat},"
+        f"{max_lon} {max_lat},{min_lon} {max_lat},{min_lon} {min_lat}))"
+    )
+
+
+def aoi_file_to_wkt(path: Path) -> str:
+    text = path.read_text(encoding="utf-8").strip()
+    if not text:
+        raise ValueError(f"AOI file is empty: {path}")
+    if text[0] != "{":
+        return text
+
+    data = json.loads(text)
+    geometry = geojson_geometry(data)
+    return geometry_to_wkt(geometry)
+
+
+def geojson_geometry(data: dict[str, Any]) -> dict[str, Any]:
+    kind = data.get("type")
+    if kind == "FeatureCollection":
+        features = data.get("features") or []
+        if not features:
+            raise ValueError("GeoJSON FeatureCollection has no features")
+        return geojson_geometry(features[0])
+    if kind == "Feature":
+        geometry = data.get("geometry")
+        if not geometry:
+            raise ValueError("GeoJSON Feature has no geometry")
+        return geometry
+    if kind in {"Polygon", "MultiPolygon", "Point", "MultiPoint", "LineString"}:
+        return data
+    raise ValueError(f"unsupported GeoJSON type: {kind}")
+
+
+def geometry_to_wkt(geometry: dict[str, Any]) -> str:
+    kind = geometry.get("type")
+    coordinates = geometry.get("coordinates")
+    if kind == "Point":
+        lon, lat = coordinates
+        return f"POINT({lon} {lat})"
+    if kind == "MultiPoint":
+        return "MULTIPOINT(" + ",".join(f"({lon} {lat})" for lon, lat in coordinates) + ")"
+    if kind == "LineString":
+        return "LINESTRING(" + coords_to_text(coordinates) + ")"
+    if kind == "Polygon":
+        return "POLYGON(" + ",".join(f"({coords_to_text(ring)})" for ring in coordinates) + ")"
+    if kind == "MultiPolygon":
+        polygons = []
+        for polygon in coordinates:
+            rings = ",".join(f"({coords_to_text(ring)})" for ring in polygon)
+            polygons.append(f"({rings})")
+        return "MULTIPOLYGON(" + ",".join(polygons) + ")"
+    raise ValueError(f"unsupported GeoJSON geometry type: {kind}")
+
+
+def coords_to_text(coords: Iterable[Sequence[float]]) -> str:
+    return ",".join(f"{lon} {lat}" for lon, lat, *_ in coords)
diff --git a/src/sentinel_orbit_downloader/services/asf_client.py b/src/sentinel_orbit_downloader/services/asf_client.py
new file mode 100644
index 0000000..5a7a3eb
--- /dev/null
+++ b/src/sentinel_orbit_downloader/services/asf_client.py
@@ -0,0 +1,151 @@
+from __future__ import annotations
+
+import csv
+import getpass
+import json
+import os
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any, Sequence
+
+import asf_search as asf
+
+
+DEFAULT_FIELDS = (
+    "scene",
+    "startTime",
+    "stopTime",
+    "processingLevel",
+    "beamModeType",
+    "flightDirection",
+    "polarization",
+    "pathNumber",
+    "platform",
+    "sizeMB",
+)
+
+
+@dataclass(frozen=True)
+class SearchParams:
+    aoi_wkt: str
+    start: str
+    end: str
+    processing_level: str = "SLC"
+    beam_mode: str | None = "IW"
+    flight_direction: str | None = None
+    polarization: str | None = None
+    relative_orbit: int | None = None
+    max_results: int = 50
+
+
+def query_scenes(params: SearchParams):
+    kwargs: dict[str, Any] = {
+        "platform": [asf.PLATFORM.SENTINEL1],
+        "processingLevel": params.processing_level,
+        "intersectsWith": params.aoi_wkt,
+        "start": params.start,
+        "end": params.end,
+        "maxResults": params.max_results,
+    }
+    if params.beam_mode:
+        kwargs["beamMode"] = params.beam_mode
+    if params.flight_direction:
+        kwargs["flightDirection"] = params.flight_direction.upper()
+    if params.polarization:
+        kwargs["polarization"] = params.polarization
+    if params.relative_orbit:
+        kwargs["relativeOrbit"] = params.relative_orbit
+    return asf.geo_search(**kwargs)
+
+
+def resolve_credentials(
+    username: str | None = None,
+    password: str | None = None,
+) -> tuple[str | None, str | None]:
+    resolved_username = username or os.getenv("EARTHDATA_USER") or os.getenv("EARTHDATA_USERNAME")
+    resolved_password = password or os.getenv("EARTHDATA_PASS") or os.getenv("EARTHDATA_PASSWORD")
+    return resolved_username, resolved_password
+
+
+def credentials_available(
+    username: str | None = None,
+    password: str | None = None,
+) -> bool:
+    resolved_username, resolved_password = resolve_credentials(username, password)
+    return bool(resolved_username and resolved_password)
+
+
+def build_session(
+    username: str | None = None,
+    password: str | None = None,
+    ask_password: bool = False,
+) -> asf.ASFSession:
+    username, password = resolve_credentials(username, password)
+    if ask_password:
+        password = getpass.getpass("Earthdata password: ")
+
+    if not username or not password:
+        raise ValueError(
+            "ASF product downloads require NASA Earthdata credentials. "
+            "Set EARTHDATA_USER/EARTHDATA_PASS or pass --username/--ask-password."
+        )
+
+    return asf.ASFSession().auth_with_creds(username, password)
+
+
+def product_size_mb(props: dict[str, Any]) -> float | None:
+    if props.get("sizeMB") is not None:
+        return float(props["sizeMB"])
+    if props.get("bytes") is not None:
+        return float(props["bytes"]) / (1024 * 1024)
+    return None
+
+
+def scene_name_from_product(product) -> str | None:
+    from .orbit_client import normalize_scene_name
+
+    props = getattr(product, "properties", {})
+    candidates: Sequence[Any] = (
+        props.get("sceneName"),
+        props.get("fileID"),
+        props.get("fileName"),
+        props.get("url"),
+    )
+    for candidate in candidates:
+        if not candidate:
+            continue
+        scene = normalize_scene_name(str(candidate))
+        if scene:
+            return scene
+    return None
+
+
+def manifest_row(product) -> dict[str, Any]:
+    props = product.properties
+    return {
+        "scene": scene_name_from_product(product),
+        "startTime": props.get("startTime"),
+        "stopTime": props.get("stopTime"),
+        "processingLevel": props.get("processingLevel"),
+        "beamModeType": props.get("beamModeType"),
+        "flightDirection": props.get("flightDirection"),
+        "polarization": props.get("polarization"),
+        "pathNumber": props.get("pathNumber"),
+        "platform": props.get("platform"),
+        "sizeMB": product_size_mb(props),
+    }
+
+
+def write_manifest(results, path: Path) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    suffix = path.suffix.lower()
+    rows = [manifest_row(product) for product in results]
+    if suffix == ".json":
+        path.write_text(json.dumps(rows, indent=2, ensure_ascii=False, default=str), encoding="utf-8")
+        return
+    if suffix not in {"", ".csv"}:
+        raise ValueError("manifest path must end with .csv or .json")
+    with path.open("w", newline="", encoding="utf-8") as handle:
+        writer = csv.DictWriter(handle, fieldnames=DEFAULT_FIELDS)
+        writer.writeheader()
+        writer.writerows(rows)
diff --git a/src/sentinel_orbit_downloader/services/download_manager.py b/src/sentinel_orbit_downloader/services/download_manager.py
new file mode 100644
index 0000000..79bbfb5
--- /dev/null
+++ b/src/sentinel_orbit_downloader/services/download_manager.py
@@ -0,0 +1,370 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Sequence
+
+import asf_search as asf
+
+from sentinel_orbit_downloader.services.asf_client import build_session, credentials_available, scene_name_from_product
+from sentinel_orbit_downloader.services.orbit_client import download_orbits
+from sentinel_orbit_downloader.services.project_store import (
+    get_job,
+    get_project,
+    list_job_scenes,
+    record_download_result,
+    record_job_event,
+    update_search_job,
+)
+
+
+@dataclass(frozen=True)
+class DownloadJobRequest:
+    job_id: int
+    data_dir: Path | None = None
+    orbit_dir: Path | None = None
+    manifest_path: Path | None = None
+    skip_data: bool = False
+    skip_orbits: bool = False
+    processes: int = 2
+    ignore_orbit_errors: bool = False
+    username: str | None = None
+    password: str | None = None
+
+
+@dataclass(frozen=True)
+class DownloadJobPaths:
+    root: Path
+    data_dir: Path
+    orbit_dir: Path
+    manifest_path: Path
+
+
+def resolve_download_paths(db_path: Path, request: DownloadJobRequest) -> DownloadJobPaths:
+    job = get_job(db_path, request.job_id)
+    if job is None:
+        raise ValueError(f"Job not found: {request.job_id}")
+
+    root = None
+    if request.data_dir is not None:
+        root = request.data_dir.parent if request.orbit_dir is None else request.data_dir.parent
+    elif request.orbit_dir is not None:
+        root = request.orbit_dir.parent
+    elif job.data_dir:
+        root = Path(job.data_dir).parent
+    elif job.project_id is not None:
+        project = get_project(db_path, job.project_id)
+        if project is not None:
+            root = Path(project.data_root) / "jobs" / f"job-{job.id:06d}"
+    if root is None:
+        root = Path(".s1dl") / "downloads" / f"job-{job.id:06d}"
+
+    data_dir = request.data_dir or (Path(job.data_dir) if job.data_dir else root / "data")
+    orbit_dir = request.orbit_dir or (Path(job.orbit_dir) if job.orbit_dir else root / "orbits")
+    manifest_path = request.manifest_path or (
+        Path(job.manifest_path) if job.manifest_path else root / "manifest.csv"
+    )
+    return DownloadJobPaths(root=root, data_dir=data_dir, orbit_dir=orbit_dir, manifest_path=manifest_path)
+
+
+def queue_download_job(db_path: Path, request: DownloadJobRequest) -> DownloadJobPaths:
+    job = get_job(db_path, request.job_id)
+    if job is None:
+        raise ValueError(f"Job not found: {request.job_id}")
+    scenes = list_job_scenes(db_path, request.job_id)
+    if not scenes:
+        raise ValueError(f"Job has no scenes to download: {request.job_id}")
+
+    paths = resolve_download_paths(db_path, request)
+    paths.root.mkdir(parents=True, exist_ok=True)
+    update_search_job(
+        db_path,
+        request.job_id,
+        status="running",
+        result_count=job.result_count,
+        data_dir=str(paths.data_dir),
+        orbit_dir=str(paths.orbit_dir),
+        manifest_path=str(paths.manifest_path),
+        error_message=None,
+    )
+    record_job_event(
+        db_path,
+        request.job_id,
+        "info",
+        f"Download queued for {len(scenes)} scene(s) into {paths.root}",
+    )
+    return paths
+
+
+def execute_download_job(db_path: Path, request: DownloadJobRequest) -> None:
+    job = get_job(db_path, request.job_id)
+    if job is None:
+        return
+
+    paths = resolve_download_paths(db_path, request)
+    paths.root.mkdir(parents=True, exist_ok=True)
+
+    try:
+        scenes = list_job_scenes(db_path, request.job_id)
+        scene_ids = [scene["scene_id"] for scene in scenes]
+        if not scene_ids:
+            update_search_job(
+                db_path,
+                request.job_id,
+                status="failed",
+                result_count=0,
+                data_dir=str(paths.data_dir),
+                orbit_dir=str(paths.orbit_dir),
+                manifest_path=str(paths.manifest_path),
+                error_message="No scenes available for download",
+            )
+            record_job_event(db_path, request.job_id, "error", "Download job failed: no scenes available")
+            return
+
+        if not request.skip_data and not credentials_available(request.username, request.password):
+            message = (
+                "Download failed: Sentinel-1 product downloads require NASA Earthdata credentials. "
+                "Fill in Earthdata username/password, or set EARTHDATA_USER and EARTHDATA_PASS first."
