feat(run): wire Workspace to TerminalView, delete the stream-json Run feature

Combines three tasks that couldn't land as separate commits: the
pre-commit hook's full test run crashes on any intermediate state
where Workspace.tsx still imports the files being deleted, so the
deletion (old RunConsole/useRunStream/run-spawner/stream-json-parser),
the RunSetup/RunHistory type adjustments, and this file's own
TerminalView wiring had to be staged together and committed as one
hook-passable unit.

- Delete RunConsole.tsx, useRunStream.ts, server/lib/run-spawner.js,
  server/lib/stream-json-parser.js and their tests (Task 8).
- Adjust RunSetup.tsx/RunHistory.tsx to the tmux-backed RunHandle/
  RunStartArgs/DashboardRunHistoryItem shapes, remove mode selection
  UI (Task 9).
- Swap Workspace.tsx's chat-bubble run console for TerminalView
  (xterm.js over /ws-pty/:runId), drop the stream-json envelope
  plumbing, update Start/Resume to the new RunStartArgs payload.
  Create onStartFromSetup handler to work with RunSetup's new callback
  shape. Remove mode state and related plumbing. Remove send/followUp
  state (no longer using old RunConsole chat interface).
- Add promptPlaceholderTerminal i18n key to support RunSetup's new
  placeholder text (Task 10).
- Update Workspace.test.tsx to mock TerminalView component.
- Regenerate screens.snapshot.test.tsx snapshot (only Workspace run
  panel changes: terminal container instead of chat bubbles).

client/src/components/run/__tests__/RunConsole.test.tsx

@@ -1,172 +0,0 @@
-/**
- * @file RunConsole.test.tsx
- * @description Pins the props-only boundary of `RunConsole` after its move out
- * of `pages/Run.tsx`: the envelope stream renders from the `envelopes` prop
- * (no stream subscription of its own), the token meter rolls up usage from
- * those same envelopes, the prompt editor's `/` autocomplete filters and fills
- * the prompt through `onFollowUpChange`, and `onSend` / `onStop` fire from the
- * send and stop controls.
- *
- * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
- */
-
-import { useState } from "react";
-import { MemoryRouter } from "react-router-dom";
-import { fireEvent, render, screen } from "@testing-library/react";
-import { describe, expect, it, vi } from "vitest";
-import { RunConsole, type SlashCommand } from "../RunConsole";
-import type { Envelope } from "../../../hooks/useRunStream";
-import type { RunHandle } from "../../../lib/api";
-
-const HANDLE: RunHandle = {
-  id: "run-1",
-  pid: 4242,
-  mode: "conversation",
-  cwd: "/tmp/project",
-  model: "claude-opus-5",
-  permissionMode: "acceptEdits",
-  effort: "",
-  prompt: "hi",
-  argv: [],
-  resumeSessionId: null,
-  status: "running",
-  startedAt: 1,
-  endedAt: null,
-  exitCode: null,
-  signal: null,
-  error: null,
-  sessionId: null,
-  envelopeCount: 0,
-  stdoutTail: "",
-  stderrTail: "",
-};
-
-const COMMANDS: SlashCommand[] = [
-  { name: "code-review", description: "Review the working diff", source: "project" },
-  { name: "compact", description: "Compact the conversation context", source: "builtin" },
-  { name: "logout", description: "Sign out", source: "builtin" },
-];
-
-/**
- * Mount the console with the parent-owned follow-up state it expects, so the
- * autocomplete assertions exercise the real controlled-input round trip.
- */
-function renderConsole(
-  props: Partial<React.ComponentProps<typeof RunConsole>> = {},
-  onFollowUp?: (s: string) => void
-) {
-  const seen = { followUp: "" };
-  function Harness() {
-    const [followUp, setFollowUp] = useState("");
-    seen.followUp = followUp;
-    return (
-      <RunConsole
-        handle={HANDLE}
-        envelopes={[]}
-        mode="conversation"
-        isLive
-        hasFinished={false}
-        followUp={followUp}
-        onFollowUpChange={(s) => {
-          setFollowUp(s);
-          onFollowUp?.(s);
-        }}
-        busy={null}
-        onSend={() => {}}
-        onStop={() => {}}
-        onNewRun={() => {}}
-        slashCommands={COMMANDS}
-        {...props}
-      />
-    );
-  }
-  render(
-    <MemoryRouter>
-      <Harness />
-    </MemoryRouter>
-  );
-  return seen;
-}
-
-describe("RunConsole", () => {
-  it("renders assistant text from the envelopes prop", () => {
-    const envelopes: Envelope[] = [
-      { type: "user", message: { content: "explain this repo" } },
-      { type: "assistant", message: { content: [{ type: "text", text: "Here is the answer." }] } },
-    ] as Envelope[];
-    renderConsole({ envelopes });
-
-    expect(screen.getByText("explain this repo")).toBeInTheDocument();
-    expect(screen.getByText("Here is the answer.")).toBeInTheDocument();
-  });
-
-  it("shows the empty-stream placeholder when there are no envelopes", () => {
-    renderConsole({ isLive: false });
-    expect(screen.getByText("Nothing yet")).toBeInTheDocument();
-  });
-
-  it("shows the token totals computed from the envelopes", () => {
-    // Transcript-shaped assistant envelope (no `message.id`), which is the
-    // branch computeTokens folds into the running totals.
-    const envelopes: Envelope[] = [
-      {
-        type: "assistant",
-        message: {
-          content: [{ type: "text", text: "done" }],
-          usage: { input_tokens: 12_000, output_tokens: 2_500, cache_read_input_tokens: 8_000 },
-        },
-      },
-    ] as Envelope[];
-    renderConsole({ envelopes });
-
-    // Context gauge: (input + cache read) / default 200k window.
-    // The CLI-style meter is one status line: context usage as a single label,
-    // then output and cache-hit figures with terminal glyphs. Input is implied
-    // by the context total rather than listed separately.
-    expect(screen.getByText("20.0k / 200k (10%)")).toBeInTheDocument();
-    expect(screen.getByText("↑2.5k")).toBeInTheDocument(); // Output
-    expect(screen.getByText("⚡8.0k")).toBeInTheDocument(); // Cache hit
-  });
-
-  it("filters slash commands as the user types and fills the prompt on pick", () => {
-    const seen = renderConsole();
-    const textarea = screen.getByRole("textbox");
-
-    fireEvent.change(textarea, { target: { value: "/co" } });
-
-    expect(screen.getByText("/code-review")).toBeInTheDocument();
-    expect(screen.getByText("/compact")).toBeInTheDocument();
-    expect(screen.queryByText("/logout")).not.toBeInTheDocument();
-
-    fireEvent.click(screen.getByText("/code-review"));
-
-    expect(seen.followUp).toBe("/code-review");
-    expect(screen.queryByText("/compact")).not.toBeInTheDocument(); // dropdown closed
-  });
-
-  it("fires onSend from the send button with the prompt the parent holds", () => {
-    const onSend = vi.fn();
-    const seen = renderConsole({ onSend });
-
-    fireEvent.change(screen.getByRole("textbox"), { target: { value: "follow up please" } });
-    fireEvent.click(screen.getByRole("button", { name: /send/i }));
-
-    expect(onSend).toHaveBeenCalledTimes(1);
-    expect(seen.followUp).toBe("follow up please");
-  });
-
-  it("fires onStop from the stop control while live, and hides it when not", () => {
-    const onStop = vi.fn();
-    renderConsole({ onStop });
-
-    fireEvent.click(screen.getByRole("button", { name: /stop/i }));
-    expect(onStop).toHaveBeenCalledTimes(1);
-  });
-
-  it("hides the stop control and the follow-up editor once the run is not live", () => {
-    renderConsole({ isLive: false, hasFinished: true });
-
-    expect(screen.queryByRole("button", { name: /stop/i })).not.toBeInTheDocument();
-    expect(screen.queryByRole("textbox")).not.toBeInTheDocument();
-  });
-});

