feat(pet): cleared alerts stay cleared, contextual bubbles, i18n, moments, chat window

- Fix: an errored session alerted on every update, and Clear alerts only
  dropped it in memory, so its next update (or a reload) brought the alert
  straight back. An error now alerts on the transition into error only;
  cleared sessions are remembered (agenthub.pet.dismissedErrors) and stay
  quiet until they recover and fail anew.
- Quips, greetings, notifications and Ask answers move to i18n (EN/VI);
  Ask understands Vietnamese keywords and names the sessions it counts.
- The pet goes by the worn pet's name; click it in the panel to rename
  (agenthub.pet.names, synced to the account).
- Bubbles name the session they are about, with an Open button (never a
  resume); a burst of the same event coalesces into one count.
- Moments: a new session waves, a finish hops, a subagent peeks, a wait taps,
  an error flinches — on Sagi, Codex sprites and still images. Idle fidgets,
  a once-per-session greeting, a "Needs you" list, an amber waiting dot.
- Pat (heart button, Ask, or stroking the pet) reacts on the pet itself, so
  it shows while the panel or chat is open.
- Panel drops Run Claude / Activity / Sessions / Errored.
- Ask hands off to a chat window (PetChat) on the default AI tool
  (Claude/Codex): transcript as bubbles, follow-ups and CLI menus through an
  off-screen attached terminal; no new server route.

Verified on HEAD + this diff in a clean worktree: tsc -b, the full client
suite (1334/1335; the one failure, ConversationView.follow, is flaky under
load and passes 3/3 alone) and server me-prefs.test.js.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

client/src/components/Sagi/__tests__/PetChat.test.ts

@@ -0,0 +1,46 @@
+/**
+ * @file PetChat.test.ts
+ * @description Unit tests for the pet chat's transcript-to-bubbles folding (`chatLines`).
+ * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+ */
+import { describe, it, expect } from "vitest";
+import { chatLines } from "../PetChat";
+import type { TranscriptMessage } from "../../../lib/types";
+
+const msg = (m: Partial<TranscriptMessage>): TranscriptMessage =>
+  ({ type: "user", timestamp: null, content: [], ...m }) as TranscriptMessage;
+
+describe("chatLines", () => {
+  it("keeps the user's words and the assistant's prose, folding tool calls into one chip", () => {
+    const lines = chatLines([
+      msg({ type: "user", sender: "user", content: [{ type: "text", text: "hi" }] }),
+      msg({
+        type: "assistant",
+        content: [
+          { type: "thinking", text: "hmm" },
+          { type: "tool_use", name: "Read" },
+        ],
+      }),
+      msg({ type: "user", sender: "tool", content: [{ type: "tool_result", output: "x" }] }),
+      msg({
+        type: "assistant",
+        content: [
+          { type: "tool_use", name: "Read" },
+          { type: "text", text: "hello!" },
+        ],
+      }),
+    ]);
+    expect(lines.map((l) => (l.role === "tools" ? l.names : l.text))).toEqual([
+      "hi",
+      ["Read", "Read"],
+      "hello!",
+    ]);
+  });
+
+  it("drops Claude Code's own injected lines", () => {
+    const lines = chatLines([
+      msg({ sender: "user", content: [{ type: "text", text: "<command-name>/clear</command-name>" }] }),
+    ]);
+    expect(lines).toEqual([]);
+  });
+});

client/src/components/Sagi/__tests__/Pets.test.tsx

@@ -261,7 +261,7 @@ describe("PetMenu", () => {
     renderMenu();
     fireEvent.click(screen.getByTestId("pet-choose"));
     fireEvent.click(await screen.findByTestId("pet-featured-goku"));
-    await waitFor(() => expect(sagiPrefs.getPet()).toEqual({ id: "cp-goku", kind: "codex" }));
+    await waitFor(() => expect(sagiPrefs.getPet()).toEqual({ id: "cp-goku", kind: "codex", name: "Goku" }));
     expect(api.pets.installFeatured).toHaveBeenCalledWith("goku");
   });
 
@@ -284,7 +284,7 @@ describe("PetMenu", () => {
     });
     fireEvent.change(screen.getByTestId("pet-image-input"), { target: { files: [file] } });
     await waitFor(() =>
-      expect(sagiPrefs.getPet()).toEqual({ id: "p-bbbbbbbbbbbb", kind: "image" })
+      expect(sagiPrefs.getPet()).toEqual({ id: "p-bbbbbbbbbbbb", kind: "image", name: "Dog" })
     );
     expect(api.pets.upload).toHaveBeenCalledWith(file);
   });
@@ -313,11 +313,11 @@ describe("PetSettings", () => {
   it("downloads a featured pet on its first pick, wears an own one, deletes it back to Sagi", async () => {
     render(<PetSettings />);
     fireEvent.click(await screen.findByTestId("pet-card-featured-goku"));
-    await waitFor(() => expect(sagiPrefs.getPet()).toEqual({ id: "cp-goku", kind: "codex" }));
+    await waitFor(() => expect(sagiPrefs.getPet()).toEqual({ id: "cp-goku", kind: "codex", name: "Goku" }));
     expect(api.pets.installFeatured).toHaveBeenCalledWith("goku");
 