+            )
+            for scene_id in scene_ids:
+                record_download_result(
+                    db_path,
+                    job_id=request.job_id,
+                    scene_id=scene_id,
+                    kind="product",
+                    status="failed",
+                    path=None,
+                    error_message=message,
+                )
+                record_download_result(
+                    db_path,
+                    job_id=request.job_id,
+                    scene_id=scene_id,
+                    kind="orbit",
+                    status="skipped",
+                    path=None,
+                )
+            update_search_job(
+                db_path,
+                request.job_id,
+                status="failed",
+                result_count=job.result_count,
+                data_dir=str(paths.data_dir),
+                orbit_dir=str(paths.orbit_dir),
+                manifest_path=str(paths.manifest_path),
+                error_message=message,
+            )
+            record_job_event(db_path, request.job_id, "error", message)
+            return
+
+        product_error: str | None = None
+        if request.skip_data:
+            record_job_event(db_path, request.job_id, "info", "Product download skipped by request")
+            record_product_skips(db_path, request.job_id, scene_ids)
+        else:
+            results = asf.granule_search(scene_ids)
+            products = {scene_name_from_product(product): product for product in results}
+            ordered_products = [products[scene_id] for scene_id in scene_ids if scene_id in products]
+            missing_scene_ids = [scene_id for scene_id in scene_ids if scene_id not in products]
+            if missing_scene_ids:
+                record_job_event(
+                    db_path,
+                    request.job_id,
+                    "warning",
+                    f"{len(missing_scene_ids)} scene(s) could not be reloaded from ASF search",
+                )
+                for scene_id in missing_scene_ids:
+                    record_download_result(
+                        db_path,
+                        job_id=request.job_id,
+                        scene_id=scene_id,
+                        kind="product",
+                        status="failed",
+                        path=None,
+                        error_message="Scene was not returned by ASF granule_search",
+                    )
+                    if request.skip_orbits:
+                        record_download_result(
+                            db_path,
+                            job_id=request.job_id,
+                            scene_id=scene_id,
+                            kind="orbit",
+                            status="skipped",
+                            path=None,
+                        )
+            paths.data_dir.mkdir(parents=True, exist_ok=True)
+            try:
+                session = build_session(username=request.username, password=request.password)
+                results.download(path=str(paths.data_dir), session=session, processes=request.processes)
+                record_job_event(
+                    db_path,
+                    request.job_id,
+                    "info",
+                    f"Product download finished into {paths.data_dir}",
+                )
+            except Exception as exc:
+                product_error = str(exc)
+                record_job_event(db_path, request.job_id, "error", f"Product download error: {exc}")
+            record_product_downloads(db_path, request.job_id, ordered_products, paths.data_dir, product_error)
+
+        orbit_failures = 0
+        if request.skip_orbits:
+            record_job_event(db_path, request.job_id, "info", "Orbit download skipped by request")
+            record_orbit_skips(db_path, request.job_id, scene_ids)
+        else:
+            paths.orbit_dir.mkdir(parents=True, exist_ok=True)
+            orbit_results = download_orbits(scene_ids, paths.orbit_dir)
+            orbit_failures = sum(1 for result in orbit_results if result.error)
+            for result in orbit_results:
+                record_download_result(
+                    db_path,
+                    job_id=request.job_id,
+                    scene_id=result.scene,
+                    kind="orbit",
+                    status="succeeded" if result.error is None else "failed",
+                    path=str(result.path) if result.path is not None else None,
+                    error_message=result.error,
+                )
+            record_job_event(
+                db_path,
+                request.job_id,
+                "info",
+                f"Orbit download finished: {len(orbit_results) - orbit_failures} ok, {orbit_failures} failed",
+            )
+
+        product_failures = count_download_failures(db_path, request.job_id, "product")
+        effective_orbit_failures = 0 if request.ignore_orbit_errors else orbit_failures
+        final_status = "succeeded"
+        if product_failures or effective_orbit_failures:
+            final_status = "partial_failed"
+        if product_failures and (request.skip_orbits or effective_orbit_failures == len(scene_ids)):
+            final_status = "failed"
+
+        update_search_job(
+            db_path,
+            request.job_id,
+            status=final_status,
+            result_count=job.result_count,
+            data_dir=str(paths.data_dir),
+            orbit_dir=str(paths.orbit_dir),
+            manifest_path=str(paths.manifest_path),
+            error_message=product_error,
+        )
+    except Exception as exc:
+        update_search_job(
+            db_path,
+            request.job_id,
+            status="failed",
+            result_count=job.result_count,
+            data_dir=str(paths.data_dir),
+            orbit_dir=str(paths.orbit_dir),
+            manifest_path=str(paths.manifest_path),
+            error_message=str(exc),
+        )
+        record_job_event(db_path, request.job_id, "error", f"Download execution failed: {exc}")
+
+
+def record_product_downloads(
+    db_path: Path,
+    job_id: int,
+    products: Sequence,
+    data_dir: Path | None,
+    fallback_error: str | None = None,
+) -> None:
+    for product in products:
+        scene_id = scene_name_from_product(product)
+        if scene_id is None:
+            continue
+        props = product.properties
+        if data_dir is None:
+            record_download_result(
+                db_path,
+                job_id=job_id,
+                scene_id=scene_id,
+                kind="product",
+                status="skipped",
+                path=None,
+                url=string_value(props.get("url")),
+                bytes_total=float(props["bytes"]) if props.get("bytes") is not None else None,
+                bytes_done=0,
+            )
+            continue
+
+        expected = expected_product_path(product, data_dir)
+        exists = expected.exists()
+        record_download_result(
+            db_path,
+            job_id=job_id,
+            scene_id=scene_id,
+            kind="product",
+            status="succeeded" if exists else "failed",
+            path=str(expected) if exists else None,
+            url=string_value(props.get("url")),
+            bytes_total=float(props["bytes"]) if props.get("bytes") is not None else None,
+            bytes_done=float(props["bytes"]) if exists and props.get("bytes") is not None else None,
+            error_message=None if exists else (fallback_error or "Downloaded file not found at expected path"),
+        )
+
+
+def record_product_skips(db_path: Path, job_id: int, scene_ids: Sequence[str]) -> None:
+    for scene_id in scene_ids:
+        record_download_result(
+            db_path,
+            job_id=job_id,
+            scene_id=scene_id,
+            kind="product",
+            status="skipped",
+            path=None,
+        )
+
+
+def record_orbit_skips(db_path: Path, job_id: int, scene_ids: Sequence[str]) -> None:
+    for scene_id in scene_ids:
+        record_download_result(
+            db_path,
+            job_id=job_id,
+            scene_id=scene_id,
+            kind="orbit",
+            status="skipped",
+            path=None,
+        )
+
+
+def expected_product_path(product, data_dir: Path) -> Path:
+    props = product.properties
+    file_name = props.get("fileName")
+    if file_name:
+        return data_dir / str(file_name)
+    url = props.get("url")
+    if url:
+        return data_dir / Path(str(url)).name
+    scene = scene_name_from_product(product) or "unknown_scene"
+    return data_dir / f"{scene}.zip"
+
+
+def string_value(value) -> str | None:
+    if value is None:
+        return None
+    return str(value)
+
+
+def count_download_failures(db_path: Path, job_id: int, kind: str) -> int:
+    from sentinel_orbit_downloader.storage.db import connect
+
+    if kind == "product":
+        column = "product_status"
+    elif kind == "orbit":
+        column = "orbit_status"
+    else:
+        raise ValueError(f"unsupported download kind: {kind}")
+
+    with connect(db_path) as connection:
+        row = connection.execute(
+            f"""
+            SELECT COUNT(*) AS failure_count
+            FROM job_scenes
+            WHERE job_id = ? AND {column} = 'failed'
+            """,
+            (job_id,),
+        ).fetchone()
+    return int(row["failure_count"])
diff --git a/src/sentinel_orbit_downloader/services/orbit_client.py b/src/sentinel_orbit_downloader/services/orbit_client.py
new file mode 100644
index 0000000..a07c621
--- /dev/null
+++ b/src/sentinel_orbit_downloader/services/orbit_client.py
@@ -0,0 +1,91 @@
+from __future__ import annotations
+
+import re
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Iterable, Sequence
+
+import s1_orbits
+from s1_orbits.exceptions import InvalidSceneError, OrbitNotFoundError
+
+SCENE_RE = re.compile(r"^(S1[A-D]_.+?)(?:\.SAFE|\.zip)?$", re.IGNORECASE)
+
+
+@dataclass(frozen=True)
+class OrbitResult:
+    scene: str
+    path: Path | None
+    error: str | None = None
+
+
+def normalize_scene_name(value: str) -> str | None:
+    name = Path(value).name.strip()
+    for suffix in (".SAFE", ".safe", ".ZIP", ".zip"):
+        if name.endswith(suffix):
+            name = name[: -len(suffix)]
+            break
+    match = SCENE_RE.match(name)
+    if not match:
+        return None
+    return match.group(1)
+
+
+def unique(values: Iterable[str]) -> list[str]:
+    seen = set()
+    output = []
+    for value in values:
+        if value in seen:
+            continue
+        seen.add(value)
+        output.append(value)
+    return output
+
+
+def collect_orbit_scenes(
+    scenes: Sequence[str] | None = None,
+    scene_file: Path | None = None,
+    data_dir: Path | None = None,
+) -> list[str]:
+    if scenes:
+        return unique(filter(None, (normalize_scene_name(scene) for scene in scenes)))
+
+    if scene_file:
+        scene_names = []
+        for line in scene_file.read_text(encoding="utf-8").splitlines():
+            clean = line.strip()
+            if not clean or clean.startswith("#"):
+                continue
+            scene_names.append(normalize_scene_name(clean))
+        return unique(filter(None, scene_names))
+
+    if not data_dir:
+        return []
+
+    found = []
+    for path in data_dir.iterdir():
+        if not path.name.upper().startswith(("S1A_", "S1B_", "S1C_", "S1D_")):
+            continue
+        scene = normalize_scene_name(path.name)
+        if scene:
+            found.append(scene)
+    return unique(found)
+
+
+def scene_names_from_results(results) -> list[str]:
+    from .asf_client import scene_name_from_product
+
+    scenes = [scene_name_from_product(product) for product in results]
+    return unique(scene for scene in scenes if scene)
+
+
+def download_orbits(scenes: Sequence[str], orbit_dir: Path) -> list[OrbitResult]:
+    orbit_dir.mkdir(parents=True, exist_ok=True)
+    results: list[OrbitResult] = []
+    for scene in scenes:
+        try:
+            path = s1_orbits.fetch_for_scene(scene, dir=orbit_dir)
+            results.append(OrbitResult(scene=scene, path=path))
+        except (InvalidSceneError, OrbitNotFoundError) as exc:
+            message = str(exc) or exc.__class__.__name__
+            results.append(OrbitResult(scene=scene, path=None, error=message))
+    return results
diff --git a/src/sentinel_orbit_downloader/services/project_store.py b/src/sentinel_orbit_downloader/services/project_store.py
new file mode 100644
index 0000000..dfde788
--- /dev/null
+++ b/src/sentinel_orbit_downloader/services/project_store.py
@@ -0,0 +1,545 @@
+from __future__ import annotations
+
+import json
+import re
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+from sentinel_orbit_downloader.storage.db import connect
+
+
+NON_SLUG_RE = re.compile(r"[^\w\u4e00-\u9fff-]+", re.UNICODE)
+
+
+@dataclass(frozen=True)
+class ProjectRecord:
+    id: int
+    name: str
+    slug: str
+    data_root: str
+    description: str | None
+    created_at: str
+    updated_at: str
+
+
+def create_project(
+    db_path: Path,
+    name: str,
+    data_root: Path,
+    description: str | None = None,
+    slug: str | None = None,
+) -> ProjectRecord:
+    final_slug = slug or slugify(name)
+    if not final_slug:
+        raise ValueError("project slug is empty; choose a clearer project name")
+
+    data_root.mkdir(parents=True, exist_ok=True)
+
+    with connect(db_path) as connection:
+        exists = connection.execute("SELECT id FROM projects WHERE slug = ?", (final_slug,)).fetchone()
+        if exists is not None:
+            raise ValueError(f"project slug already exists: {final_slug}")
+
+        cursor = connection.execute(
+            """
+            INSERT INTO projects(name, slug, data_root, description)
+            VALUES (?, ?, ?, ?)
+            """,
+            (name, final_slug, str(data_root), description),
+        )
+        project_id = int(cursor.lastrowid)
+        row = connection.execute("SELECT * FROM projects WHERE id = ?", (project_id,)).fetchone()
+
+    return row_to_project(row)
+
+
+def list_projects(db_path: Path) -> list[ProjectRecord]:
+    with connect(db_path) as connection:
+        rows = connection.execute(
+            "SELECT * FROM projects ORDER BY created_at DESC, id DESC"
+        ).fetchall()
+    return [row_to_project(row) for row in rows]
+
+
+def get_project(db_path: Path, project_id: int) -> ProjectRecord | None:
+    with connect(db_path) as connection:
+        row = connection.execute("SELECT * FROM projects WHERE id = ?", (project_id,)).fetchone()
+    if row is None:
+        return None
+    return row_to_project(row)
+
+
+def slugify(value: str) -> str:
+    text = value.strip().lower().replace(" ", "-")
+    text = NON_SLUG_RE.sub("-", text)
+    text = re.sub(r"-{2,}", "-", text)
+    text = text.strip("-")
+    return text
+
+
+def row_to_project(row) -> ProjectRecord:
+    return ProjectRecord(
+        id=int(row["id"]),
+        name=str(row["name"]),
+        slug=str(row["slug"]),
+        data_root=str(row["data_root"]),
+        description=row["description"],
+        created_at=str(row["created_at"]),
+        updated_at=str(row["updated_at"]),
+    )
+
+
+@dataclass(frozen=True)
+class SearchJobRecord:
+    id: int
+    project_id: int | None
+    aoi_id: int | None
+    source_type: str
+    source_value: str | None
+    region_adcode: str | None
+    region_name: str | None
+    start_time: str
+    end_time: str
+    processing_level: str
+    beam_mode: str | None
+    flight_direction: str | None
+    polarization: str | None
+    relative_orbit: int | None
+    max_results: int
+    status: str
+    result_count: int | None
+    data_dir: str | None
+    orbit_dir: str | None
+    manifest_path: str | None
+    error_message: str | None
+    created_at: str
+    finished_at: str | None
+
+
+def create_search_job(
+    db_path: Path,
+    *,
+    project_id: int | None,
+    source_type: str,
+    source_value: str | None,
+    region_adcode: str | None,
+    region_name: str | None,
+    start_time: str,
+    end_time: str,
+    processing_level: str,
+    beam_mode: str | None,
+    flight_direction: str | None,
+    polarization: str | None,
+    relative_orbit: int | None,
+    max_results: int,
+    status: str = "running",
+    data_dir: str | None = None,
+    orbit_dir: str | None = None,
+    manifest_path: str | None = None,
+) -> SearchJobRecord:
+    with connect(db_path) as connection:
+        cursor = connection.execute(
+            """
+            INSERT INTO search_jobs(
+                project_id, aoi_id, source_type, source_value, region_adcode, region_name,
+                start_time, end_time, processing_level, beam_mode, flight_direction,
+                polarization, relative_orbit, max_results, status, data_dir, orbit_dir, manifest_path
+            )
+            VALUES (?, NULL, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+            """,
+            (
+                project_id,
+                source_type,
+                source_value,
+                region_adcode,
+                region_name,
+                start_time,
+                end_time,
+                processing_level,
+                beam_mode,
+                flight_direction,
+                polarization,
+                relative_orbit,
+                max_results,
+                status,
+                data_dir,
+                orbit_dir,
+                manifest_path,
+            ),
+        )
+        job_id = int(cursor.lastrowid)
+        row = connection.execute("SELECT * FROM search_jobs WHERE id = ?", (job_id,)).fetchone()
+    return row_to_search_job(row)
+
+
+def update_search_job(
+    db_path: Path,
+    job_id: int,
+    *,
+    status: str,
+    result_count: int | None = None,
+    data_dir: str | None = None,
+    orbit_dir: str | None = None,
+    manifest_path: str | None = None,
+    error_message: str | None = None,
+) -> None:
+    final_statuses = {"succeeded", "failed", "partial_failed", "canceled"}
+    with connect(db_path) as connection:
+        if status in final_statuses:
+            connection.execute(
+                """
+                UPDATE search_jobs
+                SET
+                    status = ?,
+                    result_count = COALESCE(?, result_count),
+                    data_dir = COALESCE(?, data_dir),
+                    orbit_dir = COALESCE(?, orbit_dir),
+                    manifest_path = COALESCE(?, manifest_path),
+                    error_message = ?,
+                    finished_at = CURRENT_TIMESTAMP
+                WHERE id = ?
