feat: analytics parity — tool cost, date ranges, budgets, query explorer, replay, snapshots (v2.4.0)

Analytics parity phases 2–7 (docs/plans/analytics-parity/), built on
138e706 and ported onto v2.3.1:
- Cost by AI tool (?tool= on cost/analytics/stats/workflows, by_tool,
  Codex fast/priority and flex tiers, agenthub_cost_usd_total{tool,model})
- Date ranges (from/to) on cost/analytics/workflows; Analytics range select
  with Today / This week (Monday) / This month (1st) / 7d / 30d / 90d / All /
  Custom; workflow filters carried into workflow-stats.js (read worker)
- Budgets and cost alerts as alert rule types (alert_rules rebuilt without
  its rule_type CHECK), GET /api/budgets/status, rule preview, spend pace,
  status-bar budget chip; rules stay editable in place
- Query Explorer (/query, allowlisted sort, CSV/JSON export) and scheduled
  reports (report_definitions/report_runs, Settings → Reports)
- Session Replay tab and immutable snapshots (session_snapshots, /snapshot/:token)
- Remote Codex sync, push ingest with a hashed token, privacy redaction and
  ignored folders (Settings → Data), Cursor sessions (no cost)
- Read-only MCP server, statusline, Grafana/Prometheus files

Also: resizable sidebar, pet run/wave animations, the workspace home keeps a
half-typed prompt, and the pre-commit hook runs only the related tests for a
small commit.

client/src/components/lanes/WorkspaceHome.tsx

@@ -125,7 +125,23 @@ function HomeBody({
   const entry = aiTools.byId(tool);
   const claude = tool === "claude";
   const codex = tool === "codex";
-  const [prompt, setPrompt] = useState("");
+  // The half-typed prompt survives leaving the page or the workspace.
+  const draftKey = `agenthub.workspace.draft.${lane.id}`;
+  const [prompt, setPrompt] = useState(() => {
+    try {
+      return localStorage.getItem(draftKey) ?? "";
+    } catch {
+      return "";
+    }
+  });
+  useEffect(() => {
+    try {
+      if (prompt) localStorage.setItem(draftKey, prompt);
+      else localStorage.removeItem(draftKey);
+    } catch {
+      /* storage unavailable: the draft just does not survive */
+    }
+  }, [draftKey, prompt]);
   const [images, setImages] = useState<PromptImage[]>([]);
   const [router, setRouter] = useSessionRouter();
   const routers = useAiRouters();

client/src/components/lanes/__tests__/WorkspaceHome.test.tsx

@@ -193,7 +193,9 @@ describe("freeSlot / paneRunId", () => {
   it("picks the first slot no live run of this lane holds", () => {
     expect(freeSlot(1, [])).toBe(0);
     expect(freeSlot(1, runs)).toBe(1);
-    const all = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9].map((slot) => ({ laneId: 1, slot, status: "running" }) as RunHandle);
+    const all = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9].map(
+      (slot) => ({ laneId: 1, slot, status: "running" }) as RunHandle
+    );
     expect(freeSlot(1, all)).toBeNull();
     expect(freeSlot(1, all.slice(0, 4))).toBe(4);
     expect(freeSlot(2, all)).toBe(0);
@@ -222,6 +224,23 @@ describe("WorkspaceHome", () => {
     );
   });
 
+  it("keeps a half-typed prompt per workspace across a remount, and drops it once sent", async () => {
+    const user = userEvent.setup();
+    const first = renderHome();
+    await screen.findByTestId("workspace-recent-s-live");
+    await user.type(screen.getByLabelText("How can I help you today?"), "long draft");
+    first.unmount();
+    const other = renderHome(lane({ id: 2 }));
+    await screen.findByTestId("workspace-recent-s-live");
+    expect(screen.getByLabelText("How can I help you today?")).toHaveValue("");
+    other.unmount();
+    renderHome();
+    await screen.findByTestId("workspace-recent-s-live");
+    expect(screen.getByLabelText("How can I help you today?")).toHaveValue("long draft");
+    await user.click(screen.getByTestId("workspace-home-start"));
+    await waitFor(() => expect(localStorage.getItem("agenthub.workspace.draft.1")).toBeNull());
+  });
+
   it("keeps AI and Model (with effort) in the box, Router/Permission/Worktree under it", async () => {
     renderHome();
     await screen.findByTestId("workspace-recent-s-live");