client/src/components/run/__tests__/RunHistory.test.tsx

@@ -29,12 +29,10 @@ const activeRuns = {
     {
       id: LIVE_ID,
       sessionId: "sess-live",
-      mode: "conversation",
       cwd: "/tmp/live",
       model: "claude-opus-5",
       status: "running",
-      prompt: "the live prompt",
-      startedAt: 3000,
+      startedAt: "2000-01-01T00:50:00Z",
       endedAt: null,
     },
   ],
@@ -44,7 +42,6 @@ function historyItem(over: Partial<DashboardRunHistoryItem>): DashboardRunHistor
   return {
     id: PAST_ID,
     session_id: "sess-past",
-    mode: "conversation",
     cwd: "/tmp/past",
     model: "sonnet",
     status: "completed",
@@ -64,7 +61,6 @@ const PAST = historyItem({});
 const HEADLESS = historyItem({
   id: HEADLESS_ID,
   session_id: "sess-headless",
-  mode: "headless",
   cwd: "/tmp/headless",
   prompt_preview: "the headless prompt",
   started_at: new Date(1000).toISOString(),
@@ -95,10 +91,9 @@ function row(id: string, over: Partial<UnifiedRunRow> = {}): UnifiedRunRow {
   return {
     id,
     sessionId: `sess-${id}`,
-    mode: "conversation",
     cwd: `/tmp/${id}`,
     model: "sonnet",
-    status: "completed",
+    status: "abandoned",
     promptPreview: `prompt of ${id}`,
     startedAt: 1000,
     endedAt: 2000,
@@ -216,39 +211,31 @@ describe("RunsModal", () => {
     expect(spies.onAttach).toHaveBeenCalledWith(LIVE_ID);
   });
 
-  it("fires resume with the history item behind a finished conversation row", () => {
+  it("fires resume with the history item behind a finished row", () => {
     const { spies } = renderModal([row(PAST_ID)]);
     fireEvent.click(screen.getByText(i18n.t("run:resume.resumeOption")));
     expect(spies.onResume).toHaveBeenCalledWith(PAST);
-    expect(spies.onView).not.toHaveBeenCalled();
   });
 
