chore: sync CI/CD with upstream guide and update context docs

release.yml: add fallback for existing releases on tag re-push.
installer.nsi: add .onInit file lock check, use LaunchApp function
instead of RUN_PARAMETERS to fix NSIS quoting bug.
build-dist.ps1: copy start-hidden.vbs to dist scripts/.
start-hidden.vbs: embedded Python fallback for installed/dev envs.

Update ci-cd.md with version detection, NSIS best practices, local
build testing, Gitea vs GitHub differences, troubleshooting.
Update frontend.md with full entity type checklist and common pitfalls.

build-dist.ps1

@@ -130,7 +130,7 @@ if ($LASTEXITCODE -ne 0) { throw "Failed to install pip" }
 # ── Install dependencies ──────────────────────────────────────
 
 Write-Host "[5/8] Installing dependencies..."
-$extras = "camera,notifications"
+$extras = "camera,notifications,tray"
 if (-not $SkipPerf) { $extras += ",perf" }
 
 # Install the project (pulls all deps via pyproject.toml), then remove
@@ -202,7 +202,6 @@ Write-Host "[8/8] Creating launcher..."
 
 $launcherContent = @'
 @echo off
-title LedGrab v%VERSION%
 cd /d "%~dp0"
 
 :: Set paths
@@ -213,24 +212,19 @@ set WLED_CONFIG_PATH=%~dp0app\config\default_config.yaml
 if not exist "%~dp0data" mkdir "%~dp0data"
 if not exist "%~dp0logs" mkdir "%~dp0logs"
 
-echo.
-echo  =============================================
-echo   LedGrab v%VERSION%
-echo   Open http://localhost:8080 in your browser
-echo  =============================================
-echo.
-
-:: Start the server (open browser after short delay)
-start "" /b cmd /c "timeout /t 2 /nobreak >nul && start http://localhost:8080"
-"%~dp0python\python.exe" -m uvicorn wled_controller.main:app --host 0.0.0.0 --port 8080
-
-pause
+:: Start the server (tray icon handles UI and exit)
+"%~dp0python\pythonw.exe" -m wled_controller
 '@
 
 $launcherContent = $launcherContent -replace '%VERSION%', $VersionClean
 $launcherPath = Join-Path $DistDir "LedGrab.bat"
 Set-Content -Path $launcherPath -Value $launcherContent -Encoding ASCII
 
+# Copy hidden launcher VBS
+$scriptsDir = Join-Path $DistDir "scripts"
+New-Item -ItemType Directory -Path $scriptsDir -Force | Out-Null
+Copy-Item -Path (Join-Path $ServerDir "scripts\start-hidden.vbs") -Destination $scriptsDir
+
 # ── Create ZIP ─────────────────────────────────────────────────
 
 $ZipPath = Join-Path $BuildDir $ZipName