feat: enhance TUI launcher with production-ready features and documentation

Major improvements to start-automaker.sh launcher script:

**Architecture & Code Quality:**
- Organized into logical sections with clear separators (8 sections)
- Extracted all magic numbers into named constants at top
- Added comprehensive comments throughout

**Functionality:**
- Dynamic version extraction from package.json (no manual updates)
- Pre-flight checks: validates Node.js, npm, tput installed
- Platform detection: warns on Windows/unsupported systems
- Terminal size validation: checks min 70x20, displays warning if too small
- Input timeout: 30-second auto-timeout for hands-free operation
- History tracking: remembers last selected mode in ~/.automaker_launcher_history

**User Experience:**
- Added --help flag with comprehensive usage documentation
- Added --version flag showing version, Node.js, Bash info
- Added --check-deps flag to verify project dependencies
- Added --no-colors flag for terminals without color support
- Added --no-history flag to disable history tracking
- Enhanced cleanup function: restores cursor + echo, better signal handling
- Better error messages with actionable remediation steps
- Improved exit experience: "Goodbye! See you soon." message

**Robustness:**
- Real initialization checks (validates node_modules, build artifacts)
- Spinner uses frame counting instead of infinite loop (max 1.6s)
- Proper signal trap handling (EXIT, INT, TERM)
- Error recovery: respects --no-colors in pre-flight checks

**File Management:**
- Renamed from "start automaker.sh" to "start-automaker.sh" for consistency
- Made script more portable with SCRIPT_DIR detection

**Documentation:**
- Added section to README.md: "Interactive TUI Launcher"
- Documented all launch modes and options with examples
- Added feature list, history file location, usage tips
- Updated table of contents with TUI launcher section

Fixes: #511 (CI test failures resolved)
Improvements: Better UX for new users, production-ready error handling

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

README.md

@@ -28,6 +28,7 @@
   - [Quick Start](#quick-start)
 - [How to Run](#how-to-run)
   - [Development Mode](#development-mode)
+  - [Interactive TUI Launcher](#interactive-tui-launcher-recommended-for-new-users)
   - [Building for Production](#building-for-production)
   - [Testing](#testing)
   - [Linting](#linting)
@@ -179,6 +180,40 @@ npm run dev:electron:wsl:gpu
 npm run dev:web
 ```
 
+### Interactive TUI Launcher (Recommended for New Users)
+
+For a user-friendly interactive menu, use the built-in TUI launcher script:
+
+```bash
+# Show interactive menu with all launch options
+./start-automaker.sh
+
+# Or launch directly without menu
+./start-automaker.sh web          # Web browser
+./start-automaker.sh electron     # Desktop app
+./start-automaker.sh electron-debug  # Desktop + DevTools
+
+# Additional options
+./start-automaker.sh --help       # Show all available options
+./start-automaker.sh --version    # Show version information
+./start-automaker.sh --check-deps # Verify project dependencies
+./start-automaker.sh --no-colors  # Disable colored output
+./start-automaker.sh --no-history # Don't remember last choice
+```
+
+**Features:**
+
+- 🎨 Beautiful terminal UI with gradient colors and ASCII art
+- ⌨️ Interactive menu (press 1-3 to select, Q to exit)
+- 💾 Remembers your last choice
+- ✅ Pre-flight checks (validates Node.js, npm, dependencies)
+- 📏 Responsive layout (adapts to terminal size)
+- ⏱️ 30-second timeout for hands-free selection
+- 🌐 Cross-shell compatible (bash/zsh)
+
+**History File:**
+Your last selected mode is saved in `~/.automaker_launcher_history` for quick re-runs.
+
 ### Building for Production
 
 #### Web Application