+                """,
+                (
+                    status,
+                    result_count,
+                    data_dir,
+                    orbit_dir,
+                    manifest_path,
+                    error_message,
+                    job_id,
+                ),
+            )
+        else:
+            connection.execute(
+                """
+                UPDATE search_jobs
+                SET
+                    status = ?,
+                    result_count = COALESCE(?, result_count),
+                    data_dir = COALESCE(?, data_dir),
+                    orbit_dir = COALESCE(?, orbit_dir),
+                    manifest_path = COALESCE(?, manifest_path),
+                    error_message = ?,
+                    finished_at = NULL
+                WHERE id = ?
+                """,
+                (
+                    status,
+                    result_count,
+                    data_dir,
+                    orbit_dir,
+                    manifest_path,
+                    error_message,
+                    job_id,
+                ),
+            )
+
+
+def record_job_event(db_path: Path, job_id: int, level: str, message: str) -> None:
+    with connect(db_path) as connection:
+        if not job_exists(connection, job_id):
+            return
+        connection.execute(
+            "INSERT INTO job_events(job_id, level, message) VALUES (?, ?, ?)",
+            (job_id, level, message),
+        )
+
+
+def save_query_results(db_path: Path, job_id: int, results) -> None:
+    with connect(db_path) as connection:
+        if not job_exists(connection, job_id):
+            return
+        for product in results:
+            scene_id = scene_id_from_product(product)
+            if scene_id is None:
+                continue
+            props = product.properties
+            geometry_json = json.dumps(product.geometry, ensure_ascii=False, default=str)
+            properties_json = json.dumps(props, ensure_ascii=False, default=str)
+            connection.execute(
+                """
+                INSERT INTO scenes(
+                    scene_id, platform, start_time, stop_time, processing_level, beam_mode,
+                    flight_direction, polarization, relative_orbit, size_bytes, size_mb,
+                    download_url, geometry_json, properties_json
+                )
+                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+                ON CONFLICT(scene_id) DO UPDATE SET
+                    platform = excluded.platform,
+                    start_time = excluded.start_time,
+                    stop_time = excluded.stop_time,
+                    processing_level = excluded.processing_level,
+                    beam_mode = excluded.beam_mode,
+                    flight_direction = excluded.flight_direction,
+                    polarization = excluded.polarization,
+                    relative_orbit = excluded.relative_orbit,
+                    size_bytes = excluded.size_bytes,
+                    size_mb = excluded.size_mb,
+                    download_url = excluded.download_url,
+                    geometry_json = excluded.geometry_json,
+                    properties_json = excluded.properties_json
+                """,
+                (
+                    scene_id,
+                    platform_from_scene(scene_id),
+                    string_value(props.get("startTime")),
+                    string_value(props.get("stopTime")),
+                    string_value(props.get("processingLevel")),
+                    string_value(props.get("beamModeType")),
+                    string_value(props.get("flightDirection")),
+                    string_value(props.get("polarization")),
+                    int(props["pathNumber"]) if props.get("pathNumber") is not None else None,
+                    float(props["bytes"]) if props.get("bytes") is not None else None,
+                    product_size_mb(props),
+                    string_value(props.get("url")),
+                    geometry_json,
+                    properties_json,
+                ),
+            )
+            connection.execute(
+                """
+                INSERT INTO job_scenes(job_id, scene_id, selected, product_status, orbit_status)
+                VALUES (?, ?, 1, 'pending', 'pending')
+                ON CONFLICT(job_id, scene_id) DO NOTHING
+                """,
+                (job_id, scene_id),
+            )
+
+
+def record_download_result(
+    db_path: Path,
+    *,
+    job_id: int,
+    scene_id: str,
+    kind: str,
+    status: str,
+    path: str | None,
+    url: str | None = None,
+    bytes_total: float | None = None,
+    bytes_done: float | None = None,
+    error_message: str | None = None,
+) -> None:
+    with connect(db_path) as connection:
+        if not job_exists(connection, job_id):
+            return
+        connection.execute(
+            """
+            INSERT INTO downloads(
+                job_id, scene_id, kind, status, url, path, bytes_total, bytes_done, error_message
+            )
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
+            """,
+            (
+                job_id,
+                scene_id,
+                kind,
+                status,
+                url,
+                path,
+                bytes_total,
+                bytes_done,
+                error_message,
+            ),
+        )
+        if kind == "product":
+            connection.execute(
+                """
+                UPDATE job_scenes
+                SET product_status = ?, product_path = COALESCE(?, product_path)
+                WHERE job_id = ? AND scene_id = ?
+                """,
+                (status, path, job_id, scene_id),
+            )
+        elif kind == "orbit":
+            connection.execute(
+                """
+                UPDATE job_scenes
+                SET orbit_status = ?, orbit_path = COALESCE(?, orbit_path)
+                WHERE job_id = ? AND scene_id = ?
+                """,
+                (status, path, job_id, scene_id),
+            )
+
+
+def delete_job(db_path: Path, job_id: int) -> bool:
+    with connect(db_path) as connection:
+        if not job_exists(connection, job_id):
+            return False
+        delete_job_rows(connection, job_id)
+        prune_orphan_scenes(connection)
+    return True
+
+
+def clear_jobs(
+    db_path: Path,
+    project_id: int | None = None,
+    include_running: bool = False,
+) -> list[int]:
+    sql = "SELECT id FROM search_jobs"
+    conditions: list[str] = []
+    params: list[Any] = []
+
+    if project_id is not None:
+        conditions.append("project_id = ?")
+        params.append(project_id)
+    if not include_running:
+        conditions.append("status != 'running'")
+
+    if conditions:
+        sql += " WHERE " + " AND ".join(conditions)
+    sql += " ORDER BY id"
+
+    with connect(db_path) as connection:
+        rows = connection.execute(sql, params).fetchall()
+        job_ids = [int(row["id"]) for row in rows]
+        for job_id in job_ids:
+            delete_job_rows(connection, job_id)
+        prune_orphan_scenes(connection)
+    return job_ids
+
+
+def list_jobs(db_path: Path, project_id: int | None = None, limit: int = 20) -> list[SearchJobRecord]:
+    sql = """
+    SELECT *
+    FROM search_jobs
+    """
+    params: list[Any] = []
+    if project_id is not None:
+        sql += " WHERE project_id = ?"
+        params.append(project_id)
+    sql += " ORDER BY id DESC LIMIT ?"
+    params.append(limit)
+
+    with connect(db_path) as connection:
+        rows = connection.execute(sql, params).fetchall()
+    return [row_to_search_job(row) for row in rows]
+
+
+def get_job(db_path: Path, job_id: int) -> SearchJobRecord | None:
+    with connect(db_path) as connection:
+        row = connection.execute("SELECT * FROM search_jobs WHERE id = ?", (job_id,)).fetchone()
+    if row is None:
+        return None
+    return row_to_search_job(row)
+
+
+def list_job_scenes(db_path: Path, job_id: int) -> list[dict[str, Any]]:
+    with connect(db_path) as connection:
+        rows = connection.execute(
+            """
+            SELECT
+                js.job_id,
+                js.scene_id,
+                js.selected,
+                js.product_status,
+                js.orbit_status,
+                js.product_path,
+                js.orbit_path,
+                s.platform,
+                s.start_time,
+                s.stop_time,
+                s.processing_level,
+                s.flight_direction,
+                s.relative_orbit,
+                s.size_mb
+            FROM job_scenes AS js
+            JOIN scenes AS s ON s.scene_id = js.scene_id
+            WHERE js.job_id = ?
+            ORDER BY s.start_time, js.scene_id
+            """,
+            (job_id,),
+        ).fetchall()
+    return [dict(row) for row in rows]
+
+
+def list_job_events(db_path: Path, job_id: int) -> list[dict[str, Any]]:
+    with connect(db_path) as connection:
+        rows = connection.execute(
+            "SELECT id, level, message, created_at FROM job_events WHERE job_id = ? ORDER BY id",
+            (job_id,),
+        ).fetchall()
+    return [dict(row) for row in rows]
+
+
+def row_to_search_job(row) -> SearchJobRecord:
+    return SearchJobRecord(
+        id=int(row["id"]),
+        project_id=int(row["project_id"]) if row["project_id"] is not None else None,
+        aoi_id=int(row["aoi_id"]) if row["aoi_id"] is not None else None,
+        source_type=str(row["source_type"]),
+        source_value=row["source_value"],
+        region_adcode=row["region_adcode"],
+        region_name=row["region_name"],
+        start_time=str(row["start_time"]),
+        end_time=str(row["end_time"]),
+        processing_level=str(row["processing_level"]),
+        beam_mode=row["beam_mode"],
+        flight_direction=row["flight_direction"],
+        polarization=row["polarization"],
+        relative_orbit=int(row["relative_orbit"]) if row["relative_orbit"] is not None else None,
+        max_results=int(row["max_results"]),
+        status=str(row["status"]),
+        result_count=int(row["result_count"]) if row["result_count"] is not None else None,
+        data_dir=row["data_dir"],
+        orbit_dir=row["orbit_dir"],
+        manifest_path=row["manifest_path"],
+        error_message=row["error_message"],
+        created_at=str(row["created_at"]),
+        finished_at=row["finished_at"],
+    )
+
+
+def scene_id_from_product(product) -> str | None:
+    from sentinel_orbit_downloader.services.asf_client import scene_name_from_product
+
+    return scene_name_from_product(product)
+
+
+def platform_from_scene(scene_id: str) -> str | None:
+    parts = scene_id.split("_", 1)
+    if not parts:
+        return None
+    return parts[0]
+
+
+def product_size_mb(props: dict[str, Any]) -> float | None:
+    if props.get("sizeMB") is not None:
+        return float(props["sizeMB"])
+    if props.get("bytes") is not None:
+        return float(props["bytes"]) / (1024 * 1024)
+    return None
+
+
+def string_value(value: Any) -> str | None:
+    if value is None:
+        return None
+    return str(value)
+
+
+def job_exists(connection, job_id: int) -> bool:
+    row = connection.execute(
+        "SELECT 1 FROM search_jobs WHERE id = ?",
+        (job_id,),
+    ).fetchone()
+    return row is not None
+
+
+def delete_job_rows(connection, job_id: int) -> None:
+    connection.execute("DELETE FROM job_events WHERE job_id = ?", (job_id,))
+    connection.execute("DELETE FROM downloads WHERE job_id = ?", (job_id,))
+    connection.execute("DELETE FROM job_scenes WHERE job_id = ?", (job_id,))
+    connection.execute("DELETE FROM search_jobs WHERE id = ?", (job_id,))
+
+
+def prune_orphan_scenes(connection) -> None:
+    connection.execute(
+        """
+        DELETE FROM scenes
+        WHERE NOT EXISTS (
+            SELECT 1
+            FROM job_scenes
+            WHERE job_scenes.scene_id = scenes.scene_id
+        )
+        """
+    )
diff --git a/src/sentinel_orbit_downloader/services/region_catalog.py b/src/sentinel_orbit_downloader/services/region_catalog.py
new file mode 100644
index 0000000..33ffe00
--- /dev/null
+++ b/src/sentinel_orbit_downloader/services/region_catalog.py
@@ -0,0 +1,285 @@
+from __future__ import annotations
+
+import hashlib
+import json
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+from shapely.geometry import shape
+
+from sentinel_orbit_downloader.core.provinces import PROVINCES
+from sentinel_orbit_downloader.storage.db import connect, set_setting
+
+
+@dataclass(frozen=True)
+class RegionImportStats:
+    source_path: Path
+    simplify_tolerance: float
+    total_features: int
+    imported: int
+
+
+@dataclass(frozen=True)
+class RegionRecord:
+    adcode: str
+    name: str
+    level: str
+    parent_adcode: str | None
+    parent_name: str | None
+    province_adcode: str | None
+    province_name: str | None
+    center_lon: float | None
+    center_lat: float | None
+    centroid_lon: float | None
+    centroid_lat: float | None
+    min_lon: float | None
+    min_lat: float | None
+    max_lon: float | None
+    max_lat: float | None
+    children_num: int | None
+    tree_id: str | None
+    source_path: str | None
+    geometry_json: str
+    wkt: str
+    simplified_wkt: str
+    simplify_tolerance: float
+    geometry_hash: str
+
+    @property
+    def bbox(self) -> tuple[float, float, float, float] | None:
+        values = (self.min_lon, self.min_lat, self.max_lon, self.max_lat)
+        if any(value is None for value in values):
+            return None
+        return values  # type: ignore[return-value]
+
+    @property
+    def label(self) -> str:
+        parts = []
+        if self.province_name and self.province_name != self.name:
+            parts.append(self.province_name)
+        if self.parent_name and self.parent_name not in parts and self.parent_name != self.name:
+            parts.append(self.parent_name)
+        parts.append(self.name)
+        return " / ".join(parts)
+
+
+def import_regions(
+    db_path: Path,
+    source_path: Path,
+    simplify_tolerance: float = 0.01,
+) -> RegionImportStats:
+    data = json.loads(source_path.read_text(encoding="utf-8"))
+    features = data.get("features") or []
+    rows = [feature_to_row(feature, source_path, simplify_tolerance) for feature in features]
+
+    with connect(db_path) as connection:
+        connection.execute("DELETE FROM regions")
+        connection.executemany(
+            """
+            INSERT INTO regions (
+                adcode, name, level, parent_adcode, province_adcode, province_name,
+                center_lon, center_lat, centroid_lon, centroid_lat,
+                min_lon, min_lat, max_lon, max_lat, children_num, tree_id,
+                source_path, geometry_json, wkt, simplified_wkt, simplify_tolerance, geometry_hash
+            )
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+            """,
+            rows,
+        )
+        set_setting(connection, "regions.source_path", str(source_path.resolve()))
+        set_setting(connection, "regions.simplify_tolerance", str(simplify_tolerance))
+        set_setting(connection, "regions.feature_count", str(len(features)))
+
+    return RegionImportStats(
+        source_path=source_path,
+        simplify_tolerance=simplify_tolerance,
+        total_features=len(features),
+        imported=len(rows),
+    )
+
+
+def search_regions(
+    db_path: Path,
+    query: str,
+    limit: int = 20,
+    level: str | None = None,
+) -> list[RegionRecord]:
+    sql = """
+    SELECT
+        r.*,
+        parent.name AS parent_name
+    FROM regions AS r
+    LEFT JOIN regions AS parent ON parent.adcode = r.parent_adcode
+    WHERE (
+        r.name LIKE :like_query
+        OR r.adcode LIKE :like_query
+        OR IFNULL(r.province_name, '') LIKE :like_query
+    )
+    """
+    params: dict[str, Any] = {
+        "like_query": f"%{query}%",
+        "exact_query": query,
+        "prefix_query": f"{query}%",
+        "limit": limit,
+    }
+    if level:
+        sql += " AND r.level = :level"
+        params["level"] = level
+
+    sql += """
+    ORDER BY
+        CASE
+            WHEN r.name = :exact_query THEN 0
+            WHEN r.name LIKE :prefix_query THEN 1
+            ELSE 2
+        END,
+        LENGTH(r.name),
+        r.level,
+        r.adcode
+    LIMIT :limit
+    """
+
+    with connect(db_path) as connection:
+        rows = connection.execute(sql, params).fetchall()
+    return [row_to_region(row) for row in rows]
+
+
+def get_region(db_path: Path, adcode: str) -> RegionRecord | None:
+    with connect(db_path) as connection:
+        row = connection.execute(
+            """
+            SELECT
+                r.*,
+                parent.name AS parent_name
+            FROM regions AS r
+            LEFT JOIN regions AS parent ON parent.adcode = r.parent_adcode
+            WHERE r.adcode = ?