     fireEvent.click(screen.getByTestId("pet-card-own-p-aaaaaaaaaaaa"));
-    expect(sagiPrefs.getPet()).toEqual({ id: "p-aaaaaaaaaaaa", kind: "image" });
+    expect(sagiPrefs.getPet()).toEqual({ id: "p-aaaaaaaaaaaa", kind: "image", name: "My cat" });
     fireEvent.click(screen.getByTestId("pet-card-own-p-aaaaaaaaaaaa-delete"));
     answerConfirm(true);
     await waitFor(() => expect(sagiPrefs.getPet()).toEqual({ id: "sagi" }));
@@ -329,7 +329,7 @@ describe("PetSettings", () => {
     const file = new File([new Uint8Array([0x89, 0x50])], "Dog.png", { type: "image/png" });
     fireEvent.change(screen.getByTestId("pet-settings-image-input"), { target: { files: [file] } });
     await waitFor(() =>
-      expect(sagiPrefs.getPet()).toEqual({ id: "p-bbbbbbbbbbbb", kind: "image" })
+      expect(sagiPrefs.getPet()).toEqual({ id: "p-bbbbbbbbbbbb", kind: "image", name: "Dog" })
     );
   });
 

client/src/components/Sagi/__tests__/Sagi.test.tsx

@@ -88,6 +88,89 @@ describe("Sagi widget", () => {
     expect(within(btn).getByText("1")).toBeInTheDocument();
   });
 
+  it("names the errored session in its bubble and in the panel", () => {
+    renderSagi();
+    act(() => {
+      eventBus.publish({
+        type: "session_updated",
+        data: { id: "a", status: "error", name: "Fix login", cwd: "/w/app", lane_id: 3 } as Session,
+        timestamp: "t",
+      });
+    });
+    const bubble = screen.getByRole("status");
+    expect(within(bubble).getByText("Fix login")).toBeInTheDocument();
+    expect(within(bubble).getByRole("button", { name: "Open" })).toBeInTheDocument();
+    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
+    const panel = screen.getByRole("dialog", { name: /sagi companion/i });
+    expect(within(panel).getByText("Needs you")).toBeInTheDocument();
+    expect(within(panel).getByRole("button", { name: /Fix login/ })).toBeInTheDocument();
+  });
+
+  it("stays quiet about a cleared error when that session updates again", () => {
+    renderSagi();
+    act(() => {
+      eventBus.publish(sessionMsg("a", "error"));
+    });
+    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
+    fireEvent.click(screen.getByRole("button", { name: "Clear alerts" }));
+    act(() => {
+      eventBus.publish(sessionMsg("a", "error"));
+    });
+    const btn = screen.getByRole("button", { name: /close sagi/i, expanded: true });
+    expect(within(btn).queryByText("1")).not.toBeInTheDocument();
+    expect(JSON.parse(localStorage.getItem("agenthub.pet.dismissedErrors")!)).toEqual(["a"]);
+  });
+
+  it("renames the pet from the panel header", () => {
+    renderSagi();
+    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
+    fireEvent.click(screen.getByRole("button", { name: /rename sagi/i }));
+    const input = screen.getByLabelText("Pet name");
+    fireEvent.change(input, { target: { value: "Mochi" } });
+    fireEvent.keyDown(input, { key: "Enter" });
+    expect(screen.getByRole("dialog", { name: /mochi companion/i })).toBeInTheDocument();
+    expect(screen.getByLabelText(/ask mochi/i)).toBeInTheDocument();
+  });
+
+  it("hands a question it cannot answer to the chat window", () => {
+    localStorage.setItem("agenthub.defaultTool", "claude");
+    renderSagi();
+    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
+    const input = screen.getByLabelText(/ask sagi/i);
+    fireEvent.change(input, { target: { value: "write me a haiku" } });
+    fireEvent.submit(input.closest("form")!);
+    const chat = screen.getByRole("dialog", { name: /chat with sagi/i });
+    expect(within(chat).getByText("write me a haiku")).toBeInTheDocument();
+    expect(screen.queryByRole("dialog", { name: /sagi companion/i })).not.toBeInTheDocument();
+  });
+
+  it("opens the chat from the panel and goes back to it", () => {
+    renderSagi();
+    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
+    fireEvent.click(screen.getByRole("button", { name: /chat with sagi/i }));
+    expect(screen.getByRole("dialog", { name: /chat with sagi/i })).toBeInTheDocument();
+    fireEvent.click(screen.getByRole("button", { name: "Back" }));
+    expect(screen.getByRole("dialog", { name: /sagi companion/i })).toBeInTheDocument();
+  });
+
+  it("a pat shows its reaction on the pet even while the panel is open", () => {
+    renderSagi();
+    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
+    fireEvent.click(screen.getByRole("button", { name: /pat sagi/i }));
+    const pet = screen.getByRole("button", { name: /close sagi/i, expanded: true });
+    expect(pet.querySelector(".sagi-reaction-text")?.textContent).toBeTruthy();
+  });
+
+  it("stroking the pet back and forth pats it", () => {
+    renderSagi();
+    const pet = screen.getByRole("button", { name: /open sagi companion/i });
+    const xs = [100, 130, 100, 130, 100, 130, 100];
+    act(() => {
+      for (const x of xs) fireEvent.pointerMove(pet, { clientX: x, clientY: 50, buttons: 0 });
+    });
+    expect(pet.querySelector(".sagi-reaction-text")).not.toBeNull();
+  });
+
   it("reflects the live count in the panel status", () => {
     renderSagi();
     act(() => {

