feat: add Disney/Non-Disney quick filter to dropdown panel

Backend:
- disney_filter query param on /api/assets (values: 'disney' | 'non_disney')
- Detects Disney by checking disney_park IS NOT NULL OR customer name LIKE 'D-%'
- Catches ESPN, Wide World of Sports, all Disney resorts, etc.
- Adds LEFT JOIN to customers table when disney_filter is active

Frontend:
- '🏰 Disney only' and '🏢 Non-Disney' options in Disney Park dropdown
- Active filter tag shows which is selected
- Works together with other dropdown filters

server.py

@@ -988,6 +988,7 @@ def list_assets(
     location_id: Optional[int] = Query(None),
     assigned_to: Optional[int] = Query(None),
     disney_park: Optional[str] = Query(None),
+    disney_filter: Optional[str] = Query(None),
     q: Optional[str] = Query(None),
     limit: int = Query(100, ge=1, le=2000),
     offset: int = Query(0, ge=0),
@@ -1008,6 +1009,10 @@ def list_assets(
     if disney_park:
         conditions.append("disney_park = ?")
         params.append(disney_park)
+    if disney_filter == "disney":
+        conditions.append("(disney_park IS NOT NULL OR c.name LIKE 'D-%')")
+    elif disney_filter == "non_disney":
+        conditions.append("(disney_park IS NULL AND (c.name IS NULL OR c.name NOT LIKE 'D-%'))")
     if model:
         conditions.append("model = ?")
         params.append(model)
@@ -1026,7 +1031,10 @@ def list_assets(
         params.extend([like, like, like, like])
 
     where = " AND ".join(conditions)
-    sql = "SELECT * FROM assets"
+    join_clause = ""
+    if disney_filter:
+        join_clause = " LEFT JOIN customers c ON assets.customer_id = c.id"
+    sql = f"SELECT assets.* FROM assets{join_clause}"
     if where:
         sql += f" WHERE {where}"
     sql += " ORDER BY created_at DESC LIMIT ? OFFSET ?"
@@ -1034,7 +1042,7 @@ def list_assets(
 
     rows = conn.execute(sql, params).fetchall()
     # Get total count for pagination
-    count_sql = "SELECT COUNT(*) FROM assets"
+    count_sql = f"SELECT COUNT(*) FROM assets{join_clause}"
     if where:
         count_sql += f" WHERE {where}"
     total = conn.execute(count_sql, params[:len(params)-2]).fetchone()[0]