fix: Graceful fallback if Migration 031 not yet applied

- Wrap focus_contributions loading in try/catch
- If tables don't exist (migration not run), continue without them
- Backward compatible with pre-migration state
- Logs warning but doesn't crash

backend/routers/goals.py

@@ -720,6 +720,7 @@ def get_goals_grouped(session: dict = Depends(require_auth)):
         focus_map = {}  # goal_id → [contributions]
 
         if goal_ids:
+            try:
                 placeholders = ','.join(['%s'] * len(goal_ids))
                 cur.execute(f"""
                     SELECT
@@ -743,6 +744,10 @@ def get_goals_grouped(session: dict = Depends(require_auth)):
                         'category': row['category'],
                         'contribution_weight': float(row['contribution_weight'])
                     })
+            except Exception as e:
+                # Migration 031 not yet applied - focus_contributions tables don't exist
+                print(f"[WARNING] Could not load focus_contributions: {e}")
+                # Continue without focus_contributions (backward compatible)
 
         # Group by category and attach focus_contributions
         grouped = {}