feat: major platform expansion — Brain service, RSS reader, iOS app, AI assistants, Firefox extension

Brain Service:
- Playwright stealth crawler replacing browserless (og:image, Readability, Reddit JSON API)
- AI classification with tag definitions and folder assignment
- YouTube video download via yt-dlp
- Karakeep migration complete (96 items)
- Taxonomy management (folders with icons/colors, tags)
- Discovery shuffle, sort options, search (Meilisearch + pgvector)
- Item tag/folder editing, card color accents

RSS Reader Service:
- Custom FastAPI reader replacing Miniflux
- Feed management (add/delete/refresh), category support
- Full article extraction via Readability
- Background content fetching for new entries
- Mark all read with confirmation
- Infinite scroll, retention cleanup (30/60 day)
- 17 feeds migrated from Miniflux

iOS App (SwiftUI):
- Native iOS 17+ app with @Observable architecture
- Cookie-based auth, configurable gateway URL
- Dashboard with custom background photo + frosted glass widgets
- Full fitness module (today/templates/goals/food library)
- AI assistant chat (fitness + brain, raw JSON state management)
- 120fps ProMotion support

AI Assistants (Gateway):
- Unified dispatcher with fitness/brain domain detection
- Fitness: natural language food logging, photo analysis, multi-item splitting
- Brain: save/append/update/delete notes, search & answer, undo support
- Madiha user gets fitness-only (brain disabled)

Firefox Extension:
- One-click save to Brain from any page
- Login with platform credentials
- Right-click context menu (save page/link/image)
- Notes field for URL saves
- Signed and published on AMO

Other:
- Reader bookmark button routes to Brain (was Karakeep)
- Fitness food library with "Add" button + add-to-meal popup
- Kindle send file size check (25MB SMTP2GO limit)
- Atelier UI as default (useAtelierShell=true)
- Mobile upload box in nav drawer

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend-v2/src/routes/(app)/+layout.server.ts

@@ -6,7 +6,7 @@ const gatewayUrl = env.GATEWAY_URL || 'http://localhost:8100';
 
 export const load: LayoutServerLoad = async ({ cookies, url }) => {
 	const host = url.host.toLowerCase();
-	const useAtelierShell = host.includes(':4174') || host.startsWith('test.');
+	const useAtelierShell = true;
 	const session = cookies.get('platform_session');
 	if (!session) {
 		throw redirect(302, `/login?redirect=${encodeURIComponent(url.pathname)}`);
@@ -26,7 +26,7 @@ export const load: LayoutServerLoad = async ({ cookies, url }) => {
 				// Hiding reduces clutter for users who don't need certain apps day-to-day.
 				const allApps = ['tasks', 'trips', 'fitness', 'inventory', 'budget', 'reader', 'media', 'brain'];
 				const hiddenByUser: Record<string, string[]> = {
-					'madiha': ['inventory', 'reader'],
+					'madiha': ['inventory', 'reader', 'brain'],
 				};
 				const hidden = hiddenByUser[data.user.username] || [];
 				const visibleApps = allApps.filter(a => !hidden.includes(a));

frontend-v2/src/routes/(app)/+layout.svelte

@@ -10,6 +10,7 @@
 	let assistantEntryDate = $state<string | null>(null);
 	const visibleApps = data?.visibleApps || ['trips', 'fitness', 'inventory', 'budget', 'reader', 'media'];
 	const userName = data?.user?.display_name || '';
+	const assistantBrainEnabled = data?.user?.username !== 'madiha';
 	const useAtelierShell = data?.useAtelierShell || false;
 
 	function openCommand() {
@@ -40,7 +41,7 @@
 	<AppShell onOpenCommand={openCommand} {visibleApps} {userName}>
 		{@render children()}
 	</AppShell>
-	<FitnessAssistantDrawer bind:open={commandOpen} onclose={closeCommand} entryDate={assistantEntryDate} />
+	<FitnessAssistantDrawer bind:open={commandOpen} onclose={closeCommand} entryDate={assistantEntryDate} allowBrain={assistantBrainEnabled} />
 {:else}
 	<div class="app">
 		<Navbar onOpenCommand={openCommand} {visibleApps} />