+            """,
+            (str(adcode),),
+        ).fetchone()
+    if row is None:
+        return None
+    return row_to_region(row)
+
+
+def region_wkt(db_path: Path, adcode: str, simplified: bool = True) -> str:
+    region = get_region(db_path, adcode)
+    if region is None:
+        raise ValueError(f"region not found: {adcode}")
+    return region.simplified_wkt if simplified else region.wkt
+
+
+def feature_to_row(feature: dict[str, Any], source_path: Path, simplify_tolerance: float) -> tuple[Any, ...]:
+    properties = feature.get("properties") or {}
+    geometry = feature.get("geometry")
+    if geometry is None:
+        raise ValueError("feature geometry is missing")
+
+    geometry_text = json.dumps(geometry, ensure_ascii=False, separators=(",", ":"), sort_keys=True)
+    geometry_hash = hashlib.sha256(geometry_text.encode("utf-8")).hexdigest()
+    geom = shape(geometry)
+    simplified = geom.simplify(simplify_tolerance, preserve_topology=True)
+    if simplified.is_empty:
+        simplified = geom
+
+    adcode = str(properties.get("adcode"))
+    name = str(properties.get("name"))
+    level = str(properties.get("level") or "unknown")
+    parent_adcode = normalize_adcode((properties.get("parent") or {}).get("adcode"))
+    province_adcode = derive_province_adcode(adcode, level, parent_adcode, properties.get("acroutes"))
+    province_name = PROVINCES.get(province_adcode) if province_adcode else None
+
+    center = normalize_point(properties.get("center"))
+    centroid = normalize_point(properties.get("centroid"))
+    min_lon, min_lat, max_lon, max_lat = geom.bounds
+
+    return (
+        adcode,
+        name,
+        level,
+        parent_adcode,
+        province_adcode,
+        province_name,
+        center[0] if center else None,
+        center[1] if center else None,
+        centroid[0] if centroid else None,
+        centroid[1] if centroid else None,
+        min_lon,
+        min_lat,
+        max_lon,
+        max_lat,
+        int(properties["childrenNum"]) if properties.get("childrenNum") is not None else None,
+        properties.get("treeID"),
+        str(source_path),
+        geometry_text,
+        geom.wkt,
+        simplified.wkt,
+        simplify_tolerance,
+        geometry_hash,
+    )
+
+
+def derive_province_adcode(
+    adcode: str,
+    level: str,
+    parent_adcode: str | None,
+    acroutes: Any,
+) -> str | None:
+    if level == "province" and adcode in PROVINCES:
+        return adcode
+
+    routes = [normalize_adcode(value) for value in acroutes or []]
+    for route in routes:
+        if route in PROVINCES:
+            return route
+
+    if parent_adcode in PROVINCES:
+        return parent_adcode
+
+    if adcode.isdigit() and len(adcode) == 6:
+        candidate = f"{adcode[:2]}0000"
+        if candidate in PROVINCES:
+            return candidate
+    return None
+
+
+def normalize_adcode(value: Any) -> str | None:
+    if value is None:
+        return None
+    text = str(value)
+    return text if text else None
+
+
+def normalize_point(value: Any) -> tuple[float, float] | None:
+    if not isinstance(value, list) or len(value) < 2:
+        return None
+    return (float(value[0]), float(value[1]))
+
+
+def row_to_region(row) -> RegionRecord:
+    return RegionRecord(
+        adcode=str(row["adcode"]),
+        name=str(row["name"]),
+        level=str(row["level"]),
+        parent_adcode=row["parent_adcode"],
+        parent_name=row["parent_name"],
+        province_adcode=row["province_adcode"],
+        province_name=row["province_name"],
+        center_lon=row["center_lon"],
+        center_lat=row["center_lat"],
+        centroid_lon=row["centroid_lon"],
+        centroid_lat=row["centroid_lat"],
+        min_lon=row["min_lon"],
+        min_lat=row["min_lat"],
+        max_lon=row["max_lon"],
+        max_lat=row["max_lat"],
+        children_num=row["children_num"],
+        tree_id=row["tree_id"],
+        source_path=row["source_path"],
+        geometry_json=row["geometry_json"],
+        wkt=row["wkt"],
+        simplified_wkt=row["simplified_wkt"],
+        simplify_tolerance=float(row["simplify_tolerance"]),
+        geometry_hash=str(row["geometry_hash"]),
+    )
diff --git a/src/sentinel_orbit_downloader/services/settings_store.py b/src/sentinel_orbit_downloader/services/settings_store.py
new file mode 100644
index 0000000..30ebbf1
--- /dev/null
+++ b/src/sentinel_orbit_downloader/services/settings_store.py
@@ -0,0 +1,145 @@
+from __future__ import annotations
+
+import base64
+import ctypes
+from dataclasses import dataclass
+from pathlib import Path
+
+from sentinel_orbit_downloader.storage.db import connect, get_setting, set_setting
+
+
+EARTHDATA_USERNAME_KEY = "earthdata.username"
+EARTHDATA_PASSWORD_KEY = "earthdata.password_dpapi"
+
+
+@dataclass(frozen=True)
+class EarthdataSettings:
+    username: str | None
+    has_password: bool
+
+
+def get_earthdata_settings(db_path: Path) -> EarthdataSettings:
+    with connect(db_path) as connection:
+        username = get_setting(connection, EARTHDATA_USERNAME_KEY)
+        encrypted_password = get_setting(connection, EARTHDATA_PASSWORD_KEY)
+    return EarthdataSettings(
+        username=username,
+        has_password=bool(encrypted_password),
+    )
+
+
+def get_saved_earthdata_credentials(db_path: Path) -> tuple[str | None, str | None]:
+    with connect(db_path) as connection:
+        username = get_setting(connection, EARTHDATA_USERNAME_KEY)
+        encrypted_password = get_setting(connection, EARTHDATA_PASSWORD_KEY)
+    if not encrypted_password:
+        return username, None
+    return username, dpapi_decrypt(encrypted_password)
+
+
+def save_earthdata_credentials(db_path: Path, username: str, password: str) -> EarthdataSettings:
+    final_username = username.strip()
+    if not final_username:
+        raise ValueError("Earthdata username cannot be empty")
+    if not password:
+        raise ValueError("Earthdata password cannot be empty")
+
+    encrypted_password = dpapi_encrypt(password)
+    with connect(db_path) as connection:
+        set_setting(connection, EARTHDATA_USERNAME_KEY, final_username)
+        set_setting(connection, EARTHDATA_PASSWORD_KEY, encrypted_password)
+    return EarthdataSettings(username=final_username, has_password=True)
+
+
+def clear_earthdata_credentials(db_path: Path) -> None:
+    with connect(db_path) as connection:
+        connection.execute(
+            "DELETE FROM settings WHERE key IN (?, ?)",
+            (EARTHDATA_USERNAME_KEY, EARTHDATA_PASSWORD_KEY),
+        )
+
+
+class DATA_BLOB(ctypes.Structure):
+    _fields_ = [
+        ("cbData", ctypes.c_uint32),
+        ("pbData", ctypes.POINTER(ctypes.c_ubyte)),
+    ]
+
+
+try:
+    kernel32 = ctypes.windll.kernel32
+    crypt32 = ctypes.windll.crypt32
+except AttributeError:
+    kernel32 = None
+    crypt32 = None
+
+
+CRYPTPROTECT_UI_FORBIDDEN = 0x01
+
+
+def dpapi_encrypt(value: str) -> str:
+    ensure_windows_dpapi()
+    raw = value.encode("utf-8")
+    in_blob = bytes_to_blob(raw)
+    out_blob = DATA_BLOB()
+    if not crypt32.CryptProtectData(
+        ctypes.byref(in_blob),
+        "sentinel-orbit-downloader",
+        None,
+        None,
+        None,
+        CRYPTPROTECT_UI_FORBIDDEN,
+        ctypes.byref(out_blob),
+    ):
+        raise ctypes.WinError()
+    try:
+        encrypted = blob_to_bytes(out_blob)
+    finally:
+        free_blob(out_blob)
+    return base64.b64encode(encrypted).decode("ascii")
+
+
+def dpapi_decrypt(encoded_value: str) -> str:
+    ensure_windows_dpapi()
+    encrypted = base64.b64decode(encoded_value.encode("ascii"))
+    in_blob = bytes_to_blob(encrypted)
+    out_blob = DATA_BLOB()
+    if not crypt32.CryptUnprotectData(
+        ctypes.byref(in_blob),
+        None,
+        None,
+        None,
+        None,
+        CRYPTPROTECT_UI_FORBIDDEN,
+        ctypes.byref(out_blob),
+    ):
+        raise ctypes.WinError()
+    try:
+        decrypted = blob_to_bytes(out_blob)
+    finally:
+        free_blob(out_blob)
+    return decrypted.decode("utf-8")
+
+
+def ensure_windows_dpapi() -> None:
+    if crypt32 is None or kernel32 is None:
+        raise RuntimeError("Earthdata local credential storage currently requires Windows")
+
+
+def bytes_to_blob(value: bytes) -> DATA_BLOB:
+    if not value:
+        buffer = (ctypes.c_ubyte * 1)()
+        return DATA_BLOB(0, ctypes.cast(buffer, ctypes.POINTER(ctypes.c_ubyte)))
+    buffer = (ctypes.c_ubyte * len(value)).from_buffer_copy(value)
+    return DATA_BLOB(len(value), ctypes.cast(buffer, ctypes.POINTER(ctypes.c_ubyte)))
+
+
+def blob_to_bytes(blob: DATA_BLOB) -> bytes:
+    if not blob.cbData or not blob.pbData:
+        return b""
+    return bytes(ctypes.string_at(blob.pbData, blob.cbData))
+
+
+def free_blob(blob: DATA_BLOB) -> None:
+    if blob.pbData:
+        kernel32.LocalFree(blob.pbData)
diff --git a/src/sentinel_orbit_downloader/storage/__init__.py b/src/sentinel_orbit_downloader/storage/__init__.py
new file mode 100644
index 0000000..0da8c4f
--- /dev/null
+++ b/src/sentinel_orbit_downloader/storage/__init__.py
@@ -0,0 +1 @@
+"""Storage layer."""
