feat(21-01): wire toast notifications into all mutation flows

- SpawnArchitectDropdown: toast.success on spawn, toast.error on failure
- ActionMenu: toast.success on archive, toast.error on failure
- CreateInitiativeDialog: toast.success on creation
- Inbox: toast.success/error for resumeAgent and respondToMessage mutations
- Replace all console.error-only mutation error handling with user-visible toasts

packages/web/src/components/ActionMenu.tsx

@@ -7,6 +7,7 @@ import {
   DropdownMenuSeparator,
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
+import { toast } from "sonner";
 import { trpc } from "@/lib/trpc";
 
 interface ActionMenuProps {
@@ -21,9 +22,10 @@ export function ActionMenu({ initiativeId, onDelete }: ActionMenuProps) {
     onSuccess: () => {
       utils.listInitiatives.invalidate();
       onDelete?.();
+      toast.success("Initiative archived");
     },
-    onError: (err) => {
-      console.error("Failed to archive initiative:", err.message);
+    onError: () => {
+      toast.error("Failed to archive initiative");
     },
   });
 

packages/web/src/components/CreateInitiativeDialog.tsx

@@ -11,6 +11,7 @@ import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { Textarea } from "@/components/ui/textarea";
+import { toast } from "sonner";
 import { trpc } from "@/lib/trpc";
 
 interface CreateInitiativeDialogProps {
@@ -32,6 +33,7 @@ export function CreateInitiativeDialog({
     onSuccess: () => {
       utils.listInitiatives.invalidate();
       onOpenChange(false);
+      toast.success("Initiative created");
     },
     onError: (err) => {
       setError(err.message);

packages/web/src/components/SpawnArchitectDropdown.tsx

@@ -7,6 +7,7 @@ import {
   DropdownMenuItem,
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
+import { toast } from "sonner";
 import { trpc } from "@/lib/trpc";
 
 interface SpawnArchitectDropdownProps {
@@ -26,9 +27,10 @@ export function SpawnArchitectDropdown({
       setOpen(false);
       setSuccessText("Spawned!");
       setTimeout(() => setSuccessText(null), 2000);
+      toast.success("Architect spawned");
     },
-    onError: (err) => {
-      console.error("Failed to spawn discuss architect:", err.message);
+    onError: () => {
+      toast.error("Failed to spawn architect");
     },
   });
 
@@ -37,9 +39,10 @@ export function SpawnArchitectDropdown({
       setOpen(false);
       setSuccessText("Spawned!");
       setTimeout(() => setSuccessText(null), 2000);
+      toast.success("Architect spawned");
     },
-    onError: (err) => {
-      console.error("Failed to spawn breakdown architect:", err.message);
+    onError: () => {
+      toast.error("Failed to spawn architect");
     },
   });
 

packages/web/src/routes/inbox.tsx

@@ -4,6 +4,7 @@ import { AlertCircle, ChevronLeft } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { Card } from "@/components/ui/card";
 import { Skeleton } from "@/components/Skeleton";
+import { toast } from "sonner";
 import { trpc } from "@/lib/trpc";
 import { InboxList } from "@/components/InboxList";
 import { QuestionForm } from "@/components/QuestionForm";
@@ -39,6 +40,10 @@ function InboxPage() {
       void utils.listWaitingAgents.invalidate();
       void utils.listMessages.invalidate();
       setSelectedAgentId(null);
+      toast.success("Answer submitted");
+    },
+    onError: () => {
+      toast.error("Failed to submit answer");
     },
   });
 
@@ -47,6 +52,10 @@ function InboxPage() {
       void utils.listWaitingAgents.invalidate();
       void utils.listMessages.invalidate();
       setSelectedAgentId(null);
+      toast.success("Response sent");
+    },
+    onError: () => {
+      toast.error("Failed to send response");
     },
   });