feat(17-03): add SpawnArchitectDropdown and ActionMenu components

- SpawnArchitectDropdown: discuss/breakdown modes via tRPC mutations
- Brief success state on button text after spawn
- ActionMenu: archive with browser confirm, disabled edit/duplicate/delete
- No deleteInitiative tRPC procedure exists, so delete is placeholder
- Both components invalidate listInitiatives on success

packages/web/src/components/ActionMenu.tsx

@@ -0,0 +1,64 @@
+import { MoreHorizontal } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { trpc } from "@/lib/trpc";
+
+interface ActionMenuProps {
+  initiativeId: string;
+  onDelete?: () => void;
+}
+
+export function ActionMenu({ initiativeId, onDelete }: ActionMenuProps) {
+  const utils = trpc.useUtils();
+
+  const archiveMutation = trpc.updateInitiative.useMutation({
+    onSuccess: () => {
+      utils.listInitiatives.invalidate();
+      onDelete?.();
+    },
+    onError: (err) => {
+      console.error("Failed to archive initiative:", err.message);
+    },
+  });
+
+  function handleArchive() {
+    const confirmed = window.confirm(
+      "Are you sure you want to archive this initiative? It can be restored later."
+    );
+    if (!confirmed) return;
+
+    archiveMutation.mutate({
+      id: initiativeId,
+      status: "archived",
+    });
+  }
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button variant="ghost" size="icon" className="h-8 w-8">
+          <MoreHorizontal className="h-4 w-4" />
+          <span className="sr-only">More actions</span>
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end">
+        <DropdownMenuItem disabled>Edit</DropdownMenuItem>
+        <DropdownMenuItem disabled>Duplicate</DropdownMenuItem>
+        <DropdownMenuSeparator />
+        <DropdownMenuItem
+          onClick={handleArchive}
+          disabled={archiveMutation.isPending}
+        >
+          {archiveMutation.isPending ? "Archiving..." : "Archive"}
+        </DropdownMenuItem>
+        <DropdownMenuItem disabled>Delete</DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}

packages/web/src/components/SpawnArchitectDropdown.tsx

@@ -0,0 +1,80 @@
+import { useState } from "react";
+import { ChevronDown } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { trpc } from "@/lib/trpc";
+
+interface SpawnArchitectDropdownProps {
+  initiativeId: string;
+  initiativeName: string;
+}
+
+export function SpawnArchitectDropdown({
+  initiativeId,
+  initiativeName,
+}: SpawnArchitectDropdownProps) {
+  const [open, setOpen] = useState(false);
+  const [successText, setSuccessText] = useState<string | null>(null);
+
+  const discussMutation = trpc.spawnArchitectDiscuss.useMutation({
+    onSuccess: () => {
+      setOpen(false);
+      setSuccessText("Spawned!");
+      setTimeout(() => setSuccessText(null), 2000);
+    },
+    onError: (err) => {
+      console.error("Failed to spawn discuss architect:", err.message);
+    },
+  });
+
+  const breakdownMutation = trpc.spawnArchitectBreakdown.useMutation({
+    onSuccess: () => {
+      setOpen(false);
+      setSuccessText("Spawned!");
+      setTimeout(() => setSuccessText(null), 2000);
+    },
+    onError: (err) => {
+      console.error("Failed to spawn breakdown architect:", err.message);
+    },
+  });
+
+  const isPending = discussMutation.isPending || breakdownMutation.isPending;
+
+  function handleDiscuss() {
+    discussMutation.mutate({
+      name: initiativeName + "-discuss",
+      initiativeId,
+    });
+  }
+
+  function handleBreakdown() {
+    breakdownMutation.mutate({
+      name: initiativeName + "-breakdown",
+      initiativeId,
+    });
+  }
+
+  return (
+    <DropdownMenu open={open} onOpenChange={setOpen}>
+      <DropdownMenuTrigger asChild>
+        <Button variant="outline" size="sm" disabled={isPending}>
+          {successText ?? "Spawn Architect"}
+          <ChevronDown className="ml-1 h-3 w-3" />
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="start">
+        <DropdownMenuItem onClick={handleDiscuss} disabled={isPending}>
+          Discuss
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={handleBreakdown} disabled={isPending}>
+          Breakdown
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}