diff --git a/src/sentinel_orbit_downloader/storage/db.py b/src/sentinel_orbit_downloader/storage/db.py
new file mode 100644
index 0000000..8acdead
--- /dev/null
+++ b/src/sentinel_orbit_downloader/storage/db.py
@@ -0,0 +1,193 @@
+from __future__ import annotations
+
+import sqlite3
+from pathlib import Path
+
+
+SCHEMA = """
+CREATE TABLE IF NOT EXISTS settings (
+    key TEXT PRIMARY KEY,
+    value TEXT NOT NULL,
+    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS regions (
+    adcode TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    level TEXT NOT NULL,
+    parent_adcode TEXT,
+    province_adcode TEXT,
+    province_name TEXT,
+    center_lon REAL,
+    center_lat REAL,
+    centroid_lon REAL,
+    centroid_lat REAL,
+    min_lon REAL,
+    min_lat REAL,
+    max_lon REAL,
+    max_lat REAL,
+    children_num INTEGER,
+    tree_id TEXT,
+    source_path TEXT,
+    geometry_json TEXT NOT NULL,
+    wkt TEXT NOT NULL,
+    simplified_wkt TEXT NOT NULL,
+    simplify_tolerance REAL NOT NULL,
+    geometry_hash TEXT NOT NULL,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX IF NOT EXISTS idx_regions_name ON regions(name);
+CREATE INDEX IF NOT EXISTS idx_regions_level ON regions(level);
+CREATE INDEX IF NOT EXISTS idx_regions_parent ON regions(parent_adcode);
+CREATE INDEX IF NOT EXISTS idx_regions_province ON regions(province_adcode);
+
+CREATE TABLE IF NOT EXISTS projects (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL,
+    slug TEXT NOT NULL UNIQUE,
+    data_root TEXT NOT NULL,
+    description TEXT,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS aois (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    project_id INTEGER,
+    name TEXT NOT NULL,
+    source_type TEXT NOT NULL,
+    region_adcode TEXT,
+    wkt TEXT NOT NULL,
+    bbox_json TEXT,
+    geometry_json TEXT,
+    simplification_tolerance REAL,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY(project_id) REFERENCES projects(id)
+);
+
+CREATE TABLE IF NOT EXISTS search_jobs (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    project_id INTEGER,
+    aoi_id INTEGER,
+    source_type TEXT NOT NULL,
+    source_value TEXT,
+    region_adcode TEXT,
+    region_name TEXT,
+    start_time TEXT NOT NULL,
+    end_time TEXT NOT NULL,
+    processing_level TEXT NOT NULL,
+    beam_mode TEXT,
+    flight_direction TEXT,
+    polarization TEXT,
+    relative_orbit INTEGER,
+    max_results INTEGER NOT NULL,
+    status TEXT NOT NULL,
+    result_count INTEGER,
+    data_dir TEXT,
+    orbit_dir TEXT,
+    manifest_path TEXT,
+    error_message TEXT,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    finished_at TEXT,
+    FOREIGN KEY(project_id) REFERENCES projects(id),
+    FOREIGN KEY(aoi_id) REFERENCES aois(id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_search_jobs_project ON search_jobs(project_id);
+CREATE INDEX IF NOT EXISTS idx_search_jobs_created ON search_jobs(created_at);
+CREATE INDEX IF NOT EXISTS idx_search_jobs_region ON search_jobs(region_adcode);
+
+CREATE TABLE IF NOT EXISTS scenes (
+    scene_id TEXT PRIMARY KEY,
+    platform TEXT,
+    start_time TEXT,
+    stop_time TEXT,
+    processing_level TEXT,
+    beam_mode TEXT,
+    flight_direction TEXT,
+    polarization TEXT,
+    relative_orbit INTEGER,
+    size_bytes REAL,
+    size_mb REAL,
+    download_url TEXT,
+    geometry_json TEXT,
+    properties_json TEXT NOT NULL,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS job_scenes (
+    job_id INTEGER NOT NULL,
+    scene_id TEXT NOT NULL,
+    selected INTEGER NOT NULL DEFAULT 1,
+    product_status TEXT NOT NULL DEFAULT 'pending',
+    orbit_status TEXT NOT NULL DEFAULT 'pending',
+    product_path TEXT,
+    orbit_path TEXT,
+    PRIMARY KEY(job_id, scene_id),
+    FOREIGN KEY(job_id) REFERENCES search_jobs(id),
+    FOREIGN KEY(scene_id) REFERENCES scenes(scene_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_job_scenes_scene ON job_scenes(scene_id);
+
+CREATE TABLE IF NOT EXISTS downloads (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    job_id INTEGER NOT NULL,
+    scene_id TEXT NOT NULL,
+    kind TEXT NOT NULL,
+    status TEXT NOT NULL,
+    url TEXT,
+    path TEXT,
+    bytes_total REAL,
+    bytes_done REAL,
+    attempt_count INTEGER NOT NULL DEFAULT 1,
+    error_message TEXT,
+    started_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    finished_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY(job_id) REFERENCES search_jobs(id),
+    FOREIGN KEY(scene_id) REFERENCES scenes(scene_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_downloads_job ON downloads(job_id);
+CREATE INDEX IF NOT EXISTS idx_downloads_scene ON downloads(scene_id);
+
+CREATE TABLE IF NOT EXISTS job_events (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    job_id INTEGER NOT NULL,
+    level TEXT NOT NULL,
+    message TEXT NOT NULL,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY(job_id) REFERENCES search_jobs(id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_job_events_job ON job_events(job_id);
+"""
+
+
+def connect(db_path: Path) -> sqlite3.Connection:
+    db_path.parent.mkdir(parents=True, exist_ok=True)
+    connection = sqlite3.connect(str(db_path))
+    connection.row_factory = sqlite3.Row
+    connection.executescript(SCHEMA)
+    return connection
+
+
+def set_setting(connection: sqlite3.Connection, key: str, value: str) -> None:
+    connection.execute(
+        """
+        INSERT INTO settings(key, value, updated_at)
+        VALUES (?, ?, CURRENT_TIMESTAMP)
+        ON CONFLICT(key) DO UPDATE SET
+            value = excluded.value,
+            updated_at = CURRENT_TIMESTAMP
+        """,
+        (key, value),
+    )
+
+
+def get_setting(connection: sqlite3.Connection, key: str) -> str | None:
+    row = connection.execute("SELECT value FROM settings WHERE key = ?", (key,)).fetchone()
+    if row is None:
+        return None
+    return str(row["value"])
diff --git a/src/sentinel_orbit_downloader/web/app.css b/src/sentinel_orbit_downloader/web/app.css
new file mode 100644
index 0000000..cb2d2aa
--- /dev/null
+++ b/src/sentinel_orbit_downloader/web/app.css
@@ -0,0 +1,573 @@
+:root {
+  color-scheme: light;
+  --bg: #f3f5f9;
+  --panel: #ffffff;
+  --panel-soft: #f8fafc;
+  --line: #d8dee8;
+  --text: #15253b;
+  --muted: #5e6c80;
+  --accent: #2563eb;
+  --accent-soft: #e7efff;
+  --success: #157347;
+  --success-soft: #dbf5e7;
+  --warning: #9a6700;
+  --warning-soft: #fff0cf;
+  --danger: #b42318;
+  --danger-soft: #ffe3df;
+  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05);
+}
+
+* {
+  box-sizing: border-box;
+}
+
+html,
+body {
+  margin: 0;
+  min-height: 100%;
+  font-family: "Segoe UI", system-ui, sans-serif;
+  background: var(--bg);
+  color: var(--text);
+}
+
+button,
+input,
+select,
+textarea {
+  font: inherit;
+}
+
+button,
+input,
+select,
+textarea,
+.item,
+.chip,
+.status-pill {
+  transition: border-color 120ms ease, background 120ms ease, color 120ms ease;
+}
+
+.shell {
+  min-height: 100vh;
+  display: grid;
+  grid-template-columns: 320px minmax(0, 1fr);
+}
+
+.sidebar {
+  padding: 20px;
+  border-right: 1px solid var(--line);
+  background: var(--panel);
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.brand h1,
+.topbar h2,
+.panel h2 {
+  margin: 0;
+}
+
+.brand p,
+.topbar p {
+  margin: 4px 0 0;
+  color: var(--muted);
+  font-size: 13px;
+}
+
+.content {
+  padding: 20px;
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  min-width: 0;
+}
+
+.topbar {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  gap: 16px;
+}
+
+.message {
+  min-height: 38px;
+  display: inline-flex;
+  align-items: center;
+  padding: 8px 12px;
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  background: var(--panel);
+  box-shadow: var(--shadow);
+  font-size: 13px;
+  line-height: 1.4;
+}
+
+.message.info {
+  color: var(--text);
+}
+
+.message.success {
+  border-color: #b8e3c9;
+  background: var(--success-soft);
+  color: var(--success);
+}
+
+.message.warning {
+  border-color: #f0d48a;
+  background: var(--warning-soft);
+  color: var(--warning);
+}
+
+.message.error {
+  border-color: #f3b8b1;
+  background: var(--danger-soft);
+  color: var(--danger);
+}
+
+.panel {
+  background: var(--panel);
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  box-shadow: var(--shadow);
+  padding: 16px;
+  min-width: 0;
+}
+
+.section-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.section-head h2 {
+  font-size: 15px;
+}
+
+.stack {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.layout.two-col {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 16px;
+}
+
+.grid {
+  display: grid;
+  gap: 12px;
+}
+
+.grid.two {
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+}
+
+.grid.three {
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+}
+
+.field {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  min-width: 0;
+}
+
+.field label,
+.field span {
+  font-size: 12px;
+  color: var(--muted);
+}
+
+.field input,
+.field select,
+.field textarea {
+  width: 100%;
+  min-height: 38px;
+  padding: 8px 10px;
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  background: #fff;
+  color: var(--text);
+}
+
+.field textarea {
+  min-height: 84px;
+  resize: vertical;
+}
+
+.field input:focus,
+.field select:focus,
+.field textarea:focus {
+  outline: none;
+  border-color: #94b5ff;
+  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
+}
+
+.inline-field input {
+  max-width: 160px;
+}
+
+.toolbar {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  align-items: center;
+}
+
+button {
+  min-height: 38px;
+  padding: 8px 12px;
+  border-radius: 6px;
+  border: 1px solid var(--line);
+  background: #fff;
+  color: var(--text);
+  cursor: pointer;
+}
+
+button:hover {
+  border-color: #bcc8d9;
+}
+
+button.primary {
+  background: var(--accent);
+  color: #fff;
+  border-color: var(--accent);
+}
+
+button.primary:hover {
+  background: #1d4ed8;
+  border-color: #1d4ed8;
+}
+
+button.ghost {
+  background: var(--panel-soft);
+}
+
+button.danger {
+  border-color: #f0c3bc;
+  background: #fff6f4;
+  color: var(--danger);
+}
+
+button.danger:hover {
+  border-color: #e5a59c;
+  background: #ffeceb;
+}
+
+button:disabled {
+  opacity: 0.55;
+  cursor: not-allowed;
+}
+
+.status-block {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.status-dot {
+  width: 10px;
+  height: 10px;
+  border-radius: 999px;
+  background: #98a2b3;
+  flex: none;
+}
+
+.status-dot.ok {
+  background: var(--success);
+}
+
+.status-dot.error {
+  background: var(--danger);
+}
+
+.status-title {
+  font-size: 13px;
+  font-weight: 600;
+}
+
+.status-subtle {
+  margin-top: 2px;
+  color: var(--muted);
+  font-size: 12px;
+}
+
+.mono {
+  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
+}
+
+.list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  min-height: 0;
+}
+
+.list.tall {
+  max-height: 320px;
+  overflow: auto;
+}
+
+.item {
+  width: 100%;
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  background: #fff;
+  text-align: left;
+  padding: 10px 12px;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.item:hover {
+  border-color: #c1d2fa;
+}
+
+.item.active {
+  border-color: var(--accent);
+  background: #f5f8ff;
+}
+
+.item-title {
+  font-size: 13px;
+  font-weight: 600;
+  line-height: 1.45;
+}
+
+.item-subtle {
+  font-size: 12px;
+  color: var(--muted);
+  line-height: 1.45;
+}
+
+.detail-card,
+.events {
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  background: var(--panel-soft);
+  padding: 12px;
+}
+
+.detail-card {
+  min-height: 150px;
+}
+
+.detail-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 10px;
+}
+
+.detail-row {
+  display: flex;
+  flex-direction: column;
+  gap: 3px;
+}
+
+.detail-label {
+  font-size: 12px;
+  color: var(--muted);
+}
+
+.detail-value {
+  font-size: 13px;
+  line-height: 1.4;
+}
+
+.chip-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.chip {
+  display: inline-flex;
+  align-items: center;
+  min-height: 32px;
+  padding: 6px 10px;
+  border-radius: 999px;
+  background: var(--panel-soft);
+  border: 1px solid var(--line);
+  font-size: 12px;
+  line-height: 1.4;
+}
+
+.status-pill {
+  display: inline-flex;
+  align-items: center;
+  min-height: 24px;
+  padding: 2px 8px;
+  border-radius: 999px;
+  font-size: 12px;
+  line-height: 1.4;
+  background: var(--panel-soft);
+  color: var(--muted);
+}
+
+.status-pill.pending,
+.status-pill.queued,
+.status-pill.skipped {
+  background: #edf1f6;
+  color: var(--muted);
+}
+
+.status-pill.running {
+  background: var(--accent-soft);
+  color: var(--accent);
+}
+
+.status-pill.succeeded {
+  background: var(--success-soft);
+  color: var(--success);
+}
+
+.status-pill.partial_failed {
+  background: var(--warning-soft);
+  color: var(--warning);
+}
+
+.status-pill.failed,
+.status-pill.error {
+  background: var(--danger-soft);
+  color: var(--danger);
+}
+
+.toggle-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 12px;
+}
+
+.toggle {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+  min-height: 38px;
+  padding: 0;
+  color: var(--text);
+}
+
+.toggle input {
+  width: 16px;
+  height: 16px;
+}
+
+.note {
+  font-size: 12px;
+  line-height: 1.5;
