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

@@ -720,29 +720,34 @@ def get_goals_grouped(session: dict = Depends(require_auth)):
         focus_map = {}  # goal_id → [contributions]
 
         if goal_ids:
-            placeholders = ','.join(['%s'] * len(goal_ids))
-            cur.execute(f"""
-                SELECT
-                    gfc.goal_id, gfc.contribution_weight,
-                    fa.id as focus_area_id, fa.key, fa.name_de, fa.icon, fa.category
-                FROM goal_focus_contributions gfc
-                JOIN focus_area_definitions fa ON gfc.focus_area_id = fa.id
-                WHERE gfc.goal_id IN ({placeholders})
-                ORDER BY gfc.contribution_weight DESC
-            """, tuple(goal_ids))
+            try:
+                placeholders = ','.join(['%s'] * len(goal_ids))
+                cur.execute(f"""
+                    SELECT
+                        gfc.goal_id, gfc.contribution_weight,
+                        fa.id as focus_area_id, fa.key, fa.name_de, fa.icon, fa.category
+                    FROM goal_focus_contributions gfc
+                    JOIN focus_area_definitions fa ON gfc.focus_area_id = fa.id
+                    WHERE gfc.goal_id IN ({placeholders})
+                    ORDER BY gfc.contribution_weight DESC
+                """, tuple(goal_ids))
 
-            for row in cur.fetchall():
-                gid = row['goal_id']
-                if gid not in focus_map:
-                    focus_map[gid] = []
-                focus_map[gid].append({
-                    'focus_area_id': row['focus_area_id'],
-                    'key': row['key'],
-                    'name_de': row['name_de'],
-                    'icon': row['icon'],
-                    'category': row['category'],
-                    'contribution_weight': float(row['contribution_weight'])
-                })
+                for row in cur.fetchall():
+                    gid = row['goal_id']
+                    if gid not in focus_map:
+                        focus_map[gid] = []
+                    focus_map[gid].append({
+                        'focus_area_id': row['focus_area_id'],
+                        'key': row['key'],
+                        'name_de': row['name_de'],
+                        'icon': row['icon'],
+                        '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 = {}