feat(agent-api): GET /api/agent/projects

Implements the route to fetch all projects across all clients the owner has.
No status filtering—agents drafting a plan need to see paused/completed projects.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/app/api/agent/projects/route.ts

@@ -0,0 +1,42 @@
+import { getAdminPb } from "@/lib/pb/admin";
+import { requireAgentToken } from "@/lib/agent/auth";
+import { jsonOk } from "@/lib/http/json";
+import type { ClientRecord, ProjectRecord } from "@/lib/pb/types";
+
+/**
+ * GET /api/agent/projects — every project across every client the owner has.
+ *
+ * No status filtering: an agent drafting a plan needs to see a paused or
+ * completed project too, not just active ones — it is planning, not
+ * browsing the way the home page is.
+ */
+export async function GET(request: Request): Promise<Response> {
+  const denied = requireAgentToken(request);
+  if (denied) return denied;
+
+  const pb = await getAdminPb();
+
+  const [projects, clients] = await Promise.all([
+    pb.collection("projects").getFullList<ProjectRecord>({ sort: "name" }),
+    pb.collection("clients").getFullList<ClientRecord>(),
+  ]);
+
+  const clientsById = new Map(clients.map((c) => [c.id, c]));
+
+  const out = projects
+    .map((project) => {
+      const client = clientsById.get(project.client);
+      if (!client) return null;
+      return {
+        id: project.id,
+        name: project.name,
+        slug: project.slug,
+        client: { id: client.id, name: client.name, slug: client.slug },
+        kind: project.kind,
+        status: project.status,
+      };
+    })
+    .filter((p): p is NonNullable<typeof p> => p !== null);
+
+  return jsonOk(out);
+}