feat: IPC additions for reminders/events/routines, ack tracking, tool management

- Extend IPC wire protocol: add ListReminders, ListEvents, ListProposedRoutines,
  DismissProposedRoutine, AcceptProposedRoutine IPC methods with request/response
  types. Update wire.go with new message kinds.
- Add ack_sends table (migration #5): tracks sev4 telegram repeat-til-ack
  delivery state with rule name + timestamp, indexed for dedup.
- Add Store.DeleteTool: permanently removes a tool row (for dismissing proposed
  tools), idempotent on missing tool.
- Update tick.go: wire new IPC handlers into daemon tick.

internal/ipc/client.go

@@ -369,6 +369,30 @@ func (c *Client) ListTools(ctx context.Context, status string) ([]Tool, error) {
 	return r.Tools, nil
 }
 
+func (c *Client) DeleteTool(ctx context.Context, name string) error {
+	return c.call(ctx, MethodDeleteTool, disableToolReq{Name: name}, nil)
+}
+
+func (c *Client) ListProposedRoutines(ctx context.Context) ([]ProposedRoutine, error) {
+	var r listProposedRoutinesResp
+	if err := c.call(ctx, MethodListProposedRoutines, nil, &r); err != nil {
+		return nil, err
+	}
+	return r.Routines, nil
+}
+
+func (c *Client) DismissProposedRoutine(ctx context.Context, id int64) error {
+	return c.call(ctx, MethodDismissProposedRoutine, dismissProposedRoutineReq{ID: id}, nil)
+}
+
+func (c *Client) Chat(ctx context.Context, text string) (string, error) {
+	var r chatResp
+	if err := c.call(ctx, MethodChat, chatReq{Text: text}, &r); err != nil {
+		return "", err
+	}
+	return r.Reply, nil
+}
+
 func (c *Client) TickTrace(ctx context.Context) (TickTrace, error) {
 	var t TickTrace
 	if err := c.call(ctx, MethodTickTrace, nil, &t); err != nil {