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/server.go

@@ -199,6 +199,10 @@ func (a *storeAPI) RevertFact(ctx context.Context, key string) (int64, error) {
 	return newID, mapErr(err)
 }
 
+func (a *storeAPI) Chat(ctx context.Context, text string) (string, error) {
+	return "", errors.New("store: chat not available via direct store API")
+}
+
 func (a *storeAPI) TickTrace(ctx context.Context) (TickTrace, error) {
 	return TickTrace{}, errors.New("store: tick trace not available via direct store API")
 }
@@ -215,6 +219,36 @@ func (a *storeAPI) ListTools(ctx context.Context, status string) ([]Tool, error)
 	return out, nil
 }
 
+func (a *storeAPI) DeleteTool(ctx context.Context, name string) error {
+	return mapErr(a.s.DeleteTool(ctx, name))
+}
+
+func (a *storeAPI) ListProposedRoutines(ctx context.Context) ([]ProposedRoutine, error) {
+	rs, err := a.s.ListProposedRoutines(ctx)
+	if err != nil {
+		return nil, mapErr(err)
+	}
+	out := make([]ProposedRoutine, len(rs))
+	for i, r := range rs {
+		out[i] = ProposedRoutine{
+			ID:           r.ID,
+			Action:       r.Action,
+			Object:       r.Object,
+			IntervalDays: r.IntervalDays,
+			Status:       r.Status,
+			CreatedTs:    r.CreatedTs.UnixMilli(),
+		}
+		if r.ReminderID != nil {
+			out[i].ReminderID = r.ReminderID
+		}
+	}
+	return out, nil
+}
+
+func (a *storeAPI) DismissProposedRoutine(ctx context.Context, id int64) error {
+	return mapErr(a.s.DismissProposedRoutine(ctx, id))
+}
+
 func toTool(t store.Tool) Tool {
 	return Tool{
 		Name: t.Name, Scope: t.Scope, Cmd: t.Cmd, Destructive: t.Destructive,
@@ -712,6 +746,30 @@ func (s *Server) dispatch(ctx context.Context, req Request) (json.RawMessage, er
 		}
 		return marshalResult(listToolsResp{Tools: out}), nil
 
+	case MethodDeleteTool:
+		var p disableToolReq
+		if err := unmarshalParams(req.Params, &p); err != nil {
+			return nil, err
+		}
+		return marshalResult(nil), api.DeleteTool(ctx, p.Name)
+
+	case MethodListProposedRoutines:
+		out, err := api.ListProposedRoutines(ctx)
+		if err != nil {
+			return nil, err
+		}
+		if out == nil {
+			out = []ProposedRoutine{}
+		}
+		return marshalResult(listProposedRoutinesResp{Routines: out}), nil
+
+	case MethodDismissProposedRoutine:
+		var p dismissProposedRoutineReq
+		if err := unmarshalParams(req.Params, &p); err != nil {
+			return nil, err
+		}
+		return marshalResult(nil), api.DismissProposedRoutine(ctx, p.ID)
+
 	case MethodRevertFact:
 		var p struct {
 			Key string `json:"key"`
@@ -725,6 +783,17 @@ func (s *Server) dispatch(ctx context.Context, req Request) (json.RawMessage, er
 		}
 		return marshalResult(map[string]int64{"new_id": newID}), nil
 
+	case MethodChat:
+		var p chatReq
+		if err := unmarshalParams(req.Params, &p); err != nil {
+			return nil, err
+		}
+		reply, err := api.Chat(ctx, p.Text)
+		if err != nil {
+			return nil, err
+		}
+		return marshalResult(chatResp{Reply: reply}), nil
+
 	case MethodTickTrace:
 		t, err := api.TickTrace(ctx)
 		if err != nil {