Wire plan_ready, list_ready, new_suggestions and Send to Google Chat

Connect the features to the notification outbox so real events notify,
each stored by the new notify.EmitTx in the transaction of the change it
is about (Wake after commit):

- plan_ready:{weekStart} (/plan) when a draft job stores the AI's draft;
  a redraft shares the key and a manual swap never emits. The title reads
  "Next week's plan is ready" for the coming week.
- list_ready:{weekStart} (/plan/shopping) when a week's Supply run is
  first created, by generate or after Push to Calendar.
- new_suggestions:{batchId} (/discover) when a scheduled or manual batch
  ends done with cards; replenish batches never notify.
- plan.Service.EmitDayOfReminder(date) emits day_of_reminder:{date} for
  the Feature 20 scheduler.

Add POST /api/v1/shopping/{weekStart}/send-chat: shopping.SendToChat posts
the dinners with needed items and a link through chat.PostSupplyRun,
records sent_to_chat_at, and is idempotent per week unless
{"resend": true}. The Supply run's Send to Google Chat button calls it
("Send again" once sent) and shows failures in an ErrorBanner; the unused
Unavailable placeholder is removed.

Task: f0cd9d50-9c11-41be-a945-7bae9f5f28a4

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/suggest/batch.go

@@ -10,9 +10,12 @@ import (
 
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/ai/harness"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/ai/skills"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/chat"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/db"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/dinners"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/household"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/jobs"
+	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/notify"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/recipes"
 	"code.cubecraftlabs.com/Maniacs_Mansion/Meal-Quest/internal/store"
 )
@@ -54,7 +57,18 @@ func (r batchResult) PublicJSON() ([]byte, error) { return json.Marshal(r) }
 // recording the batch's end fails, so does the job; when it times out at
 // shutdown, the job is left running and the batch with it, for the next
 // start to fail.
+//
+// A scheduled or manual batch that ends done having added Side quests to
+// the deck emits new_suggestions, keyed by the batch, in the transaction
+// that records it done. A replenish batch, which tops up the deck as the
+// household swipes, never notifies. A notification that cannot be stored
+// fails the done write with it, as any failure recording the batch's end
+// does: the job fails, and its Side quests stay in the deck.
 func (s *Service) runBatch(ctx context.Context, p BatchJob, publish func(batchResult) error) (batchResult, error) {
+	batch, err := db.New(s.st.Reader).GetSuggestionBatch(ctx, p.BatchID)
+	if err != nil {
+		return batchResult{}, fmt.Errorf("suggest: read batch %s: %w", p.BatchID, err)
+	}
 	n, err := db.New(s.st.Writer).StartSuggestionBatch(ctx, db.StartSuggestionBatchParams{
 		UpdatedAt: store.Now().String(),
 		ID:        p.BatchID,
@@ -65,14 +79,19 @@ func (s *Service) runBatch(ctx context.Context, p BatchJob, publish func(batchRe
 	if n == 0 {
 		return batchResult{}, fmt.Errorf("suggest: batch %s is not pending", p.BatchID)
 	}
-	res, err := s.fill(ctx, p.BatchID, publish)
+	f, err := s.fill(ctx, p.BatchID, publish)
 	if err == nil {
-		if err := s.finishBatch(ctx, p.BatchID, BatchDone); err != nil {
+		var ev *notify.Event
+		if batch.Trigger != TriggerReplenish && len(f.names) > 0 {
+			e := chat.NewSuggestions(p.BatchID, household.WeekStart(f.today), f.names)
+			ev = &e
+		}
+		if err := s.finishBatch(ctx, p.BatchID, BatchDone, ev); err != nil {
 			return batchResult{}, err
 		}
-		return res, nil
+		return f.res, nil
 	}
-	finishErr := s.finishBatch(ctx, p.BatchID, BatchFailed)
+	finishErr := s.finishBatch(ctx, p.BatchID, BatchFailed, nil)
 	if ctx.Err() != nil {
 		return batchResult{}, errors.Join(ctx.Err(), finishErr)
 	}
@@ -85,50 +104,60 @@ func (s *Service) runBatch(ctx context.Context, p BatchJob, publish func(batchRe
 	return batchResult{}, errors.Join(err, finishErr)
 }
 
