fix(hooks,test): harden background rewake, fix hook timeout units, stabilize CI teardown

Follow-ups from the PR #175/#176 reviews:

- Rewake helper self-terminates on its own 6h deadline and when orphaned,
  instead of relying on Claude Code to reap the poller
- Rewake marker versioned (V2) with a version-agnostic ownership prefix, so
  future script updates replace older handlers instead of duplicating them;
  regression test covers the V1 to V2 swap
- HOOK_TIMEOUT_MS renamed to HOOK_TIMEOUT_SECONDS = 10: the hook timeout
  field is seconds (the CLI multiplies by 1000), so the curl hooks have
  effectively had a ~2.8h timeout since COD-54
- Test echo PTY switches to raw mode: each input byte echoes exactly once
  (tty line discipline doubled every line and buffered until Enter)
- test/setup.ts: drain in-flight console-log rpc forwards before environment
  teardown (fixes the EnvironmentTeardownError that failed CI twice on the
  merge commit with all 3820 tests passing), clean the temp home on process
  exit (fully-skipped files leaked it), fix the Windows Playwright cache
  fallback path
- test/webview-proxy.test.ts: stop naming the vitest environment directive in
  prose; vitest matches it inside comments and silently ran the whole file
  under the jsdom environment while the comment claimed node
- CLAUDE.md: document the temp-HOME and echo-PTY test isolation

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

test/setup.ts

@@ -25,7 +25,7 @@ if (originalPlaywrightBrowsersPath === undefined && originalHome) {
     process.platform === 'darwin'
       ? join(originalHome, 'Library', 'Caches', 'ms-playwright')
       : process.platform === 'win32'
-        ? join(process.env.LOCALAPPDATA || originalHome, 'ms-playwright')
+        ? join(process.env.LOCALAPPDATA || join(originalHome, 'AppData', 'Local'), 'ms-playwright')
         : join(originalHome, '.cache', 'ms-playwright');
 }
 process.env.HOME = testHome;
@@ -44,7 +44,14 @@ afterEach(() => {
   vi.useRealTimers();
 });
 
-afterAll(() => {
+afterAll(async () => {
+  // Let in-flight console-log rpc forwards drain before the worker environment
+  // tears down. On loaded CI runners the channel otherwise closes while the last
+  // "onUserConsoleLog" call is still pending, and that single unhandled
+  // EnvironmentTeardownError fails the run after every test has passed
+  // (observed twice on the PR #175/#176 merge commit; never locally).
+  await new Promise((resolve) => setTimeout(resolve, 50));
+
   if (originalHome === undefined) delete process.env.HOME;
   else process.env.HOME = originalHome;
 
@@ -59,3 +66,10 @@ afterAll(() => {
 
   rmSync(testHome, { recursive: true, force: true });
 });
+
+// afterAll never fires for a fully-skipped test file (no tests execute), which
+// would leak the temp home created above. The exit hook is the backstop; rmSync
+// with force is a no-op when afterAll already removed it.
+process.on('exit', () => {
+  rmSync(testHome, { recursive: true, force: true });
+});