v0.5.0: Binary-Free Mode - No OpenCode binary required

✨ Major Features:
- Native session management without OpenCode binary
- Provider routing: OpenCode Zen (free), Qwen OAuth, Z.AI
- Streaming chat with tool execution loop
- Mode detection API (/api/meta/mode)
- MCP integration fix (resolved infinite loading)
- NomadArch Native option in UI with comparison info

🆓 Free Models (No API Key):
- GPT-5 Nano (400K context)
- Grok Code Fast 1 (256K context)
- GLM-4.7 (205K context)
- Doubao Seed Code (256K context)
- Big Pickle (200K context)

📦 New Files:
- session-store.ts: Native session persistence
- native-sessions.ts: REST API for sessions
- lite-mode.ts: UI mode detection client
- native-sessions.ts (UI): SolidJS store

🔧 Updated:
- All installers: Optional binary download
- All launchers: Mode detection display
- Binary selector: Added NomadArch Native option
- README: Binary-Free Mode documentation

Launch-Windows.bat

@@ -6,7 +6,7 @@ color 0A
 
 echo.
 echo NomadArch Launcher (Windows)
-echo Version: 0.4.0
+echo Version: 0.5.0 - Binary-Free Mode
 echo.
 
 set SCRIPT_DIR=%~dp0
@@ -16,6 +16,7 @@ cd /d "%SCRIPT_DIR%"
 set ERRORS=0
 set WARNINGS=0
 set AUTO_FIXED=0
+set BINARY_FREE_MODE=0
 
 echo [PREFLIGHT 1/7] Checking Dependencies...
 
@@ -42,18 +43,18 @@ for /f "tokens=*" %%i in ('npm --version') do set NPM_VERSION=%%i
 echo [OK] npm: %NPM_VERSION%
 
 echo.
-echo [PREFLIGHT 2/7] Checking for OpenCode CLI...
+echo [PREFLIGHT 2/7] Checking OpenCode CLI (Optional)...
 
 where opencode >nul 2>&1
 if %ERRORLEVEL% equ 0 (
-    echo [OK] OpenCode CLI available in PATH
+    echo [OK] OpenCode CLI available in PATH - Full Mode
 ) else (
     if exist "bin\opencode.exe" (
-        echo [OK] OpenCode binary found in bin/
+        echo [OK] OpenCode binary found in bin/ - Full Mode
     ) else (
-        echo [WARN] OpenCode CLI not found
-        echo [INFO] Run Install-Windows.bat to set up OpenCode
-        set /a WARNINGS+=1
+        echo [INFO] OpenCode CLI not found - Using Binary-Free Mode
+        echo [INFO] Free models (GPT-5 Nano, Grok Code, GLM-4.7) available via OpenCode Zen
+        set BINARY_FREE_MODE=1
     )
 )
 
@@ -139,6 +140,12 @@ echo [STATUS]
 echo.
 echo   Node.js: %NODE_VERSION%
 echo   npm: %NPM_VERSION%
+if %BINARY_FREE_MODE% equ 1 (
+    echo   Mode: Binary-Free Mode ^(No OpenCode binary required^)
+    echo   Free Models: GPT-5 Nano, Grok Code, GLM-4.7, Doubao, Big Pickle
+) else (
+    echo   Mode: Full Mode ^(OpenCode binary available^)
+)
 echo   Auto-fixes applied: !AUTO_FIXED!
 echo   Warnings: %WARNINGS%
 echo   Errors: %ERRORS%
@@ -181,6 +188,7 @@ echo ========================================
 
 set "VITE_DEV_SERVER_URL=http://localhost:!UI_PORT!"
 set "NOMADARCH_OPEN_DEVTOOLS=false"
+set "NOMADARCH_BINARY_FREE_MODE=%BINARY_FREE_MODE%"
 call npm run dev:electron
 
 if %ERRORLEVEL% neq 0 (