feat(chat): add SvelteKit web app with full feature parity to mobile

Web app features:
- Auth: Login, Register, Forgot Password with shared-auth-ui
- Chat: New chat, conversation view, message list, model selector
- Templates: List, create, edit, delete templates
- Spaces: Team workspaces with member management
- Documents: Document mode with version history
- Archive & Profile pages

Technical:
- SvelteKit 2 with Svelte 5 runes
- Tailwind CSS 4 with shared themes
- Supabase Auth with SSR
- ChatLogo added to shared-branding
- dev:*:app commands for web+backend

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

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

chat/apps/web/package.json

@@ -27,6 +27,7 @@
     "vite": "^7.1.7"
   },
   "dependencies": {
+    "@chat/types": "workspace:*",
     "@manacore/shared-auth-ui": "workspace:*",
     "@manacore/shared-branding": "workspace:*",
     "@manacore/shared-i18n": "workspace:*",
@@ -36,6 +37,8 @@
     "@manacore/shared-theme": "workspace:*",
     "@manacore/shared-theme-ui": "workspace:*",
     "@manacore/shared-ui": "workspace:*",
+    "@manacore/shared-utils": "workspace:*",
+    "@supabase/ssr": "^0.6.1",
     "@supabase/supabase-js": "^2.81.1",
     "marked": "^17.0.0"
   }