+// filled is what fill did: the batch's result, the names of the Side
+// quests it added to the deck, and the household's date it ran on.
+type filled struct {
+	res   batchResult
+	names []string
+	today store.LocalDate
+}
+
 // fill does runBatch's work, returning a *jobs.Failure for a failure the
 // household may see.
-func (s *Service) fill(ctx context.Context, batchID string, publish func(batchResult) error) (batchResult, error) {
+func (s *Service) fill(ctx context.Context, batchID string, publish func(batchResult) error) (filled, error) {
 	res := batchResult{BatchID: batchID, Stage: StageSuggesting, SuggestionIDs: []string{}}
 	if err := publish(res); err != nil {
-		return batchResult{}, err
+		return filled{}, err
 	}
 	in, err := s.request(ctx)
 	if err != nil {
-		return batchResult{}, err
+		return filled{}, err
 	}
 	out, err := s.suggest(ctx, batchID, in)
 	if err != nil {
 		if ctx.Err() != nil {
-			return batchResult{}, ctx.Err()
+			return filled{}, ctx.Err()
 		}
-		return batchResult{}, &jobs.Failure{Code: ReasonAIFailed}
+		return filled{}, &jobs.Failure{Code: ReasonAIFailed}
 	}
 	res.Stage = StageGrounding
 	res.Dropped = len(out.Dropped)
 	if err := publish(res); err != nil {
-		return batchResult{}, err
+		return filled{}, err
 	}
+	var names []string
 	left := out.Suggestions
 	for len(res.SuggestionIDs) < BatchSize && len(left) > 0 {
 		round := left[:min(BatchSize-len(res.SuggestionIDs), len(left))]
 		left = left[len(round):]
 		grounded, err := s.ground(ctx, round)
 		if err != nil {
-			return batchResult{}, err
+			return filled{}, err
 		}
 		res.Dropped += len(round) - len(grounded)
-		ids, err := s.store(ctx, batchID, grounded)
+		ids, stored, err := s.store(ctx, batchID, grounded)
 		if err != nil {
-			return batchResult{}, err
+			return filled{}, err
 		}
 		res.Dropped += len(grounded) - len(ids)
 		res.SuggestionIDs = append(res.SuggestionIDs, ids...)
+		names = append(names, stored...)
 		if err := publish(res); err != nil {
-			return batchResult{}, err
+			return filled{}, err
 		}
 	}
 	res.Stage = StageDone
-	return res, nil
+	return filled{res: res, names: names, today: in.Context.Today}, nil
 }
 
 // request reads what suggest_side_quests is given: the household context,
@@ -203,9 +232,11 @@ func (s *Service) ground(ctx context.Context, quests []skills.SideQuest) ([]grou
 // suggest_side_quests ran, a dinner it repeats was added, a suggestion it
 // repeats passed or a Rotation check dropped, or a Regular it cites renamed
 // or archived. Passed names are read in the same transaction as the store,
-// so a Pass or drop committed before it is never missed.
-func (s *Service) store(ctx context.Context, batchID string, quests []groundedQuest) ([]string, error) {
+// so a Pass or drop committed before it is never missed. The names stored
+// are returned with the ids.
+func (s *Service) store(ctx context.Context, batchID string, quests []groundedQuest) ([]string, []string, error) {
 	ids := []string{}
+	var stored []string
 	err := s.st.WithTx(ctx, func(tx *sql.Tx) error {
 		q := db.New(tx)
 		existing, err := q.ListUnarchivedDinners(ctx)
@@ -269,13 +300,14 @@ func (s *Service) store(ctx context.Context, batchID string, quests []groundedQu
 			}
 			names = append(names, d.Name)
 			ids = append(ids, id)
+			stored = append(stored, d.Name)
 		}
 		return nil
 	})
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
-	return ids, nil
+	return ids, stored, nil
 }
 
 // citedIDs returns the ids of the Regulars named cited, false when one