feat(ui): persist user settings and audio position across sessions

- Replace double inline player controls with compact 'now playing' indicator when mini-bar is active
- Add user_settings PocketBase collection (auto_next, voice, speed) and audio_time field on progress
- Add getSettings/saveSettings/setAudioTime/getAudioTime server functions
- Add GET/PUT /api/settings and GET/PATCH /api/progress/audio-time API routes
- Load settings server-side in layout and apply to audioStore on mount
- Debounced 800ms effect persists settings changes to DB
- Save audio currentTime on pause/end; restore position when replaying a chapter

ui/src/routes/+layout.server.ts

@@ -1,5 +1,7 @@
 import { redirect } from '@sveltejs/kit';
 import type { LayoutServerLoad } from './$types';
+import { getSettings } from '$lib/server/pocketbase';
+import { log } from '$lib/server/logger';
 
 // Routes that are accessible without being logged in
 const PUBLIC_ROUTES = new Set(['/login']);
@@ -9,7 +11,22 @@ export const load: LayoutServerLoad = async ({ locals, url }) => {
 		redirect(302, `/login`);
 	}
 
+	let settings = { autoNext: false, voice: 'af_bella', speed: 1.0 };
+	try {
+		const row = await getSettings(locals.sessionId, locals.user?.id);
+		if (row) {
+			settings = {
+				autoNext: row.auto_next ?? false,
+				voice: row.voice ?? 'af_bella',
+				speed: row.speed ?? 1.0
+			};
+		}
+	} catch (e) {
+		log.warn('layout', 'failed to load settings', { err: String(e) });
+	}
+
 	return {
-		user: locals.user
+		user: locals.user,
+		settings
 	};
 };