docs: add testing guides and phase summaries

- Add AI quick start guide (START-HERE-FOR-AI.md)
- Add Phase 1-3 testing guides and summaries
- Add feature testing documentation (review, citation)
- Add environment check scripts
- Add one-click startup script
- Add test user initialization scripts
- Add testing records and issue tracking

stop-all-services.bat

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+@echo off
+echo ========================================
+echo   Stop All Services
+echo ========================================
+echo.
+
+echo [1] Stopping backend service (port 3001)...
+for /f "tokens=5" %%a in ('netstat -aon ^| findstr :3001') do (
+    set PID=%%a
+    echo Found process: PID=%%a
+    taskkill /F /PID %%a >nul 2>&1
+    if errorlevel 1 (
+        echo ERROR: Cannot terminate process %%a
+    ) else (
+        echo OK: Process %%a terminated
+    )
+)
+
+echo.
+echo [2] Stopping frontend service (port 5173)...
+for /f "tokens=5" %%a in ('netstat -aon ^| findstr :5173') do (
+    set PID=%%a
+    echo Found process: PID=%%a
+    taskkill /F /PID %%a >nul 2>&1
+    if errorlevel 1 (
+        echo ERROR: Cannot terminate process %%a
+    ) else (
+        echo OK: Process %%a terminated
+    )
+)
+
+echo.
+echo [3] Stopping Python service (port 8000)...
+for /f "tokens=5" %%a in ('netstat -aon ^| findstr :8000') do (
+    set PID=%%a
+    echo Found process: PID=%%a
+    taskkill /F /PID %%a >nul 2>&1
+    if errorlevel 1 (
+        echo ERROR: Cannot terminate process %%a
+    ) else (
+        echo OK: Process %%a terminated
+    )
+)
+
+echo.
+echo [4] Terminating all Node processes...
+tasklist | findstr node.exe >nul
+if not errorlevel 1 (
+    echo Found Node processes, terminating...
+    taskkill /F /IM node.exe >nul 2>&1
+    if errorlevel 1 (
+        echo ERROR: Cannot terminate Node processes
+    ) else (
+        echo OK: All Node processes terminated
+    )
+) else (
+    echo INFO: No running Node processes
+)
+
+echo.
+echo [5] Terminating Python processes (uvicorn)...
+tasklist | findstr python.exe >nul
+if not errorlevel 1 (
+    echo Found Python processes, terminating...
+    taskkill /F /IM python.exe >nul 2>&1
+    if errorlevel 1 (
+        echo ERROR: Cannot terminate Python processes
+    ) else (
+        echo OK: All Python processes terminated
+    )
+) else (
+    echo INFO: No running Python processes
+)
+
+echo.
+echo ========================================
+echo   Cleanup Complete!
+echo ========================================
+echo.
+echo All services stopped. You can restart them now.
+echo.
+pause
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