feat: add 5 PM features — custom statuses, Gantt, quick-add, automations, notifications

- Custom workflow statuses: per-project configurable status definitions
  replacing the fixed task_status enum. Each project defines its own
  workflow with drag-to-reorder, color coding, and category mapping.
- Gantt/timeline view: full project roadmap with task bars, dependency
  arrows, milestone diamonds, zoom levels (day/week/month), and drag
  to reschedule.
- Natural-language quick-add: NLP parser extracts dates, priorities,
  projects, labels, and recurrence from free text. Floating bar with
  'n' shortcut and live parsed preview.
- Automation rules: no-code trigger-action system per project. Triggers
  on status change, task creation, due date approaching. Actions set
  status/priority, add labels, create notifications.
- Notification center: in-app bell icon with unread badge, slide-out
  panel, real-time SSE updates, mark read/all read. Replaces raw
  activity feed dropdown.

Schema: adds status_definitions, automation_rules, notifications tables.
Migrations: 0007, 0008, 0009. 41 NLP parser tests pass.

apps/web/src/hooks/use-realtime.ts

@@ -72,6 +72,10 @@ export function useRealtime(options: UseRealtimeOptions = {}) {
         case "graph_edge":
           queryKeys.push(["graph"]);
           break;
+        case "notification":
+          // A new in-app notification landed — refresh the bell badge and list.
+          queryKeys.push(["notifications"], ["notifications-count"]);
+          break;
         default:
           queryKeys.push([entityType]);
       }