feat(stats): build per-title librarySummary from daily rollups and sessions

src/core/services/immersion-tracker/__tests__/query.test.ts

@@ -3725,3 +3725,119 @@ test('deleteSession removes zero-session media from library and trends', () => {
     cleanupDbPath(dbPath);
   }
 });
+
+test('getTrendsDashboard builds librarySummary with per-title aggregates', () => {
+  const dbPath = makeDbPath();
+  const db = new Database(dbPath);
+
+  try {
+    ensureSchema(db);
+    const stmts = createTrackerPreparedStatements(db);
+
+    const videoId = getOrCreateVideoRecord(db, 'local:/tmp/library-summary-test.mkv', {
+      canonicalTitle: 'Library Summary Test',
+      sourcePath: '/tmp/library-summary-test.mkv',
+      sourceUrl: null,
+      sourceType: SOURCE_TYPE_LOCAL,
+    });
+    const animeId = getOrCreateAnimeRecord(db, {
+      parsedTitle: 'Summary Anime',
+      canonicalTitle: 'Summary Anime',
+      anilistId: null,
+      titleRomaji: null,
+      titleEnglish: null,
+      titleNative: null,
+      metadataJson: null,
+    });
+    linkVideoToAnimeRecord(db, videoId, {
+      animeId,
+      parsedBasename: 'library-summary-test.mkv',
+      parsedTitle: 'Summary Anime',
+      parsedSeason: 1,
+      parsedEpisode: 1,
+      parserSource: 'test',
+      parserConfidence: 1,
+      parseMetadataJson: null,
+    });
+
+    const dayOneStart = 1_700_000_000_000;
+    const dayTwoStart = dayOneStart + 86_400_000;
+
+    const sessionOne = startSessionRecord(db, videoId, dayOneStart);
+    const sessionTwo = startSessionRecord(db, videoId, dayTwoStart);
+
+    for (const [sessionId, startedAtMs, activeMs, cards, tokens, lookups] of [
+      [sessionOne.sessionId, dayOneStart, 30 * 60_000, 2, 120, 8],
+      [sessionTwo.sessionId, dayTwoStart, 45 * 60_000, 3, 140, 10],
+    ] as const) {
+      stmts.telemetryInsertStmt.run(
+        sessionId,
+        `${startedAtMs + 60_000}`,
+        activeMs,
+        activeMs,
+        10,
+        tokens,
+        cards,
+        0,
+        0,
+        lookups,
+        0,
+        0,
+        0,
+        0,
+        `${startedAtMs + 60_000}`,
+        `${startedAtMs + 60_000}`,
+      );
+
+      db.prepare(
+        `
+          UPDATE imm_sessions
+          SET ended_at_ms = ?, total_watched_ms = ?, active_watched_ms = ?,
+              lines_seen = ?, tokens_seen = ?, cards_mined = ?, yomitan_lookup_count = ?
+          WHERE session_id = ?
+        `,
+      ).run(
+        `${startedAtMs + activeMs}`,
+        activeMs,
+        activeMs,
+        10,
+        tokens,
+        cards,
+        lookups,
+        sessionId,
+      );
+    }
+
+    for (const [day, active, tokens, cards] of [
+      [Math.floor(dayOneStart / 86_400_000), 30, 120, 2],
+      [Math.floor(dayTwoStart / 86_400_000), 45, 140, 3],
+    ] as const) {
+      db.prepare(
+        `
+          INSERT INTO imm_daily_rollups (
+            rollup_day, video_id, total_sessions, total_active_min, total_lines_seen,
+            total_tokens_seen, total_cards
+          ) VALUES (?, ?, ?, ?, ?, ?, ?)
+        `,
+      ).run(day, videoId, 1, active, 10, tokens, cards);
+    }
+
+    const dashboard = getTrendsDashboard(db, 'all', 'day');
+
+    assert.equal(dashboard.librarySummary.length, 1);
+    const row = dashboard.librarySummary[0]!;
+    assert.equal(row.title, 'Summary Anime');
+    assert.equal(row.watchTimeMin, 75);
+    assert.equal(row.videos, 1);
+    assert.equal(row.sessions, 2);
+    assert.equal(row.cards, 5);
+    assert.equal(row.words, 260);
+    assert.equal(row.lookups, 18);
+    assert.equal(row.lookupsPerHundred, +((18 / 260) * 100).toFixed(1));
+    assert.equal(row.firstWatched, Math.floor(dayOneStart / 86_400_000));
+    assert.equal(row.lastWatched, Math.floor(dayTwoStart / 86_400_000));
+  } finally {
+    db.close();
+    cleanupDbPath(dbPath);
+  }
+});

