Proxy auth UI, verbose Live logs, build script, docs

- Fixed exit and manual chain: optional user/pass fields with URL merge and redaction in UI/logs
- config: split_proxy_for_edit, merge_proxy_credentials, redact_proxy_url, IPv6-style host bracketing
- Live tab: UILogHandler to stream proxy_chain_manager logs; Verbose toggle; Clear log; httpx quiet
- service/validator/fetcher: structured INFO/DEBUG for pool, GOST, validation, fetches
- setup_and_build.ps1: pip upgrade, deps, PyInstaller, desktop copy + shortcut; build_exe.bat delegates
- README: clone/pull to one-script desktop build flow

Made-with: Cursor

build_exe.bat

@@ -1,22 +1,6 @@
 @echo off
 setlocal
 cd /d "%~dp0"
-
-python -m pip install -r requirements.txt
-python -m pip install pyinstaller
-
-python -m PyInstaller --noconfirm --clean ^
-  --onefile --windowed ^
-  --uac-admin ^
-  --name ProxyChainManager ^
-  --collect-all customtkinter ^
-  --hidden-import pystray._win32 ^
-  run.py
-
-copy /Y "dist\ProxyChainManager.exe" "%USERPROFILE%\Desktop\ProxyChainManager.exe" >nul
-powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0scripts\create_desktop_shortcut.ps1"
-echo.
-echo Built: dist\ProxyChainManager.exe
-echo Desktop: ProxyChainManager.exe  +  shortcut "Proxy God.lnk"
+powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0scripts\setup_and_build.ps1"
+if errorlevel 1 exit /b 1
 endlocal
-