Make pages load fast on mobile

- Compress responses: page scripts and styles once (brotli or gzip, in
  memory) and cached immutable; pages and API JSON gzipped as they stream
- Service worker serves content-named assets cache-first
- Load the models modal's data when it opens (cached in localStorage)
  instead of shipping the model catalog in every conversation page
- Lazy-load the Tiptap composer and memoize thread messages
- Import lucide icons directly; twui 0.1.4 drops by-name icons from Button
- bun run start builds the pages minified before serving

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/types/index.ts

@@ -640,6 +640,14 @@ export type BotVoicePayload = {
     speech: boolean;
 };
 
+/**
+ * The text model a conversation's bot runs on now, for its header.
+ */
+export type BotTextModel = {
+    name: string;
+    provider_name: string;
+};
+
 export type PagePropsType = {
     user?: User | null;
     user_types?: BUN_SQLITE_COBBLE_USER_TYPES[] | null;
@@ -724,6 +732,11 @@ export type PagePropsType = {
      * (speech) are turned on for the bot there.
      */
     bot_voice?: BotVoicePayload | null;
+    /**
+     * The open conversation's text model (its header). The full model
+     * settings load when the models modal opens.
+     */
+    bot_text_model?: BotTextModel | null;
     workspace_extensions?: BotExtensionsPayload | null;
     envs?: {
         GOOGLE_CLIENT_ID?: string;