feat: Implement workspace rename cli (#3209)

* feat(cli): add workspace rename command

`paseo workspace rename <workspace-id> <title>` sets a workspace's
user-visible title through the existing workspace.title.set RPC, and
`--reset` clears the override so the name reverts to the branch or
directory. The command reads the descriptor back so the output shows
what a reset reverted to.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(cli): harden workspace rename against read-back and arg failures

Review findings on the rename command:

- A failed workspace list sweep after a successful title change reported
  the whole command as failed. The read-back is display-only, so it now
  runs outside the mutation's error path and degrades to a null name.
- Only --reset needs the descriptor read back; a set title is already the
  resolved display name, so the common path no longer pages the list.
- Dropped the `"code" in error` rethrow. Nothing in that block throws a
  CommandError, but DaemonRpcError always carries a `code` property even
  when it is undefined, so the guard let those through to render as
  UNKNOWN_ERROR with a stack instead of WORKSPACE_RENAME_FAILED.
- Commander 12 allows excess positionals, so an unquoted multi-word title
  renamed to its first word and dropped the rest. The command now rejects
  excess arguments.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* refactor(cli): report the rename RPC response instead of reading back

Reading the descriptor back to show what --reset reverted to was the only
reason rename needed a paged workspace sweep, and that sweep dragged in
everything around it: a failure path that could report an applied rename
as failed, a nullable name, and a bespoke warning sink to tell the two
null cases apart.

Sibling commands don't do this. `workspace archive`, `agent mode`, and
`schedule update` all report what the RPC returned and stop; the one
command that reads back is `agent update`, which has the same "applied
but reported as failed" bug. So rename now mirrors `workspace archive`.

`--reset` reports `title: null` rather than naming what it reverted to;
`paseo workspace ls` shows the resolved name. This also reverts the
`collectWorkspaces` extraction, whose only second caller was rename.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

packages/cli/tests/38-workspace-rename.test.ts

@@ -0,0 +1,58 @@
+#!/usr/bin/env npx tsx
+
+import assert from "node:assert";
+import { basename } from "node:path";
+import { createE2ETestContext } from "./helpers/test-daemon.ts";
+
+console.log("=== Workspace Rename Command ===\n");
+
+const ctx = await createE2ETestContext({ timeout: 30000 });
+
+try {
+  const created = await ctx.paseo([
+    "workspace",
+    "create",
+    "--isolation",
+    "local",
+    "--path",
+    ctx.workDir,
+    "--title",
+    "Original title",
+    "--json",
+  ]);
+  assert.strictEqual(created.exitCode, 0, created.stderr);
+  const workspaceId = JSON.parse(created.stdout).workspaceId as string;
+
+  const renamed = await ctx.paseo(["workspace", "rename", workspaceId, "Auth rework", "--json"]);
+  assert.strictEqual(renamed.exitCode, 0, renamed.stderr);
+  assert.deepStrictEqual(JSON.parse(renamed.stdout), {
+    workspaceId,
+    title: "Auth rework",
+  });
+
+  const renamedList = await ctx.paseo(["workspace", "ls", "--json"]);
+  assert.strictEqual(renamedList.exitCode, 0, renamedList.stderr);
+  assert.strictEqual(
+    JSON.parse(renamedList.stdout).find(
+      (workspace: { workspaceId: string }) => workspace.workspaceId === workspaceId,
+    )?.name,
+    "Auth rework",
+  );
+
+  const reset = await ctx.paseo(["workspace", "rename", workspaceId, "--reset", "--json"]);
+  assert.strictEqual(reset.exitCode, 0, reset.stderr);
+  assert.deepStrictEqual(JSON.parse(reset.stdout), { workspaceId, title: null });
+
+  const resetList = await ctx.paseo(["workspace", "ls", "--json"]);
+  assert.strictEqual(resetList.exitCode, 0, resetList.stderr);
+  assert.strictEqual(
+    JSON.parse(resetList.stdout).find(
+      (workspace: { workspaceId: string }) => workspace.workspaceId === workspaceId,
+    )?.name,
+    basename(ctx.workDir),
+  );
+} finally {
+  await ctx.stop();
+}
+
+console.log("=== Workspace Rename Command Tests Passed ===");