feat(plan): frontend startPlanning API + store action + task_kind type

frontend/src/types/note.ts

@@ -22,6 +22,7 @@ export interface Note {
   recurrence_next_spawn_at: string | null;
   is_task: boolean;
   note_type: NoteType;
+  task_kind?: "work" | "plan";
   metadata: Record<string, string>;
   created_at: string;
   updated_at: string;

frontend/src/types/task.ts

@@ -5,6 +5,21 @@ export interface TaskListResponse {
   total: number;
 }
 
+export interface StartPlanningResult {
+  task: import("./note").Note;
+  applicable_rules: {
+    id: number;
+    title: string;
+    statement: string;
+    topic_title: string;
+    rulebook_title: string;
+  }[];
+  subscribed_rulebooks: { id: number; title: string }[];
+  applicable_rules_truncated: boolean;
+  project_goal: string;
+  open_task_count: number;
+}
+
 export interface TaskLog {
   id: number;
   task_id: number;