+  color: var(--muted);
+  background: var(--panel-soft);
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  padding: 10px 12px;
+}
+
+.detail-layout {
+  display: grid;
+  grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
+  gap: 16px;
+}
+
+.table-wrap {
+  overflow: auto;
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  background: #fff;
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+  table-layout: fixed;
+  font-size: 12px;
+}
+
+thead {
+  background: #fafbfd;
+}
+
+th,
+td {
+  border-top: 1px solid var(--line);
+  text-align: left;
+  vertical-align: top;
+  padding: 9px 8px;
+  word-break: break-word;
+}
+
+thead th {
+  border-top: 0;
+  color: var(--muted);
+  font-weight: 600;
+}
+
+.events {
+  min-height: 280px;
+  max-height: 420px;
+  overflow: auto;
+}
+
+.event {
+  padding: 8px 0;
+  border-top: 1px solid #e8edf4;
+}
+
+.event:first-child {
+  border-top: 0;
+  padding-top: 0;
+}
+
+.event-title {
+  font-size: 12px;
+  font-weight: 600;
+}
+
+.event-meta {
+  margin-top: 2px;
+  font-size: 12px;
+  color: var(--muted);
+}
+
+.event-message {
+  margin-top: 4px;
+  font-size: 12px;
+  line-height: 1.5;
+}
+
+.empty {
+  color: var(--muted);
+  font-size: 12px;
+  padding: 8px 0;
+}
+
+@media (max-width: 1200px) {
+  .shell {
+    grid-template-columns: 1fr;
+  }
+
+  .sidebar {
+    border-right: 0;
+    border-bottom: 1px solid var(--line);
+  }
+}
+
+@media (max-width: 900px) {
+  .layout.two-col,
+  .grid.two,
+  .grid.three,
+  .detail-layout,
+  .detail-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .topbar {
+    flex-direction: column;
+    align-items: stretch;
+  }
+}
diff --git a/src/sentinel_orbit_downloader/web/app.js b/src/sentinel_orbit_downloader/web/app.js
new file mode 100644
index 0000000..354c28c
--- /dev/null
+++ b/src/sentinel_orbit_downloader/web/app.js
@@ -0,0 +1,864 @@
+const DEFAULT_CATALOG_PATH = "\u5168\u56fd\u884c\u653f\u533a.geojson";
+const FINAL_STATUSES = new Set(["succeeded", "failed", "partial_failed", "canceled"]);
+
+const api = {
+  async request(path, options = {}) {
+    const init = { ...options };
+    init.headers = {
+      ...(options.body ? { "Content-Type": "application/json" } : {}),
+      ...(options.headers || {}),
+    };
+    const response = await fetch(path, init);
+    if (!response.ok) {
+      let detail = response.statusText;
+      try {
+        const payload = await response.json();
+        detail = payload.detail || JSON.stringify(payload);
+      } catch (_) {}
+      throw new Error(detail);
+    }
+    if (response.status === 204) {
+      return null;
+    }
+    return response.json();
+  },
+  health() {
+    return this.request("/api/health");
+  },
+  earthdataSettings() {
+    return this.request("/api/settings/earthdata");
+  },
+  saveEarthdataSettings(payload) {
+    return this.request("/api/settings/earthdata", {
+      method: "PUT",
+      body: JSON.stringify(payload),
+    });
+  },
+  clearEarthdataSettings() {
+    return this.request("/api/settings/earthdata", {
+      method: "DELETE",
+    });
+  },
+  importRegions(payload) {
+    return this.request("/api/regions/import", {
+      method: "POST",
+      body: JSON.stringify(payload),
+    });
+  },
+  searchRegions(query) {
+    return this.request(`/api/regions/search?q=${encodeURIComponent(query)}`);
+  },
+  regionDetail(adcode) {
+    return this.request(`/api/regions/${encodeURIComponent(adcode)}`);
+  },
+  projects() {
+    return this.request("/api/projects");
+  },
+  createProject(payload) {
+    return this.request("/api/projects", {
+      method: "POST",
+      body: JSON.stringify(payload),
+    });
+  },
+  jobs(projectId) {
+    const suffix = projectId ? `?project_id=${projectId}&limit=50` : "?limit=50";
+    return this.request(`/api/jobs${suffix}`);
+  },
+  job(jobId) {
+    return this.request(`/api/jobs/${jobId}?include_events=true`);
+  },
+  createSearchJob(payload) {
+    return this.request("/api/search-jobs", {
+      method: "POST",
+      body: JSON.stringify(payload),
+    });
+  },
+  createDownloadJob(payload) {
+    return this.request("/api/download-jobs", {
+      method: "POST",
+      body: JSON.stringify(payload),
+    });
+  },
+  deleteJob(jobId, force = false) {
+    return this.request(`/api/jobs/${jobId}?force=${force ? "true" : "false"}`, {
+      method: "DELETE",
+    });
+  },
+  clearJobs(projectId, force = false) {
+    const projectPart = projectId ? `project_id=${projectId}&` : "";
+    return this.request(`/api/jobs?${projectPart}force=${force ? "true" : "false"}`, {
+      method: "DELETE",
+    });
+  },
+};
+
+const state = {
+  projects: [],
+  selectedProjectId: null,
+  regions: [],
+  selectedRegion: null,
+  selectedRegionDetail: null,
+  earthdataSettings: null,
+  jobs: [],
+  selectedJobId: null,
+  selectedJobDetail: null,
+  pollTimer: null,
+};
+
+const el = {
+  healthDot: document.getElementById("healthDot"),
+  healthLabel: document.getElementById("healthLabel"),
+  healthDetail: document.getElementById("healthDetail"),
+  catalogPath: document.getElementById("catalogPath"),
+  simplifyTolerance: document.getElementById("simplifyTolerance"),
+  projectName: document.getElementById("projectName"),
+  projectPath: document.getElementById("projectPath"),
+  projectDesc: document.getElementById("projectDesc"),
+  projectList: document.getElementById("projectList"),
+  messageBar: document.getElementById("messageBar"),
+  regionKeyword: document.getElementById("regionKeyword"),
+  regionList: document.getElementById("regionList"),
+  regionDetailCard: document.getElementById("regionDetailCard"),
+  startDate: document.getElementById("startDate"),
+  endDate: document.getElementById("endDate"),
+  maxResults: document.getElementById("maxResults"),
+  processingLevel: document.getElementById("processingLevel"),
+  beamMode: document.getElementById("beamMode"),
+  flightDirection: document.getElementById("flightDirection"),
+  polarization: document.getElementById("polarization"),
+  relativeOrbit: document.getElementById("relativeOrbit"),
+  manifestPath: document.getElementById("manifestPath"),
+  rawRegion: document.getElementById("rawRegion"),
+  selectionSummary: document.getElementById("selectionSummary"),
+  dataDir: document.getElementById("dataDir"),
+  orbitDir: document.getElementById("orbitDir"),
+  skipData: document.getElementById("skipData"),
+  skipOrbits: document.getElementById("skipOrbits"),
+  downloadProcesses: document.getElementById("downloadProcesses"),
+  ignoreOrbitErrors: document.getElementById("ignoreOrbitErrors"),
+  earthdataUser: document.getElementById("earthdataUser"),
+  earthdataPass: document.getElementById("earthdataPass"),
+  earthdataSummary: document.getElementById("earthdataSummary"),
+  jobFilterSummary: document.getElementById("jobFilterSummary"),
+  jobList: document.getElementById("jobList"),
+  deleteJobBtn: document.getElementById("deleteJobBtn"),
+  clearJobsBtn: document.getElementById("clearJobsBtn"),
+  jobMeta: document.getElementById("jobMeta"),
+  sceneTableBody: document.getElementById("sceneTableBody"),
+  eventList: document.getElementById("eventList"),
+};
+
+function setMessage(text, tone = "info") {
+  el.messageBar.textContent = text;
+  el.messageBar.className = `message ${tone}`;
+}
+
+function setHealth(ok, label, detail) {
+  el.healthDot.className = `status-dot ${ok ? "ok" : "error"}`;
+  el.healthLabel.textContent = label;
+  el.healthDetail.textContent = detail;
+}
+
+function makeChip(text) {
+  const span = document.createElement("span");
+  span.className = "chip";
+  span.textContent = text;
+  return span;
+}
+
+function makeStatusPill(value) {
+  const span = document.createElement("span");
+  span.className = `status-pill ${value || ""}`.trim();
+  span.textContent = value || "-";
+  return span;
+}
+
+function renderEmpty(container, text) {
+  container.innerHTML = `<div class="empty">${escapeHtml(text)}</div>`;
+}
+
+function formatMb(value) {
+  if (value == null || Number.isNaN(Number(value))) {
+    return "";
+  }
+  return `${Number(value).toFixed(1)} MB`;
+}
+
+function formatRelativeOrbit(value) {
+  return value == null ? "" : String(value);
+}
+
+function formatBBox(bbox) {
+  if (!Array.isArray(bbox) || bbox.length !== 4) {
+    return "-";
+  }
+  return bbox.map((value) => Number(value).toFixed(4)).join(", ");
+}
+
+function formatPoint(point) {
+  if (!Array.isArray(point) || point.length < 2) {
+    return "-";
+  }
+  return point.slice(0, 2).map((value) => Number(value).toFixed(4)).join(", ");
+}
+
+function emptyToNull(value) {
+  const text = (value || "").trim();
+  return text ? text : null;
+}
+
+function numberOrNull(value) {
+  const text = (value || "").trim();
+  if (!text) {
+    return null;
+  }
+  const number = Number(text);
+  return Number.isFinite(number) ? number : null;
+}
+
+function escapeHtml(text) {
+  const div = document.createElement("div");
+  div.textContent = text || "";
+  return div.innerHTML;
+}
+
+function statusCounts(scenes) {
+  const product = {};
+  const orbit = {};
+  for (const scene of scenes) {
+    product[scene.product_status] = (product[scene.product_status] || 0) + 1;
+    orbit[scene.orbit_status] = (orbit[scene.orbit_status] || 0) + 1;
+  }
+  return { product, orbit };
+}
+
+function currentProject() {
+  return state.projects.find((project) => project.id === state.selectedProjectId) || null;
+}
+
+function autoFillProjectPaths(project) {
+  if (!project || !project.data_root) {
+    return;
+  }
+  el.projectPath.value = project.data_root;
+  el.dataDir.value = `${project.data_root}\\data`;
+  el.orbitDir.value = `${project.data_root}\\orbits`;
+  if (!el.manifestPath.value) {
+    el.manifestPath.value = `${project.data_root}\\manifest.csv`;
+  }
+}
+
+function renderProjects() {
+  el.projectList.innerHTML = "";
+  if (!state.projects.length) {
+    renderEmpty(el.projectList, "暂无项目");
+    return;
+  }
+
+  for (const project of state.projects) {
+    const button = document.createElement("button");
+    button.type = "button";
+    button.className = `item ${state.selectedProjectId === project.id ? "active" : ""}`;
+    button.innerHTML = `
+      <div class="item-title">${escapeHtml(project.name)}</div>
+      <div class="item-subtle mono">${escapeHtml(project.data_root)}</div>
+      <div class="item-subtle">${escapeHtml(project.slug)}</div>
+    `;
+    button.addEventListener("click", async () => {
+      state.selectedProjectId = project.id;
+      autoFillProjectPaths(project);
+      renderProjects();
+      updateSelectionSummary();
+      await loadJobs();
+      await loadSelectedJobDetail();
+    });
+    el.projectList.appendChild(button);
+  }
+}
+
+function renderRegions() {
+  el.regionList.innerHTML = "";
+  if (!state.regions.length) {
+    renderEmpty(el.regionList, "暂无行政区结果");
+    return;
+  }
+
+  for (const region of state.regions) {
+    const button = document.createElement("button");
+    button.type = "button";
+    button.className = `item ${state.selectedRegion && state.selectedRegion.adcode === region.adcode ? "active" : ""}`;
+    button.innerHTML = `
+      <div class="item-title">${escapeHtml(region.label)}</div>
+      <div class="item-subtle mono">${escapeHtml(region.adcode)}</div>
+      <div class="item-subtle">${escapeHtml(region.level)} | ${escapeHtml(formatBBox(region.bbox))}</div>
+    `;
+    button.addEventListener("click", async () => {
+      state.selectedRegion = region;
+      renderRegions();
+      updateSelectionSummary();
+      await loadRegionDetail(region.adcode);
+    });
+    el.regionList.appendChild(button);
+  }
+}
+
+function renderRegionDetail() {
+  const region = state.selectedRegionDetail;
+  if (!region) {
+    el.regionDetailCard.innerHTML = '<div class="empty">未选择行政区</div>';
+    return;
+  }
+
+  el.regionDetailCard.innerHTML = `
+    <div class="stack">
+      <div class="chip-row">
+        <span class="status-pill succeeded">${escapeHtml(region.level)}</span>
+        <span class="chip mono">${escapeHtml(region.adcode)}</span>
+      </div>
+      <div class="detail-grid">
+        <div class="detail-row">
+          <div class="detail-label">行政区</div>
+          <div class="detail-value">${escapeHtml(region.label)}</div>
+        </div>
+        <div class="detail-row">
+          <div class="detail-label">简化容差</div>
+          <div class="detail-value">${escapeHtml(String(region.simplify_tolerance))}</div>
+        </div>
+        <div class="detail-row">
+          <div class="detail-label">范围框</div>
+          <div class="detail-value mono">${escapeHtml(formatBBox(region.bbox))}</div>
+        </div>
+        <div class="detail-row">
+          <div class="detail-label">中心点</div>
+          <div class="detail-value mono">${escapeHtml(formatPoint(region.center))}</div>
+        </div>
+      </div>
+    </div>
+  `;
+}
+
+function renderEarthdataSummary() {
+  el.earthdataSummary.innerHTML = "";
+  const settings = state.earthdataSettings;
+  if (!settings || (!settings.username && !settings.has_password)) {
+    el.earthdataSummary.appendChild(makeChip("Earthdata 本地凭据：未保存"));
+    return;
+  }
+  if (settings.username) {
+    el.earthdataSummary.appendChild(makeChip(`Earthdata 用户：${settings.username}`));
