feat: persist incremental live channel analysis

Persist live channel language metadata across background projection rebuilds and target Local AI identity analysis to newly detected streams unless a manual full analysis is requested.

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

server/services/syncService.js

@@ -8,6 +8,18 @@ const liveProjection = require('./liveProjectionService');
 // Sync tracking
 const activeSyncs = new Set(); // sourceId
 
+async function rebuildLiveProjection(newIds) {
+    const currentSettings = await settings.get();
+    const mode = currentSettings.languageDetectionMode;
+    if (newIds.size > 0 && (mode === 'laya' || mode === 'hybrid')) {
+        return liveProjection.startRebuild(undefined, {
+            mode,
+            scopeItemIds: [...newIds]
+        }).promise;
+    }
+    return liveProjection.queueRebuild();
+}
+
 class SyncService {
     constructor() {
         this.lastSyncTime = null; // Track when global sync last completed
@@ -183,8 +195,8 @@ class SyncService {
         // 2. Live Streams
         console.log(`[Sync] Fetching Live Streams for ${source.name}`);
         const liveStreams = await api.getLiveStreams();
-        await this.saveStreams(source.id, 'live', liveStreams);
-        await liveProjection.queueRebuild();
+        const { newIds } = await this.saveStreams(source.id, 'live', liveStreams);
+        await rebuildLiveProjection(newIds);
 
         // 3. VOD Categories
         console.log(`[Sync] Fetching VOD Categories for ${source.name}`);
@@ -259,15 +271,17 @@ class SyncService {
      * @param {string} type - Type of items (live, movie, series)
      * @param {Array} items - Items to save
      * @param {Object} options - Options { skipPurge: boolean }
-     * @returns {Set} Set of synced IDs (for external purge if skipPurge was true)
+     * @returns {{ syncedIds: Set<string>, newIds: Set<string> }} Synced and newly inserted IDs
      */
     async saveStreams(sourceId, type, items, options = {}) {
-        if (!items || items.length === 0) return new Set();
+        if (!items || items.length === 0) return { syncedIds: new Set(), newIds: new Set() };
         const db = getDb();
         const { skipPurge = false } = options;
 
         // Collect all IDs we're syncing
         const syncedIds = new Set();
+        const newIds = new Set();
+        const existingItem = db.prepare('SELECT 1 FROM playlist_items WHERE id = ?');
 
         const stmt = db.prepare(`
             INSERT INTO playlist_items (
@@ -316,6 +330,7 @@ class SyncService {
 
                 const id = `${sourceId}:${itemId}`;
                 syncedIds.add(id);
+                if (!existingItem.get(id)) newIds.add(id);
 
                 stmt.run(
                     id,
@@ -349,7 +364,7 @@ class SyncService {
         }
 
         console.log(`[Sync] Saved ${items.length} ${type} items`);
-        return syncedIds;
+        return { syncedIds, newIds };
     }
 
     /**
@@ -511,6 +526,7 @@ class SyncService {
 
         const allGroups = new Set();
         const allSyncedIds = new Set(); // Collect IDs across all batches
+        const allNewIds = new Set();
         let totalChannels = 0;
         let batchCount = 0;
 
@@ -530,8 +546,9 @@ class SyncService {
 
             // Save this batch immediately (skip purge - we'll do it at the end)
             if (playlistItems.length > 0) {
-                const batchIds = await this.saveStreams(source.id, 'live', playlistItems, { skipPurge: true });
-                batchIds.forEach(id => allSyncedIds.add(id));
+                const { syncedIds, newIds } = await this.saveStreams(source.id, 'live', playlistItems, { skipPurge: true });
+                syncedIds.forEach(id => allSyncedIds.add(id));
+                newIds.forEach(id => allNewIds.add(id));
                 totalChannels += playlistItems.length;
             }
 
@@ -561,7 +578,7 @@ class SyncService {
         }));
 
         await this.saveCategories(source.id, 'live', categories);
-        await liveProjection.queueRebuild();
+        await rebuildLiveProjection(allNewIds);
         console.log(`[Sync] M3U sync complete for ${source.name}`);
     }