feat(17-04): wire initiative dashboard with filter, list, and create dialog

Replace placeholder DashboardPage with fully functional initiative dashboard:
- Page header with title, status filter dropdown, and New Initiative button
- InitiativeList with statusFilter prop for backend-driven filtering
- CreateInitiativeDialog controlled by local state
- Navigation to /initiatives/$id via TanStack Router useNavigate
- All card callbacks wired (view, spawn architect, delete placeholder)

packages/web/src/routes/initiatives/index.tsx

@@ -1,19 +1,76 @@
-import { createFileRoute } from '@tanstack/react-router'
-import { trpc } from '../../lib/trpc'
+import { useState } from "react";
+import { createFileRoute, useNavigate } from "@tanstack/react-router";
+import { Plus } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { InitiativeList } from "@/components/InitiativeList";
+import { CreateInitiativeDialog } from "@/components/CreateInitiativeDialog";
 
-export const Route = createFileRoute('/initiatives/')({
+export const Route = createFileRoute("/initiatives/")({
   component: DashboardPage,
-})
+});
+
+type StatusFilter = "all" | "active" | "completed" | "archived";
+
+const filterOptions: { value: StatusFilter; label: string }[] = [
+  { value: "all", label: "All" },
+  { value: "active", label: "Active" },
+  { value: "completed", label: "Completed" },
+  { value: "archived", label: "Archived" },
+];
 
 function DashboardPage() {
-  const health = trpc.health.useQuery()
+  const navigate = useNavigate();
+  const [statusFilter, setStatusFilter] = useState<StatusFilter>("all");
+  const [createDialogOpen, setCreateDialogOpen] = useState(false);
+
   return (
-    <div>
-      <h1 className="text-2xl font-bold">Initiative Dashboard</h1>
-      <p className="text-muted-foreground mt-2">
-        Server: {health.data?.status ?? 'connecting...'}
-      </p>
-      <p className="text-muted-foreground mt-1">Content coming in Phase 17</p>
+    <div className="space-y-6">
+      {/* Page header */}
+      <div className="flex items-center justify-between">
+        <h1 className="text-2xl font-bold">Initiatives</h1>
+        <div className="flex items-center gap-3">
+          <select
+            value={statusFilter}
+            onChange={(e) =>
+              setStatusFilter(e.target.value as StatusFilter)
+            }
+            className="rounded-md border border-input bg-background px-3 py-1.5 text-sm ring-offset-background focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2"
+          >
+            {filterOptions.map((opt) => (
+              <option key={opt.value} value={opt.value}>
+                {opt.label}
+              </option>
+            ))}
+          </select>
+          <Button size="sm" onClick={() => setCreateDialogOpen(true)}>
+            <Plus className="mr-1 h-4 w-4" />
+            New Initiative
+          </Button>
+        </div>
+      </div>
+
+      {/* Initiative list */}
+      <InitiativeList
+        statusFilter={statusFilter}
+        onCreateNew={() => setCreateDialogOpen(true)}
+        onViewInitiative={(id) =>
+          navigate({ to: "/initiatives/$id", params: { id } })
+        }
+        onSpawnArchitect={(_initiativeId, _mode) => {
+          // Architect spawning is self-contained within SpawnArchitectDropdown
+          // This callback is available for future toast notifications
+        }}
+        onDeleteInitiative={(_id) => {
+          // Delete is a placeholder (no deleteInitiative tRPC procedure yet)
+          // ActionMenu handles this internally when implemented
+        }}
+      />
+
+      {/* Create initiative dialog */}
+      <CreateInitiativeDialog
+        open={createDialogOpen}
+        onOpenChange={setCreateDialogOpen}
+      />
     </div>
-  )
+  );
 }