music: per-user Favorites + Currently-playing (platform/Postgres)

User-level state for the music app, served by the platform from Postgres (not
the sidecar, which is stateless about users) under the same /api/music prefix
so the music-app account gate permits it:

- music_favorites (userId, kind, key) — kind ∈ track|album|artist, opaque path
  key the server never interprets; unique per (user,kind,key), newest-first.
  GET /favorites (grouped), POST /favorites (idempotent), DELETE /favorites.
- music_now_playing (one row/user) — current track + position snapshot for
  resume-across-launch/device, with a light title/artist/album cache so the
  resume card renders before the library index syncs.
  GET/PUT/DELETE /now-playing (upsert).

Routes registered before the catch-all proxy. Tables created via direct DDL;
query layer smoke-tested against the live DB. MUSIC_API.md documents the
contract for the app. App-side wiring (heart toggles, Favorites view, player
persistence) follows next.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/databases/officer_db/src/index.ts

@@ -79,5 +79,15 @@ export {
 
 export { appendChatEvent, getChatEventsSince, pruneChatEventsOlderThan } from './queries/chat-events';
 
+export {
+  getMusicFavorites,
+  addMusicFavorite,
+  removeMusicFavorite,
+  getNowPlaying,
+  setNowPlaying,
+  clearNowPlaying,
+} from './queries/music';
+export type { FavoriteKind, GroupedFavorites, NowPlaying, NowPlayingInput } from './queries/music';
+
 export { db } from './db';
 export * as schema from './schema';

src/databases/officer_db/src/queries/music.ts

@@ -0,0 +1,109 @@
+import { eq, and, desc } from 'drizzle-orm';
+import { db } from '../db';
+import { musicFavorites, musicNowPlaying } from '../schema';
+
+export type FavoriteKind = 'track' | 'album' | 'artist';
+export type GroupedFavorites = { tracks: string[]; albums: string[]; artists: string[] };
+
+/** All of a user's favorites, grouped by kind, newest first within each group. */
+export async function getMusicFavorites(userId: number): Promise<GroupedFavorites> {
+  const rows = await db
+    .select({ kind: musicFavorites.kind, key: musicFavorites.key })
+    .from(musicFavorites)
+    .where(eq(musicFavorites.userId, userId))
+    .orderBy(desc(musicFavorites.createdAt));
+  const grouped: GroupedFavorites = { tracks: [], albums: [], artists: [] };
+  for (const r of rows) {
+    if (r.kind === 'track') grouped.tracks.push(r.key);
+    else if (r.kind === 'album') grouped.albums.push(r.key);
+    else if (r.kind === 'artist') grouped.artists.push(r.key);
+  }
+  return grouped;
+}
+
+/** Add a favorite (idempotent — a repeat add is a no-op via the unique constraint). */
+export async function addMusicFavorite(userId: number, kind: FavoriteKind, key: string): Promise<void> {
+  await db.insert(musicFavorites).values({ userId, kind, key }).onConflictDoNothing();
+}
+
+/** Remove a favorite (no-op if it wasn't set). */
+export async function removeMusicFavorite(userId: number, kind: FavoriteKind, key: string): Promise<void> {
+  await db
+    .delete(musicFavorites)
+    .where(and(eq(musicFavorites.userId, userId), eq(musicFavorites.kind, kind), eq(musicFavorites.key, key)));
+}
+
+export type NowPlaying = {
+  homePath: string;
+  dir: string;
+  title: string;
+  artist: string;
+  album: string;
+  durationSec: number;
+  positionSec: number;
+  updatedAt: Date;
+};
+
+export type NowPlayingInput = {
+  homePath: string;
+  dir?: string;
+  title?: string;
+  artist?: string;
+  album?: string;
+  durationSec?: number;
+  positionSec?: number;
+};
+
+/** The user's last "currently playing" snapshot, or null if none. */
+export async function getNowPlaying(userId: number): Promise<NowPlaying | null> {
+  const [row] = await db
+    .select({
+      homePath: musicNowPlaying.homePath,
+      dir: musicNowPlaying.dir,
+      title: musicNowPlaying.title,
+      artist: musicNowPlaying.artist,
+      album: musicNowPlaying.album,
+      durationSec: musicNowPlaying.durationSec,
+      positionSec: musicNowPlaying.positionSec,
+      updatedAt: musicNowPlaying.updatedAt,
+    })
+    .from(musicNowPlaying)
+    .where(eq(musicNowPlaying.userId, userId));
+  return row ?? null;
+}
+
+/** Upsert the user's "currently playing" snapshot (one row per user). */
+export async function setNowPlaying(userId: number, np: NowPlayingInput): Promise<void> {
+  const values = {
+    userId,
+    homePath: np.homePath,
+    dir: np.dir ?? '',
+    title: np.title ?? '',
+    artist: np.artist ?? '',
+    album: np.album ?? '',
+    durationSec: np.durationSec ?? 0,
+    positionSec: np.positionSec ?? 0,
+    updatedAt: new Date(),
+  };
+  await db
+    .insert(musicNowPlaying)
+    .values(values)
+    .onConflictDoUpdate({
+      target: musicNowPlaying.userId,
+      set: {
+        homePath: values.homePath,
+        dir: values.dir,
+        title: values.title,
+        artist: values.artist,
+        album: values.album,
+        durationSec: values.durationSec,
+        positionSec: values.positionSec,
+        updatedAt: values.updatedAt,
+      },
+    });
+}
+
+/** Clear the user's "currently playing" (on close/stop). */
+export async function clearNowPlaying(userId: number): Promise<void> {
+  await db.delete(musicNowPlaying).where(eq(musicNowPlaying.userId, userId));
+}

