feat: Buddy System & Bulk Scanner

- Add Buddy linking via QR code/handshake (buddy_invites table)
- Add Bulk Scanner for rapid-fire bottle scanning in sessions
- Add processing_status to bottles for background AI analysis
- Fix offline OCR with proper tessdata caching in Service Worker
- Fix Supabase GoTrueClient singleton warning
- Add collection refresh after offline sync completes

New components:
- BuddyHandshake.tsx - QR code display and code entry
- BulkScanSheet.tsx - Camera UI with capture queue
- BottleSkeletonCard.tsx - Pending bottle display
- useBulkScanner.ts - Queue management hook
- buddy-link.ts - Server actions for buddy linking
- bulk-scan.ts - Server actions for batch processing

public/sw.js

@@ -1,4 +1,4 @@
-const CACHE_NAME = 'whisky-vault-v14-offline';
+const CACHE_NAME = 'whisky-vault-v19-offline';
 
 // CONFIG: Assets
 const STATIC_ASSETS = [
@@ -7,6 +7,16 @@ const STATIC_ASSETS = [
     '/icon-512.png',
     '/favicon.ico',
     '/lib/browser-image-compression.js',
+    // Tesseract OCR files for offline scanning (ALL variants for browser compatibility)
+    '/tessdata/worker.min.js',
+    '/tessdata/tesseract-core.wasm.js',
+    '/tessdata/tesseract-core-simd.wasm.js',
+    '/tessdata/tesseract-core-lstm.wasm.js',
+    '/tessdata/tesseract-core-simd-lstm.wasm.js',
+    '/tessdata/tesseract-core-relaxedsimd.wasm.js',
+    '/tessdata/tesseract-core-relaxedsimd-lstm.wasm.js',
+    '/tessdata/eng.traineddata',
+    '/tessdata/eng.traineddata.gz',
 ];
 
 const CORE_PAGES = [
@@ -55,7 +65,7 @@ self.addEventListener('install', (event) => {
 
     event.waitUntil(
         caches.open(CACHE_NAME).then(async (cache) => {
-            console.log('🏗️ PWA: Building Offline-Modus v13...');
+            console.log(`🏗️ PWA: Building Offline-Modus ${CACHE_NAME}...`);
 
             const items = [...STATIC_ASSETS, ...CORE_PAGES];
             const total = items.length;
@@ -153,6 +163,31 @@ self.addEventListener('fetch', (event) => {
         return;
     }
 
+    // 📦 Tesseract OCR files and static libs - CACHE FIRST (critical for offline)
+    if (url.pathname.startsWith('/tessdata/') || url.pathname.startsWith('/lib/')) {
+        event.respondWith(
+            caches.match(event.request).then(async (cachedResponse) => {
+                if (cachedResponse) {
+                    console.log(`[SW] Serving from cache: ${url.pathname}`);
+                    return cachedResponse;
+                }
+                // Try network, cache the result
+                try {
+                    const networkResponse = await fetchWithTimeout(event.request, 30000);
+                    if (networkResponse && networkResponse.ok) {
+                        const cache = await caches.open(CACHE_NAME);
+                        cache.put(event.request, networkResponse.clone());
+                    }
+                    return networkResponse;
+                } catch (error) {
+                    console.error(`[SW] Failed to fetch ${url.pathname}:`, error);
+                    return new Response('File not available offline', { status: 503 });
+                }
+            })
+        );
+        return;
+    }
+
     // Navigation & Assets
     const isNavigation = event.request.mode === 'navigate';
     const isAsset = event.request.destination === 'style' ||