migrate: replace Firebase with PostgreSQL across core routes

- chat-context.ts: session history now from fs_sessions
- /api/sessions: reads from fs_sessions (NextAuth session auth)
- /api/github/connect: NextAuth session + stores in fs_users.data
- /api/user/api-key: NextAuth session + stores in fs_users.data
- /api/projects/[id]/vision: PATCH to fs_projects JSONB
- /api/projects/[id]/knowledge/items: reads from fs_knowledge_items
- /api/projects/[id]/knowledge/import-ai-chat: uses pg createKnowledgeItem
- lib/server/knowledge.ts: fully rewritten to use PostgreSQL
- entrypoint.sh: add fs_knowledge_items and chat_conversations tables

Made-with: Cursor

app/api/user/api-key/route.ts

@@ -1,76 +1,41 @@
 import { NextResponse } from 'next/server';
-import { adminAuth, adminDb } from '@/lib/firebase/admin';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/lib/auth/authOptions';
+import { query } from '@/lib/db-postgres';
 import { v4 as uuidv4 } from 'uuid';
-import { FieldValue } from 'firebase-admin/firestore';
 
 export async function GET(request: Request) {
   try {
-    console.log('[API] Getting API key...');
-    
-    // Get the authorization header
-    const authHeader = request.headers.get('authorization');
-    if (!authHeader?.startsWith('Bearer ')) {
-      console.error('[API] No authorization header');
-      return NextResponse.json(
-        { error: 'No authorization token provided' },
-        { status: 401 }
-      );
+    const session = await getServerSession(authOptions);
+    if (!session?.user?.email) {
+      return NextResponse.json({ error: 'No authorization token provided' }, { status: 401 });
     }
 
-    const token = authHeader.substring(7);
-    console.log('[API] Token received, verifying...');
-    
-    // Verify the Firebase ID token
-    const decodedToken = await adminAuth.verifyIdToken(token);
-    const userId = decodedToken.uid;
-    console.log('[API] Token verified, userId:', userId);
+    const rows = await query<{ data: any }>(
+      `SELECT data FROM fs_users WHERE data->>'email' = $1 LIMIT 1`,
+      [session.user.email]
+    );
 
-    // Check if user already has an API key
-    console.log('[API] Checking for existing API key...');
-    const userDoc = await adminDb.collection('users').doc(userId).get();
-    
-    if (userDoc.exists && userDoc.data()?.apiKey) {
-      console.log('[API] Found existing API key');
-      return NextResponse.json({
-        apiKey: userDoc.data()!.apiKey,
-      });
+    if (rows.length > 0 && rows[0].data?.apiKey) {
+      return NextResponse.json({ apiKey: rows[0].data.apiKey });
     }
 
-    // Generate new API key
-    console.log('[API] Generating new API key...');
+    // Generate new API key and store it
     const apiKey = `vibn_${uuidv4().replace(/-/g, '')}`;
-    
-    // Store API key document
-    console.log('[API] Storing API key in Firestore...');
-    await adminDb.collection('apiKeys').doc(apiKey).set({
-      key: apiKey,
-      userId,
-      createdAt: FieldValue.serverTimestamp(),
-      isActive: true,
-    });
-    
-    // Update user document with API key reference (or create if doesn't exist)
-    console.log('[API] Updating user document...');
-    await adminDb.collection('users').doc(userId).set({
-      apiKey,
-      updatedAt: FieldValue.serverTimestamp(),
-    }, { merge: true });
 
-    console.log('[API] API key created successfully:', apiKey);
-    return NextResponse.json({
-      apiKey,
-      isNew: true,
-    });
+    await query(
+      `UPDATE fs_users
+       SET data = data || $1::jsonb, updated_at = NOW()
+       WHERE data->>'email' = $2`,
+      [JSON.stringify({ apiKey, apiKeyCreatedAt: new Date().toISOString() }), session.user.email]
+    );
+
+    return NextResponse.json({ apiKey, isNew: true });
   } catch (error) {
     console.error('[API] Error getting/creating API key:', error);
-    console.error('[API] Error stack:', error instanceof Error ? error.stack : 'No stack trace');
     return NextResponse.json(
-      {
-        error: 'Failed to get API key',
-        details: error instanceof Error ? error.message : String(error),
-      },
+      { error: 'Failed to get API key', details: error instanceof Error ? error.message : String(error) },
       { status: 500 }
     );
   }
 }
-