src/core/services/immersion-tracker/query-trends.ts

@@ -405,6 +405,89 @@ function buildCumulativePerAnime(points: TrendPerAnimePoint[]): TrendPerAnimePoi
   return result;
 }
 
+function buildLibrarySummary(
+  rollups: ImmersionSessionRollupRow[],
+  sessions: TrendSessionMetricRow[],
+  titlesByVideoId: Map<number, string>,
+): LibrarySummaryRow[] {
+  type Accum = {
+    watchTimeMin: number;
+    videos: Set<number>;
+    cards: number;
+    words: number;
+    firstWatched: number;
+    lastWatched: number;
+    sessions: number;
+    lookups: number;
+  };
+
+  const byTitle = new Map<string, Accum>();
+
+  const ensure = (title: string): Accum => {
+    const existing = byTitle.get(title);
+    if (existing) return existing;
+    const created: Accum = {
+      watchTimeMin: 0,
+      videos: new Set<number>(),
+      cards: 0,
+      words: 0,
+      firstWatched: Number.POSITIVE_INFINITY,
+      lastWatched: Number.NEGATIVE_INFINITY,
+      sessions: 0,
+      lookups: 0,
+    };
+    byTitle.set(title, created);
+    return created;
+  };
+
+  for (const rollup of rollups) {
+    if (rollup.videoId === null) continue;
+    const title = resolveVideoAnimeTitle(rollup.videoId, titlesByVideoId);
+    const acc = ensure(title);
+    acc.watchTimeMin += rollup.totalActiveMin;
+    acc.cards += rollup.totalCards;
+    acc.words += rollup.totalTokensSeen;
+    acc.videos.add(rollup.videoId);
+    if (rollup.rollupDayOrMonth < acc.firstWatched) {
+      acc.firstWatched = rollup.rollupDayOrMonth;
+    }
+    if (rollup.rollupDayOrMonth > acc.lastWatched) {
+      acc.lastWatched = rollup.rollupDayOrMonth;
+    }
+  }
+
+  for (const session of sessions) {
+    const title = resolveTrendAnimeTitle(session);
+    if (!byTitle.has(title)) continue;
+    const acc = byTitle.get(title)!;
+    acc.sessions += 1;
+    acc.lookups += session.yomitanLookupCount;
+  }
+
+  const rows: LibrarySummaryRow[] = [];
+  for (const [title, acc] of byTitle) {
+    if (!Number.isFinite(acc.firstWatched) || !Number.isFinite(acc.lastWatched)) {
+      continue;
+    }
+    rows.push({
+      title,
+      watchTimeMin: Math.round(acc.watchTimeMin),
+      videos: acc.videos.size,
+      sessions: acc.sessions,
+      cards: acc.cards,
+      words: acc.words,
+      lookups: acc.lookups,
+      lookupsPerHundred:
+        acc.words > 0 ? +((acc.lookups / acc.words) * 100).toFixed(1) : null,
+      firstWatched: acc.firstWatched,
+      lastWatched: acc.lastWatched,
+    });
+  }
+
+  rows.sort((a, b) => b.watchTimeMin - a.watchTimeMin || a.title.localeCompare(b.title));
+  return rows;
+}
+
 function getVideoAnimeTitleMap(
   db: DatabaseSync,
   videoIds: Array<number | null>,
@@ -716,6 +799,6 @@ export function getTrendsDashboard(
       watchTimeByDayOfWeek: buildWatchTimeByDayOfWeek(sessions),
       watchTimeByHour: buildWatchTimeByHour(sessions),
     },
-    librarySummary: [],
+    librarySummary: buildLibrarySummary(dailyRollups, sessions, titlesByVideoId),
   };
 }