client/src/components/Sagi/__tests__/brain.test.ts

@@ -225,6 +225,43 @@ describe("clearErrors", () => {
     expect(statusOf(s).liveCount).toBe(1);
     expect(s.worriedUntil).toBe(0);
   });
+
+  it("keeps a cleared session quiet while it stays errored", () => {
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("b", "error"), T0));
+    s = clearErrors(s);
+    const again = reduceSagi(s, sessionMsg("b", "error", T0 + 1), T0 + 1);
+    expect(again.pulse).toBeNull();
+    expect(statusOf(again.state).errorCount).toBe(0);
+    expect(again.state.worriedUntil).toBe(0);
+    const ev = reduceSagi(
+      again.state,
+      { type: "new_event", data: { session_id: "b", event_type: "toolError" }, timestamp: "" } as WSMessage,
+      T0 + 2
+    );
+    expect(ev.pulse).toBeNull();
+    expect(seedSessions(s, [{ id: "b", status: "error" }], T0).sessions.b).toBeUndefined();
+  });
+
+  it("alerts again once a cleared session recovers and fails anew", () => {
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("b", "error"), T0));
+    s = clearErrors(s);
+    ({ state: s } = reduceSagi(s, sessionMsg("b", "active"), T0));
+    expect(s.dismissed).not.toHaveProperty("b");
+    const r = reduceSagi(s, sessionMsg("b", "error"), T0);
+    expect(r.pulse).toBe("error");
+  });
+});
+
+describe("error alerts fire on the transition only", () => {
+  it("does not re-alert on each update of a still-errored session", () => {
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "error"), T0));
+    const r = reduceSagi(s, sessionMsg("a", "error"), T0 + 10_000);
+    expect(r.pulse).toBeNull();
+    expect(statusOf(r.state).errorCount).toBe(1);
+  });
 });
 
 // Reference the imported constant so it is exercised and tsc-clean.

client/src/components/Sagi/__tests__/intents.test.ts

@@ -75,4 +75,27 @@ describe("matchIntent", () => {
     const r = matchIntent("Refactor my auth module", status());
     expect(r).toEqual({ kind: "handoff", prompt: "Refactor my auth module" });
   });
+
+  it("understands Vietnamese keywords", () => {
+    const r = matchIntent("có lỗi nào không?", status({ errorCount: 2 }));
+    if (r.kind === "answer") expect(r.text).toContain("2 sessions errored");
+    expect(matchIntent("đang chạy gì vậy", status({ liveCount: 1 })).kind).toBe("answer");
+    expect(matchIntent("tình hình sao rồi", status()).kind).toBe("answer");
+  });
+
+  it("names the sessions it reports when it knows them", () => {
+    const r = matchIntent("any errors?", status({ errorCount: 1 }), {
+      attention: [{ id: "a", kind: "error", name: "Fix login", cwd: null, lane_id: null }],
+    });
+    if (r.kind === "answer") expect(r.text).toContain("errored: Fix login");
+  });
+
+  it("introduces itself by the pet's name and reacts to a pat", () => {
+    const who = matchIntent("who are you", status(), { name: "Mochi" });
+    expect(who).toMatchObject({ kind: "answer", moment: "wave" });
+    if (who.kind === "answer") expect(who.text).toContain("Mochi");
+    expect(matchIntent("pat", status())).toMatchObject({ kind: "answer", moment: "jump" });
+    // "pat" inside another word is not a pat.
+    expect(matchIntent("update the path", status()).kind).toBe("handoff");
+  });
 });