+  }
+  el.earthdataSummary.appendChild(
+    makeChip(settings.has_password ? "Earthdata 密码：已保存" : "Earthdata 密码：未保存"),
+  );
+}
+
+function renderJobFilterSummary() {
+  el.jobFilterSummary.innerHTML = "";
+  const project = currentProject();
+  if (project) {
+    el.jobFilterSummary.appendChild(makeChip(`项目 ${project.name}`));
+  } else {
+    el.jobFilterSummary.appendChild(makeChip("全部项目"));
+  }
+  el.jobFilterSummary.appendChild(makeChip(`任务数 ${state.jobs.length}`));
+}
+
+function renderJobs() {
+  el.jobList.innerHTML = "";
+  if (!state.jobs.length) {
+    renderEmpty(el.jobList, "暂无任务");
+    renderJobFilterSummary();
+    return;
+  }
+
+  for (const job of state.jobs) {
+    const button = document.createElement("button");
+    button.type = "button";
+    button.className = `item ${state.selectedJobId === job.id ? "active" : ""}`;
+    button.appendChild(makeStatusPill(job.status));
+
+    const title = document.createElement("div");
+    title.className = "item-title";
+    title.textContent = `#${job.id} ${job.region_name || job.source_value || job.source_type}`;
+    button.appendChild(title);
+
+    const subtles = [
+      `${job.start_time} - ${job.end_time}`,
+      `${job.processing_level}${job.beam_mode ? ` | ${job.beam_mode}` : ""}`,
+      `结果 ${job.result_count ?? "-"}`,
+    ];
+    for (const text of subtles) {
+      const div = document.createElement("div");
+      div.className = "item-subtle";
+      div.textContent = text;
+      button.appendChild(div);
+    }
+
+    button.addEventListener("click", async () => {
+      state.selectedJobId = job.id;
+      renderJobs();
+      updateSelectionSummary();
+      await loadSelectedJobDetail();
+    });
+    el.jobList.appendChild(button);
+  }
+
+  renderJobFilterSummary();
+}
+
+function renderJobDetail() {
+  const payload = state.selectedJobDetail;
+  el.jobMeta.innerHTML = "";
+  el.sceneTableBody.innerHTML = "";
+  el.eventList.innerHTML = "";
+
+  if (!payload) {
+    renderEmpty(el.jobMeta, "未选择任务");
+    el.sceneTableBody.innerHTML = '<tr><td colspan="7" class="empty">暂无场景</td></tr>';
+    renderEmpty(el.eventList, "暂无事件");
+    return;
+  }
+
+  const { job, scenes, events } = payload;
+  const counts = statusCounts(scenes);
+  const chips = [
+    `Job #${job.id}`,
+    `状态 ${job.status}`,
+    `时间 ${job.start_time} - ${job.end_time}`,
+    `产品 ${job.processing_level}`,
+    `结果 ${job.result_count ?? scenes.length}`,
+  ];
+
+  if (job.region_name) {
+    chips.push(`区域 ${job.region_name}`);
+  }
+  if (job.data_dir) {
+    chips.push(`数据目录 ${job.data_dir}`);
+  }
+  if (job.orbit_dir) {
+    chips.push(`轨道目录 ${job.orbit_dir}`);
+  }
+  if (job.error_message) {
+    chips.push(`错误 ${job.error_message}`);
+  }
+
+  for (const text of chips) {
+    el.jobMeta.appendChild(makeChip(text));
+  }
+  for (const [status, count] of Object.entries(counts.product)) {
+    el.jobMeta.appendChild(makeChip(`产品 ${status} ${count}`));
+  }
+  for (const [status, count] of Object.entries(counts.orbit)) {
+    el.jobMeta.appendChild(makeChip(`轨道 ${status} ${count}`));
+  }
+
+  if (!scenes.length) {
+    el.sceneTableBody.innerHTML = '<tr><td colspan="7" class="empty">暂无场景</td></tr>';
+  } else {
+    for (const scene of scenes) {
+      const row = document.createElement("tr");
+
+      const sceneCell = document.createElement("td");
+      sceneCell.className = "mono";
+      sceneCell.textContent = scene.scene_id;
+      row.appendChild(sceneCell);
+
+      const startCell = document.createElement("td");
+      startCell.textContent = scene.start_time || "";
+      row.appendChild(startCell);
+
+      const levelCell = document.createElement("td");
+      levelCell.textContent = scene.processing_level || "";
+      row.appendChild(levelCell);
+
+      const orbitCell = document.createElement("td");
+      orbitCell.textContent = formatRelativeOrbit(scene.relative_orbit);
+      row.appendChild(orbitCell);
+
+      const productCell = document.createElement("td");
+      productCell.appendChild(makeStatusPill(scene.product_status));
+      row.appendChild(productCell);
+
+      const eofCell = document.createElement("td");
+      eofCell.appendChild(makeStatusPill(scene.orbit_status));
+      row.appendChild(eofCell);
+
+      const sizeCell = document.createElement("td");
+      sizeCell.textContent = formatMb(scene.size_mb);
+      row.appendChild(sizeCell);
+
+      el.sceneTableBody.appendChild(row);
+    }
+  }
+
+  if (!events.length) {
+    renderEmpty(el.eventList, "暂无事件");
+  } else {
+    for (const event of events) {
+      const div = document.createElement("div");
+      div.className = "event";
+      div.innerHTML = `
+        <div class="event-title">${escapeHtml(event.level)}</div>
+        <div class="event-meta">${escapeHtml(event.created_at)}</div>
+        <div class="event-message">${escapeHtml(event.message)}</div>
+      `;
+      el.eventList.appendChild(div);
+    }
+  }
+
+  syncPolling();
+}
+
+function updateSelectionSummary() {
+  el.selectionSummary.innerHTML = "";
+  const project = currentProject();
+  if (project) {
+    el.selectionSummary.appendChild(makeChip(`项目 ${project.name}`));
+  }
+  if (state.selectedRegion) {
+    el.selectionSummary.appendChild(makeChip(`行政区 ${state.selectedRegion.label}`));
+  }
+  el.selectionSummary.appendChild(makeChip(`时间 ${el.startDate.value} - ${el.endDate.value}`));
+  el.selectionSummary.appendChild(makeChip(`产品 ${el.processingLevel.value}`));
+  if (el.beamMode.value) {
+    el.selectionSummary.appendChild(makeChip(`波束 ${el.beamMode.value}`));
+  }
+  if (state.selectedJobId) {
+    el.selectionSummary.appendChild(makeChip(`当前任务 #${state.selectedJobId}`));
+  }
+}
+
+async function loadHealth() {
+  try {
+    const health = await api.health();
+    setHealth(true, "服务已连接", health.db_path);
+  } catch (error) {
+    setHealth(false, "服务不可用", error.message || String(error));
+    throw error;
+  }
+}
+
+async function loadEarthdataSettings() {
+  state.earthdataSettings = await api.earthdataSettings();
+  if (state.earthdataSettings && state.earthdataSettings.username && !el.earthdataUser.value) {
+    el.earthdataUser.value = state.earthdataSettings.username;
+  }
+  renderEarthdataSummary();
+}
+
+async function loadProjects() {
+  state.projects = await api.projects();
+  if (!state.selectedProjectId && state.projects.length) {
+    state.selectedProjectId = state.projects[0].id;
+    autoFillProjectPaths(state.projects[0]);
+  } else {
+    const project = currentProject();
+    if (project) {
+      autoFillProjectPaths(project);
+    }
+  }
+  renderProjects();
+  updateSelectionSummary();
+}
+
+async function loadRegions() {
+  const keyword = el.regionKeyword.value.trim();
+  if (!keyword) {
+    state.regions = [];
+    state.selectedRegion = null;
+    state.selectedRegionDetail = null;
+    renderRegions();
+    renderRegionDetail();
+    updateSelectionSummary();
+    return;
+  }
+
+  state.regions = await api.searchRegions(keyword);
+  state.selectedRegion = state.regions[0] || null;
+  renderRegions();
+  if (state.selectedRegion) {
+    await loadRegionDetail(state.selectedRegion.adcode);
+  } else {
+    state.selectedRegionDetail = null;
+    renderRegionDetail();
+  }
+  updateSelectionSummary();
+}
+
+async function loadRegionDetail(adcode) {
+  state.selectedRegionDetail = await api.regionDetail(adcode);
+  renderRegionDetail();
+}
+
+async function loadJobs() {
+  state.jobs = await api.jobs(state.selectedProjectId);
+  if (state.selectedJobId && !state.jobs.some((job) => job.id === state.selectedJobId)) {
+    state.selectedJobId = null;
+    state.selectedJobDetail = null;
+  }
+  renderJobs();
+  updateSelectionSummary();
+}
+
+async function loadSelectedJobDetail() {
+  if (!state.selectedJobId) {
+    state.selectedJobDetail = null;
+    renderJobDetail();
+    return;
+  }
+  state.selectedJobDetail = await api.job(state.selectedJobId);
+  const updatedJob = state.selectedJobDetail.job;
+  state.jobs = state.jobs.map((job) => (job.id === updatedJob.id ? updatedJob : job));
+  renderJobs();
+  renderJobDetail();
+  updateSelectionSummary();
+}
+
+async function importCatalog() {
+  const payload = {
+    source_path: el.catalogPath.value.trim() || DEFAULT_CATALOG_PATH,
+    simplify_tolerance: Number(el.simplifyTolerance.value || 0.01),
+  };
+  const result = await api.importRegions(payload);
+  setMessage(`行政区已导入：${result.imported}/${result.total_features}`, "success");
+  await loadRegions();
+}
+
+async function saveEarthdataSettings() {
+  const username = el.earthdataUser.value.trim();
+  const password = el.earthdataPass.value;
+  if (!username || !password) {
+    throw new Error("保存 Earthdata 凭据时必须填写用户名和密码");
+  }
+  const response = await api.saveEarthdataSettings({ username, password });
+  state.earthdataSettings = response;
+  el.earthdataPass.value = "";
+  renderEarthdataSummary();
+  setMessage("Earthdata 凭据已保存到本地配置", "success");
+}
+
+async function clearEarthdataSettings() {
+  if (!window.confirm("确定清除本地保存的 Earthdata 用户名和密码吗？")) {
+    return;
+  }
+  await api.clearEarthdataSettings();
+  state.earthdataSettings = { username: null, has_password: false };
+  el.earthdataUser.value = "";
+  el.earthdataPass.value = "";
+  renderEarthdataSummary();
+  setMessage("Earthdata 本地凭据已清除", "success");
+}
+
+async function createProject() {
+  const payload = {
+    name: el.projectName.value.trim(),
+    data_root: el.projectPath.value.trim(),
+    description: emptyToNull(el.projectDesc.value),
+  };
+  if (!payload.name || !payload.data_root) {
+    throw new Error("项目名称和数据根目录不能为空");
+  }
+  const project = await api.createProject(payload);
+  state.selectedProjectId = project.id;
+  setMessage(`项目已创建：${project.name}`, "success");
+  await loadProjects();
+  await loadJobs();
+}
+
+async function createSearchJob() {
+  if (!state.selectedProjectId) {
+    throw new Error("请先选择项目");
+  }
+  if (!state.selectedRegion) {
+    throw new Error("请先选择行政区");
+  }
+
+  const payload = {
+    project_id: state.selectedProjectId,
+    region_adcode: state.selectedRegion.adcode,
+    start: el.startDate.value,
+    end: el.endDate.value,
+    processing_level: el.processingLevel.value,
+    beam_mode: emptyToNull(el.beamMode.value),
+    flight_direction: emptyToNull(el.flightDirection.value),
+    polarization: emptyToNull(el.polarization.value),
+    relative_orbit: numberOrNull(el.relativeOrbit.value),
+    max_results: Number(el.maxResults.value || 20),
+    manifest_path: emptyToNull(el.manifestPath.value),
+    raw_region: el.rawRegion.checked,
+  };
+
+  const response = await api.createSearchJob(payload);
+  state.selectedJobId = response.job.id;
+  state.selectedJobDetail = {
+    job: response.job,
+    scenes: response.scenes,
+    events: [],
+  };
+  setMessage(`检索完成：job #${response.job.id}，场景 ${response.scenes.length}`, "success");
+  await loadJobs();
+  await loadSelectedJobDetail();
+}
+
+async function queueDownloadJob() {
+  if (!state.selectedJobId) {
+    throw new Error("请先选择任务");
+  }
+
+  const payload = {
+    job_id: state.selectedJobId,
+    data_dir: emptyToNull(el.dataDir.value),
+    orbit_dir: emptyToNull(el.orbitDir.value),
+    skip_data: el.skipData.value === "true",
+    skip_orbits: el.skipOrbits.value === "true",
+    processes: Number(el.downloadProcesses.value || 2),
+    ignore_orbit_errors: el.ignoreOrbitErrors.checked,
+    username: emptyToNull(el.earthdataUser.value),
+    password: emptyToNull(el.earthdataPass.value),
+  };
+
+  const response = await api.createDownloadJob(payload);
+  setMessage(`下载任务已排队：job #${response.job.id}`, "success");
+  await loadSelectedJobDetail();
+}
+
+async function deleteSelectedJob() {
+  if (!state.selectedJobId) {
+    throw new Error("请先选择任务");
+  }
+
+  const selectedJob =
+    (state.selectedJobDetail && state.selectedJobDetail.job) ||
+    state.jobs.find((job) => job.id === state.selectedJobId) ||
+    null;
+  const isRunning = Boolean(selectedJob && selectedJob.status === "running");
+  const message = isRunning
+    ? "当前任务仍显示为运行中。强制删除只会清理记录，不能保证后台下载立刻停止。确定继续删除吗？"
+    : `确定删除任务 #${state.selectedJobId} 吗？`;
+
+  if (!window.confirm(message)) {
+    return;
+  }
+
+  const deletedJobId = state.selectedJobId;
+  const response = await api.deleteJob(deletedJobId, isRunning);
+  state.selectedJobId = null;
+  state.selectedJobDetail = null;
+  state.jobs = state.jobs.filter((job) => job.id !== deletedJobId);
+  renderJobs();
+  renderJobDetail();
+  updateSelectionSummary();
+  setMessage(`已删除 ${response.deleted_count} 个任务`, "success");
+}
+
+async function clearCurrentJobs() {
+  if (!state.selectedProjectId) {
+    throw new Error("请先选择项目");
+  }
+
+  const project = currentProject();
+  const projectName = project ? project.name : `#${state.selectedProjectId}`;
+  if (!window.confirm(`确定清空项目“${projectName}”下的非运行任务吗？`)) {
+    return;
+  }
+
+  const response = await api.clearJobs(state.selectedProjectId, false);
+  const deletedIds = new Set(response.deleted_job_ids || []);
+  if (state.selectedJobId && deletedIds.has(state.selectedJobId)) {
+    state.selectedJobId = null;
+    state.selectedJobDetail = null;
+  }