src/databases/officer_db/src/schema/index.ts

@@ -6,3 +6,4 @@ export * from './server';
 export * from './email';
 export * from './pipeline-jobs';
 export * from './chat-events';
+export * from './music';

src/databases/officer_db/src/schema/music.ts

@@ -0,0 +1,37 @@
+import { pgTable, serial, integer, text, real, timestamp, unique, index } from 'drizzle-orm/pg-core';
+import { users } from './auth';
+
+// Per-user music favorites. `key` is an opaque path the app supplies and the server never interprets:
+//   track  → homePath  "Music/<rel>/<file>"   (also the /stream path + RNTP queue id)
+//   album  → music-rel "Albums/AC-DC/[1980] Back in Black"
+//   artist → music-rel "Albums/AC-DC"
+export const musicFavorites = pgTable(
+  'music_favorites',
+  {
+    id: serial('id').primaryKey(),
+    userId: integer('user_id').notNull().references(() => users.id, { onDelete: 'cascade' }),
+    kind: text('kind').notNull(), // 'track' | 'album' | 'artist'
+    key: text('key').notNull(),
+    createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  },
+  (t) => [
+    unique('uq_music_favorites_user_kind_key').on(t.userId, t.kind, t.key),
+    index('idx_music_favorites_user_kind').on(t.userId, t.kind),
+  ],
+);
+
+// Per-user "currently playing" for resume-across-launch/device: the current track + playback position,
+// plus a light metadata snapshot so the resume card renders before the library index has synced on a
+// fresh device. `dir` is the folder to rebuild the album queue from ('' for a cross-album queue). One
+// row per user (upserted; the app writes it throttled while playing and on pause/track-change/close).
+export const musicNowPlaying = pgTable('music_now_playing', {
+  userId: integer('user_id').primaryKey().references(() => users.id, { onDelete: 'cascade' }),
+  homePath: text('home_path').notNull(),
+  dir: text('dir').notNull().default(''),
+  title: text('title').notNull().default(''),
+  artist: text('artist').notNull().default(''),
+  album: text('album').notNull().default(''),
+  durationSec: real('duration_sec').notNull().default(0),
+  positionSec: real('position_sec').notNull().default(0),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
+});