fix: backward compatibility for focus_areas migration

- get_focus_areas now tries user_focus_preferences first (Migration 031)
- Falls back to old focus_areas table if Migration 031 not applied
- get_goals_grouped wraps focus_contributions loading in try/catch
- Graceful degradation until migrations run

backend/routers/goals.py

@@ -201,7 +201,21 @@ def get_focus_areas(session: dict = Depends(require_auth)):
     with get_db() as conn:
         cur = get_cursor(conn)
 
-        # Try to get custom focus areas
+        # Try to get custom focus areas (user_focus_preferences after Migration 031)
+        try:
+            cur.execute("""
+                SELECT weight_loss_pct, muscle_gain_pct, strength_pct,
+                       endurance_pct, flexibility_pct, health_pct,
+                       created_at, updated_at
+                FROM user_focus_preferences
+                WHERE profile_id = %s
+                LIMIT 1
+            """, (pid,))
+            row = cur.fetchone()
+        except Exception as e:
+            # Migration 031 not applied yet, try old table name
+            print(f"[WARNING] user_focus_preferences not found, trying old focus_areas: {e}")
+            try:
                 cur.execute("""
                     SELECT weight_loss_pct, muscle_gain_pct, strength_pct,
                            endurance_pct, flexibility_pct, health_pct,
@@ -210,8 +224,9 @@ def get_focus_areas(session: dict = Depends(require_auth)):
                     WHERE profile_id = %s AND active = true
                     LIMIT 1
                 """, (pid,))
-
                 row = cur.fetchone()
+            except:
+                row = None
 
         if row:
             return {