Add Project Home, Auth Bridge, shared auth token, and Tier-1 polish

Project Home (DESIGN-REVIEW §B2): the project is promoted from a 280px
sidebar card to a first-class main-area view. ProjectCard.tsx (1,257
lines) is replaced by a select-only ProjectRow plus tabs for Overview,
Sessions, Automation, Config and Files. The PortMappings, FileManager
and ContainerProgress modals are absorbed rather than reimplemented.
Config gains a Saved/Saving/Failed indicator — save-on-blur failures
previously reached only console.error.

Tier-1 polish (DESIGN-REVIEW §A): new elevation, muted-accent, disabled
and focus-ring tokens; a global :focus-visible ring with every
focus:outline-none removed; filled buttons moved to --accent-emphasis
and white-on-success toggles retired, fixing three WCAG AA failures
(2.1:1, 2.5:1, 2.4:1); a shared Modal primitive with role="dialog",
focus trap and restore, adopted by all remaining modals; status
indicators that carry a glyph and word rather than colour alone.

Ctrl+Shift+W closes a tab, deliberately not Ctrl+W — that is readline's
kill-word, used constantly in the terminal this app is built around.

Auth Bridge: a general loopback-callback bridge so browser logins run
inside a container (aws sso login, Concourse fly login, claude login)
can complete against the host browser. Listeners are discovered from
/proc/net/tcp{,6} — ss/netstat/lsof are absent from the image — bound on
host 127.0.0.1 only, and tunnelled in over the Docker API via socat,
which keeps working on Docker Desktop where container IPs are not
routable. Falls back to [::1] because Node resolves localhost to IPv6
first, so claude login often binds ::1 alone. Opt-in per project.

This extracts create_attached_exec() and moves the existing terminal
session path onto it, so there is one attached-exec implementation
rather than two.

Shared auth token: `claude setup-token` is run in a container, the token
is stored in the OS keychain and injected as CLAUDE_CODE_OAUTH_TOKEN
into Anthropic-backend projects. Contrary to the initial design note,
setup-token uses an Anthropic-hosted redirect and blocks on a stdin
paste prompt rather than a loopback callback, so a stdin command is
required for the flow to complete.

The token is never logged, never returned to the frontend, and is
redacted from the streamed output with a stateful matcher that withholds
any tail that could still grow into a secret. Change detection uses a
random rotation id rather than a hash, since a hash in a docker-inspect
readable label would be an offline verification oracle.

Frontend 33 -> 51 tests; Rust 34 tests. Both builds clean.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

app/src/components/ui/Modal.test.tsx

@@ -0,0 +1,118 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { render, screen, fireEvent, act } from "@testing-library/react";
+import Modal from "./Modal";
+
+/**
+ * Modal focuses asynchronously via rAF so the panel is laid out first; jsdom
+ * needs that flushed manually.
+ */
+async function flushFocus() {
+  await act(async () => {
+    vi.advanceTimersByTime(20);
+  });
+}
+
+describe("Modal", () => {
+  beforeEach(() => {
+    vi.useFakeTimers({ toFake: ["requestAnimationFrame", "setTimeout"] });
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("exposes dialog semantics and an accessible name", async () => {
+    render(
+      <Modal title="Remove Project" onClose={vi.fn()}>
+        <p>body</p>
+      </Modal>,
+    );
+    const dialog = screen.getByRole("dialog", { name: "Remove Project" });
+    expect(dialog).toHaveAttribute("aria-modal", "true");
+  });
+
+  it("moves focus into the dialog on open", async () => {
+    render(
+      <Modal title="Dialog" onClose={vi.fn()}>
+        <button>First</button>
+        <button>Second</button>
+      </Modal>,
+    );
+    await flushFocus();
+    const dialog = screen.getByRole("dialog");
+    expect(dialog.contains(document.activeElement)).toBe(true);
+  });
+
+  it("traps Tab inside the dialog, wrapping at both ends", async () => {
+    render(
+      <Modal title="Dialog" onClose={vi.fn()} hideCloseButton>
+        <button>First</button>
+        <button>Last</button>
+      </Modal>,
+    );
+    await flushFocus();
+
+    const first = screen.getByRole("button", { name: "First" });
+    const last = screen.getByRole("button", { name: "Last" });
+
+    last.focus();
+    fireEvent.keyDown(document, { key: "Tab" });
+    expect(document.activeElement).toBe(first);
+
+    first.focus();
+    fireEvent.keyDown(document, { key: "Tab", shiftKey: true });
+    expect(document.activeElement).toBe(last);
+  });
+
+  it("restores focus to the trigger on unmount", async () => {
+    const trigger = document.createElement("button");
+    document.body.appendChild(trigger);
+    trigger.focus();
+
+    const { unmount } = render(
+      <Modal title="Dialog" onClose={vi.fn()}>
+        <button>Inside</button>
+      </Modal>,
+    );
+    await flushFocus();
+    expect(document.activeElement).not.toBe(trigger);
+
+    unmount();
+    expect(document.activeElement).toBe(trigger);
+    trigger.remove();
+  });
+
+  it("closes on Escape and on an overlay click", async () => {
+    const onClose = vi.fn();
+    const { container } = render(
+      <Modal title="Dialog" onClose={onClose}>
+        <p>body</p>
+      </Modal>,
+    );
+    await flushFocus();
+
+    fireEvent.keyDown(document, { key: "Escape" });
+    expect(onClose).toHaveBeenCalledTimes(1);
+
+    // The overlay is the portal root's only child.
+    const overlay = document.querySelector(".fixed.inset-0");
+    expect(overlay).not.toBeNull();
+    fireEvent.click(overlay!);
+    expect(onClose).toHaveBeenCalledTimes(2);
+    expect(container).toBeTruthy();
+  });
+
+  it("ignores Escape and overlay clicks when not dismissible", async () => {
+    const onClose = vi.fn();
+    render(
+      <Modal title="Installing" onClose={onClose} dismissible={false}>
+        <p>body</p>
+      </Modal>,
+    );
+    await flushFocus();
+
+    fireEvent.keyDown(document, { key: "Escape" });
+    fireEvent.click(document.querySelector(".fixed.inset-0")!);
+    expect(onClose).not.toHaveBeenCalled();
+  });
+});