feat: replace emoji icons with Lucide SVG system

This commit completes the comprehensive migration from emoji and text-based icons to Lucide SVG icons throughout the entire application. This modernization improves visual consistency, accessibility, and provides better sizing control across all UI components.

**Main Application:**
- Migrated loading overlay success (✓) and error (✕) icons to lucide check-circle and x-circle
- Updated component registry with semantic icon names (camera, gamepad-2, box, printer, thermometer, wind, info, scroll-text)
- Converted edit mode indicator to use lucide pencil icon
- Removed legacy CSS icon pseudo-elements from shortcut buttons

**Dialogs:**
- Component dialog: Migrated header icon to dynamic Lucide rendering with proper hydration
- Material info dialog: Converted Material Station indicator to lucide factory icon
- Material matching dialog: Replaced text × with lucide x icon for remove buttons
- Settings dialog: Updated macOS warning icon to lucide alert-triangle
- Shortcut config: Migrated all component icons to Lucide with proper rendering

**Components:**
- Palette: Updated component icons, pinned (pin), and in-grid (check) status badges
- Log panel: Converted title icon to lucide scroll-text
- Edit mode controller: Replaced emoji pencil with Lucide icon

**WebUI:**
- Implemented Lucide icon hydration utilities (toPascalCase, hydrateLucideIcons)
- Migrated edit mode lock/unlock toggle to dynamic lucide lock/unlock icons
- Updated settings icon initialization

**Logger:**
- Replaced emoji checkmark (✓) and cross (✗) with text prefixes [OK] and [FAIL] for better terminal compatibility

**Additional:**
- Added new WebUI push notifications specification document
- Updated Claude settings to allow chrome.com WebFetch for development

All Lucide icons now use consistent sizing (stroke-width: 2) and proper ARIA attributes for accessibility.

Author: GhostTypes

.claude/settings.local.json

@@ -85,7 +85,8 @@
       "WebFetch(domain:fftrac-bg.ffmpeg.org)",
       "WebFetch(domain:ffmpeg.org)",
       "WebFetch(domain:lucide.dev)",
-      "mcp__context7__get-library-docs"
+      "mcp__context7__get-library-docs",
+      "WebFetch(domain:developer.chrome.com)"
     ],
     "deny": [],
     "additionalDirectories": [