Fix code quality violations and exclude Manifest from checks

Document application modes (development/debug/production)
Add global file drop handler, order column normalization, SPA hash fix
Serve CDN assets via /_vendor/ URLs instead of merging into bundles
Add production minification with license preservation
Improve JSON formatting for debugging and production optimization
Add CDN asset caching with CSS URL inlining for production builds
Add three-mode system (development, debug, production)
Update Manifest CLAUDE.md to reflect helper class architecture
Refactor Manifest.php into helper classes for better organization
Pre-manifest-refactor checkpoint: Add app_mode documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docs/CLAUDE.dist.md

@@ -216,6 +216,36 @@ Merged via `array_merge_deep()`. Common overrides: `development.auto_rename_file
 
 ---
 
+## APPLICATION MODES
+
+Three modes control build behavior: `development`, `debug`, `production`.
+
+**Switch modes**: `php artisan rsx:mode:set dev|debug|prod`
+
+| Behavior | Development | Debug | Production |
+|----------|-------------|-------|------------|
+| Auto-rebuild on file change | Yes | No | No |
+| Minification (JS/CSS) | No | Yes | Yes |
+| Inline sourcemaps | Yes | Yes | No |
+| console_debug() works | Yes | Yes | Stripped |
+| Bundle merging | No | No | Yes (single app.js/css) |
+| CDN assets | External URLs | External URLs | Cached & bundled |
+
+**Development**: Active coding - files auto-compile, full debugging.
+
+**Debug**: Test production-like build locally - minified but with sourcemaps and working console_debug.
+
+**Production**: Optimized deployment - everything merged, minified, debug code stripped.
+
+**Build commands**:
+- `rsx:mode:set` - Switch mode and rebuild
+- `rsx:prod:build` - Rebuild for debug/production
+- `rsx:prod:export` - Export deployable package
+
+**Environment**: `RSX_MODE` in `.env` (default: `development`)
+
+---
+
 ## ROUTING & CONTROLLERS
 
 ```php