+  state.jobs = state.jobs.filter((job) => !deletedIds.has(job.id));
+  renderJobs();
+  renderJobDetail();
+  updateSelectionSummary();
+  setMessage(`已清空 ${response.deleted_count} 个任务`, "success");
+}
+
+function stopPolling() {
+  if (state.pollTimer) {
+    window.clearInterval(state.pollTimer);
+    state.pollTimer = null;
+  }
+}
+
+function syncPolling() {
+  const activeJob = state.selectedJobDetail && state.selectedJobDetail.job;
+  if (!activeJob || FINAL_STATUSES.has(activeJob.status)) {
+    stopPolling();
+    return;
+  }
+  if (state.pollTimer) {
+    return;
+  }
+  state.pollTimer = window.setInterval(async () => {
+    if (!state.selectedJobId) {
+      stopPolling();
+      return;
+    }
+    try {
+      await loadSelectedJobDetail();
+    } catch (_) {}
+  }, 5000);
+}
+
+function runAction(fn, pendingText) {
+  return async () => {
+    try {
+      if (pendingText) {
+        setMessage(pendingText, "info");
+      }
+      await fn();
+    } catch (error) {
+      setMessage(error.message || String(error), "error");
+    }
+  };
+}
+
+function bindEvents() {
+  document.getElementById("saveEarthdataBtn").addEventListener("click", runAction(saveEarthdataSettings, "正在保存 Earthdata 凭据"));
+  document.getElementById("clearEarthdataBtn").addEventListener("click", runAction(clearEarthdataSettings, "正在清除 Earthdata 凭据"));
+  document.getElementById("importCatalogBtn").addEventListener("click", runAction(importCatalog, "正在导入行政区"));
+  document.getElementById("createProjectBtn").addEventListener("click", runAction(createProject, "正在创建项目"));
+  document.getElementById("refreshProjectsBtn").addEventListener("click", runAction(loadProjects, "正在刷新项目"));
+  document.getElementById("searchRegionsBtn").addEventListener("click", runAction(loadRegions, "正在查询行政区"));
+  document.getElementById("clearRegionsBtn").addEventListener("click", () => {
+    state.regions = [];
+    state.selectedRegion = null;
+    state.selectedRegionDetail = null;
+    el.regionKeyword.value = "";
+    renderRegions();
+    renderRegionDetail();
+    updateSelectionSummary();
+    setMessage("行政区查询已清空", "info");
+  });
+  document.getElementById("runSearchBtn").addEventListener("click", runAction(createSearchJob, "正在检索 Sentinel-1"));
+  document.getElementById("queueDownloadBtn").addEventListener("click", runAction(queueDownloadJob, "正在排队下载任务"));
+  document.getElementById("deleteJobBtn").addEventListener("click", runAction(deleteSelectedJob, "正在删除任务"));
+  document.getElementById("clearJobsBtn").addEventListener("click", runAction(clearCurrentJobs, "正在清空任务"));
+  document.getElementById("refreshJobsBtn").addEventListener("click", runAction(async () => {
+    await loadJobs();
+    await loadSelectedJobDetail();
+  }, "正在刷新任务"));
+  document.getElementById("refreshDetailBtn").addEventListener("click", runAction(loadSelectedJobDetail, "正在刷新任务详情"));
+}
+
+async function bootstrap() {
+  bindEvents();
+  if (!el.catalogPath.value) {
+    el.catalogPath.value = DEFAULT_CATALOG_PATH;
+  }
+  el.healthDetail.textContent = window.location.origin;
+  setMessage("正在初始化工作台", "info");
+  await loadHealth();
+  await loadEarthdataSettings();
+  await loadProjects();
+  await loadRegions();
+  await loadJobs();
+  await loadSelectedJobDetail();
+  setMessage("工作台已就绪", "success");
+}
+
+bootstrap().catch((error) => {
+  setMessage(error.message || String(error), "error");
+});
diff --git a/src/sentinel_orbit_downloader/web/index.html b/src/sentinel_orbit_downloader/web/index.html
new file mode 100644
index 0000000..4e17097
--- /dev/null
+++ b/src/sentinel_orbit_downloader/web/index.html
@@ -0,0 +1,271 @@
+<!doctype html>
+<html lang="zh-CN">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>Sentinel Orbit Downloader</title>
+  <link rel="stylesheet" href="/static/app.css">
+</head>
+<body>
+  <div class="shell">
+    <aside class="sidebar">
+      <div class="brand">
+        <h1>Sentinel Orbit Downloader</h1>
+        <p>本地查询、下载与精密轨道管理</p>
+      </div>
+
+      <section class="panel stack">
+        <div class="section-head">
+          <h2>环境配置</h2>
+        </div>
+        <div class="status-block">
+          <span class="status-dot" id="healthDot"></span>
+          <div>
+            <div class="status-title" id="healthLabel">正在连接服务</div>
+            <div class="status-subtle mono" id="healthDetail">http://127.0.0.1:8011</div>
+          </div>
+        </div>
+        <div class="field">
+          <label for="catalogPath">行政区 GeoJSON</label>
+          <input id="catalogPath" value="">
+        </div>
+        <div class="field inline-field">
+          <label for="simplifyTolerance">简化容差</label>
+          <input id="simplifyTolerance" type="number" min="0.0001" step="0.001" value="0.01">
+        </div>
+        <div class="toolbar">
+          <button class="primary" id="importCatalogBtn" type="button">导入行政区</button>
+        </div>
+      </section>
+
+      <section class="panel stack">
+        <div class="section-head">
+          <h2>项目</h2>
+          <button class="ghost" id="refreshProjectsBtn" type="button">刷新</button>
+        </div>
+        <div class="field">
+          <label for="projectName">项目名称</label>
+          <input id="projectName" value="牡丹江 Sentinel-1 数据">
+        </div>
+        <div class="field">
+          <label for="projectPath">数据根目录</label>
+          <input id="projectPath" value=".local-data\\mudanjiang">
+        </div>
+        <div class="field">
+          <label for="projectDesc">说明</label>
+          <textarea id="projectDesc">牡丹江 Sentinel-1 场景、精密轨道与任务记录。</textarea>
+        </div>
+        <div class="toolbar">
+          <button class="primary" id="createProjectBtn" type="button">新建项目</button>
+        </div>
+        <div id="projectList" class="list"></div>
+      </section>
+    </aside>
+
+    <main class="content">
+      <header class="topbar">
+        <div>
+          <h2>任务工作台</h2>
+          <p>按行政区和时间检索 Sentinel-1，并统一管理数据与精密轨道下载。</p>
+        </div>
+        <div class="message" id="messageBar">等待操作</div>
+      </header>
+
+      <section class="layout two-col">
+        <section class="panel stack">
+          <div class="section-head">
+            <h2>行政区选择</h2>
+            <div class="toolbar">
+              <button class="ghost" id="searchRegionsBtn" type="button">查询</button>
+              <button class="ghost" id="clearRegionsBtn" type="button">清空</button>
+            </div>
+          </div>
+          <div class="field">
+            <label for="regionKeyword">名称或 adcode</label>
+            <input id="regionKeyword" value="牡丹江">
+          </div>
+          <div id="regionList" class="list tall"></div>
+          <div class="detail-card" id="regionDetailCard">
+            <div class="empty">未选择行政区</div>
+          </div>
+        </section>
+
+        <section class="panel stack">
+          <div class="section-head">
+            <h2>检索参数</h2>
+            <button class="primary" id="runSearchBtn" type="button">发起检索</button>
+          </div>
+          <div class="grid three">
+            <div class="field">
+              <label for="startDate">开始日期</label>
+              <input id="startDate" type="date" value="2024-01-01">
+            </div>
+            <div class="field">
+              <label for="endDate">结束日期</label>
+              <input id="endDate" type="date" value="2024-03-01">
+            </div>
+            <div class="field">
+              <label for="maxResults">最大结果数</label>
+              <input id="maxResults" type="number" min="1" value="20">
+            </div>
+          </div>
+          <div class="grid three">
+            <div class="field">
+              <label for="processingLevel">产品级别</label>
+              <select id="processingLevel">
+                <option value="SLC" selected>SLC</option>
+                <option value="GRD_HD">GRD_HD</option>
+                <option value="GRD_MD">GRD_MD</option>
+                <option value="GRD_MS">GRD_MS</option>
+                <option value="OCN">OCN</option>
+              </select>
+            </div>
+            <div class="field">
+              <label for="beamMode">波束模式</label>
+              <select id="beamMode">
+                <option value="IW" selected>IW</option>
+                <option value="EW">EW</option>
+                <option value="WV">WV</option>
+              </select>
+            </div>
+            <div class="field">
+              <label for="flightDirection">轨道方向</label>
+              <select id="flightDirection">
+                <option value="">不限</option>
+                <option value="ASCENDING">ASCENDING</option>
+                <option value="DESCENDING">DESCENDING</option>
+              </select>
+            </div>
+          </div>
+          <div class="grid three">
+            <div class="field">
+              <label for="polarization">极化</label>
+              <input id="polarization" placeholder="VV+VH">
+            </div>
+            <div class="field">
+              <label for="relativeOrbit">相对轨道号</label>
+              <input id="relativeOrbit" type="number" min="1" placeholder="可留空">
+            </div>
+            <div class="field">
+              <label for="manifestPath">清单 CSV</label>
+              <input id="manifestPath" placeholder=".local-data\\mudanjiang\\manifest.csv">
+            </div>
+          </div>
+          <div class="toggle-row">
+            <label class="toggle">
+              <input id="rawRegion" type="checkbox">
+              <span>使用原始行政区边界</span>
+            </label>
+          </div>
+          <div class="chip-row" id="selectionSummary"></div>
+        </section>
+      </section>
+
+      <section class="layout two-col">
+        <section class="panel stack">
+          <div class="section-head">
+            <h2>下载参数</h2>
+            <button class="primary" id="queueDownloadBtn" type="button">启动下载</button>
+          </div>
+          <div class="grid two">
+            <div class="field">
+              <label for="dataDir">数据目录</label>
+              <input id="dataDir" value=".local-data\\mudanjiang\\data">
+            </div>
+            <div class="field">
+              <label for="orbitDir">轨道目录</label>
+              <input id="orbitDir" value=".local-data\\mudanjiang\\orbits">
+            </div>
+          </div>
+          <div class="grid three">
+            <label class="field">
+              <span>跳过产品</span>
+              <select id="skipData">
+                <option value="false" selected>否</option>
+                <option value="true">是</option>
+              </select>
+            </label>
+            <label class="field">
+              <span>跳过轨道</span>
+              <select id="skipOrbits">
+                <option value="false" selected>否</option>
+                <option value="true">是</option>
+              </select>
+            </label>
+            <div class="field">
+              <label for="downloadProcesses">并发数</label>
+              <input id="downloadProcesses" type="number" min="1" value="2">
+            </div>
+          </div>
+          <div class="toggle-row">
+            <label class="toggle">
+              <input id="ignoreOrbitErrors" type="checkbox">
+              <span>忽略轨道失败并允许任务成功结束</span>
+            </label>
+          </div>
+          <div class="grid two">
+            <div class="field">
+              <label for="earthdataUser">Earthdata 用户名</label>
+              <input id="earthdataUser" autocomplete="username" placeholder="可留空">
+            </div>
+            <div class="field">
+              <label for="earthdataPass">Earthdata 密码</label>
+              <input id="earthdataPass" type="password" autocomplete="current-password" placeholder="可留空">
+            </div>
+          </div>
+          <div class="toolbar">
+            <button class="ghost" id="saveEarthdataBtn" type="button">保存凭据</button>
+            <button class="ghost danger" id="clearEarthdataBtn" type="button">清除凭据</button>
+          </div>
+          <div class="chip-row" id="earthdataSummary"></div>
+          <div class="note">
+            下载原始 Sentinel-1 产品必须提供 Earthdata 用户名和密码。你可以手填后直接下载，也可以先保存到本地配置。当前阶段只下载原始产品包和匹配的 EOF 轨道文件，暂不包含 GeoTIFF 处理。
+          </div>
+        </section>
+
+        <section class="panel stack">
+          <div class="section-head">
+            <h2>任务</h2>
+            <div class="toolbar">
+              <button class="ghost" id="refreshJobsBtn" type="button">刷新任务</button>
+              <button class="ghost" id="refreshDetailBtn" type="button">刷新详情</button>
+              <button class="ghost danger" id="deleteJobBtn" type="button">删除选中</button>
+              <button class="ghost danger" id="clearJobsBtn" type="button">清空当前项目</button>
+            </div>
+          </div>
+          <div class="chip-row" id="jobFilterSummary"></div>
+          <div id="jobList" class="list tall"></div>
+        </section>
+      </section>
+
+      <section class="panel stack">
+        <div class="section-head">
+          <h2>任务详情</h2>
+        </div>
+        <div id="jobMeta" class="chip-row"></div>
+        <div class="detail-layout">
+          <div class="table-wrap">
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