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/packages/chat-types/src/index.ts

@@ -64,19 +64,45 @@ export interface ChatCompletionResponse {
 // Template Types
 export interface Template {
   id: string;
+  user_id: string;
   name: string;
-  description: string;
+  description: string | null;
   system_prompt: string;
+  initial_question: string | null;
+  model_id: string | null;
+  color: string;
+  is_default: boolean;
+  document_mode: boolean;
   created_at: string;
   updated_at: string;
 }
 
+export type TemplateCreate = Omit<Template, 'id' | 'created_at' | 'updated_at'>;
+export type TemplateUpdate = Partial<Omit<Template, 'id' | 'user_id' | 'created_at' | 'updated_at'>>;
+
 // Space Types
 export interface Space {
   id: string;
   name: string;
   description?: string;
   owner_id: string;
+  is_archived: boolean;
+  created_at: string;
+  updated_at: string;
+}
+
+export type SpaceCreate = Pick<Space, 'name' | 'description' | 'owner_id'>;
+export type SpaceUpdate = Partial<Pick<Space, 'name' | 'description' | 'is_archived'>>;
+
+export interface SpaceMember {
+  id: string;
+  space_id: string;
+  user_id: string;
+  role: 'owner' | 'admin' | 'member' | 'viewer';
+  invitation_status: 'pending' | 'accepted' | 'declined';
+  invited_by?: string;
+  invited_at: string;
+  joined_at?: string;
   created_at: string;
   updated_at: string;
 }
@@ -85,9 +111,12 @@ export interface Space {
 export interface Document {
   id: string;
   conversation_id: string;
-  title: string;
   content: string;
   version: number;
   created_at: string;
   updated_at: string;
 }
+
+export interface DocumentWithConversation extends Document {
+  conversation_title: string;
+}