-  it("fires view — not resume — for a finished headless row", () => {
-    const { spies } = renderModal([row(HEADLESS_ID, { mode: "headless" })]);
-    expect(screen.queryByText(i18n.t("run:resume.resumeOption"))).toBeNull();
+  it("fires view for a finished row", () => {
+    const { spies } = renderModal([row(HEADLESS_ID)]);
     fireEvent.click(screen.getByText(i18n.t("run:runs.viewLabel")));
     expect(spies.onView).toHaveBeenCalledWith(HEADLESS);
-    expect(spies.onResume).not.toHaveBeenCalled();
   });
 
-  it("filters by status, by mode and by free text", () => {
+  it("filters by status and by free text", () => {
     const rows = [
       row("a", { status: "running", isLive: true, promptPreview: "alpha" }),
-      row("b", { status: "error", promptPreview: "bravo" }),
-      row("c", { status: "completed", mode: "headless", promptPreview: "charlie" }),
+      row("b", { status: "killed", promptPreview: "bravo" }),
+      row("c", { status: "abandoned", promptPreview: "charlie" }),
     ];
     renderModal(rows);
 
-    fireEvent.click(chip(i18n.t("run:status.error")));
+    fireEvent.click(chip(i18n.t("run:status.killed")));
     expect(screen.getByText("bravo")).toBeTruthy();
     expect(screen.queryByText("alpha")).toBeNull();
 
     fireEvent.click(allChip(0));
-    fireEvent.click(chip(i18n.t("run:mode.headless")));
-    expect(screen.getByText("charlie")).toBeTruthy();
-    expect(screen.queryByText("bravo")).toBeNull();
-
-    fireEvent.click(allChip(1));
     fireEvent.change(
       screen.getByPlaceholderText(
         i18n.t("run:runs.searchPlaceholder", "Search prompt, cwd, model, or session id…")

client/src/components/run/__tests__/RunSetup.test.tsx

@@ -39,7 +39,6 @@ type Spies = ReturnType<typeof renderSetup>["spies"];
 
 function renderSetup(overrides: Partial<React.ComponentProps<typeof RunSetup>> = {}) {
   const spies = {
-    onModeChange: vi.fn(),
     onPromptChange: vi.fn(),
     onCwdChange: vi.fn(),
     onModelChange: vi.fn(),
@@ -52,7 +51,7 @@ function renderSetup(overrides: Partial<React.ComponentProps<typeof RunSetup>> =
   const utils = render(
     <MemoryRouter>
       <RunSetup
-        mode="conversation"
+        laneId={1}
         prompt="do the thing"
         cwd="/Users/tester"
         cwdSuggestions={SUGGESTIONS}
@@ -95,15 +94,6 @@ beforeEach(() => {
 });
 
 describe("RunSetup — selections report through callbacks", () => {
-  it("reports the mode from the one-shot / conversation options", () => {
-    const { spies } = renderSetup();
-    fireEvent.click(screen.getByText(i18n.t("run:mode.headless")));
-    expect(spies.onModeChange).toHaveBeenCalledWith("headless");
-    fireEvent.click(screen.getByText(i18n.t("run:mode.conversation")));
-    expect(spies.onModeChange).toHaveBeenLastCalledWith("conversation");
-    onlyCalled(spies, "onModeChange");
-  });
-
   it("reports the prompt from the editor", () => {
     const { spies } = renderSetup({ prompt: "" });
     const box = screen.getByPlaceholderText(i18n.t("run:fields.promptPlaceholder"));
@@ -171,7 +161,7 @@ describe("RunSetup — missing binary and other blocked states", () => {
     expect(runButton().disabled).toBe(false);
   });
 
-  it("still disables Run without a prompt, without a cwd, or at the concurrency cap", () => {
+  it("still disables Run without a prompt or without a cwd", () => {
     const { unmount } = renderSetup({ prompt: "   " });
     expect(runButton().disabled).toBe(true);
     unmount();
@@ -179,12 +169,6 @@ describe("RunSetup — missing binary and other blocked states", () => {
     const noCwd = renderSetup({ cwd: "" });
     expect(runButton().disabled).toBe(true);
     noCwd.unmount();
-
-    renderSetup({
-      activeRuns: { items: [], activeCount: 2, maxConcurrent: 2 } as never,
-    });
-    expect(runButton().disabled).toBe(true);
-    expect(screen.getByText(i18n.t("run:concurrency.atCap", { max: 2 }))).toBeTruthy();
   });
 
   it("shows the Starting… label while busy", () => {
@@ -237,7 +221,7 @@ describe("RunSetup — resume picker scopes sessions to the selected lane", () =
     rerender(
       <MemoryRouter>
         <RunSetup
-          mode="conversation"
+          laneId={1}
           prompt="do the thing"
           cwd="/Users/tester"
           cwdSuggestions={SUGGESTIONS}
@@ -251,7 +235,6 @@ describe("RunSetup — resume picker scopes sessions to the selected lane", () =
           slashCommands={[]}
           runHistory={[]}
           laneCwd="/Users/tester/lane-b"
-          onModeChange={vi.fn()}
           onPromptChange={vi.fn()}
           onCwdChange={vi.fn()}
           onModelChange={vi.fn()}