fix: harden and de-slop the merged contribution batch

Follow-ups promised on merge, plus review findings on the batch itself:

- chat: task-tool output now respects the 512KiB render cap; quick-open
  icon is visible at rest on coarse pointers and reachable by keyboard
  (row keydown no longer swallows inner-button Enter/Space); composer
  inline-code decoration drops the metric-shifting padding; a btw fork
  send carries only the boundary instruction, never the promotion notice
- sync: cascade revert/unrevert aborts busy descendants, busy state is
  read from every child store at the moment of use; rule 9 documents
  redo clearing all descendant revert markers
- electron: renderer recovery keeps memory-eviction (a valid
  render-process-gone reason) and both windows share one
  attachRendererRecovery helper
- vscode: process registry is a thin re-export of the web module
  (provider-env-aliases precedent) with ordered register/unregister
  writes and an awaited close
- server/cli: managed-process registry takes injectable deps (fixes the
  unreaped-orphans ReferenceError), corrupt settings errors name the
  file, getWorktrees test restores console.warn
- tests: module-mock harnesses removed (AgentsSidebar, SettingsView
  mobile focus — behaviors stay live but uncovered, accepted trade),
  QuestionMarkdown asserts rendered DOM
- i18n: German gains the debug-panel request keys, Japanese/German drop
  removed worktree keys, Ukrainian unit spacing fixed
- changelog: Copilot AI Credits entries (main + VS Code)

packages/ui/src/components/chat/QuestionMarkdown.test.tsx

@@ -1,25 +1,35 @@
 import { describe, expect, test } from 'bun:test';
+import { renderToStaticMarkup } from 'react-dom/server';
 
-import { SimpleMarkdownRenderer } from './MarkdownRenderer';
 import { QuestionMarkdown } from './QuestionMarkdown';
 
+// The markdown renderer is lazy, so a synchronous server render always emits the
+// Suspense fallback QuestionMarkdown supplies. That fallback is the surface that
+// has to keep the exact question text and the question typography classes.
 describe('QuestionMarkdown', () => {
-  test('delegates exact content to the tool markdown renderer', () => {
+  test('renders the question content verbatim', () => {
     const content = 'Choose **one** from `mode`: [details](https://example.com)';
-    const element = QuestionMarkdown({ content, size: 'meta' });
 
-    expect(element.type).toBe(SimpleMarkdownRenderer);
-    expect(element.props.content).toBe(content);
-    expect(element.props.variant).toBe('tool');
-    expect(element.props.fallbackContent.props.children).toBe(content);
-    expect(element.props.fallbackContent.props.className).toContain('whitespace-pre-wrap');
+    const html = renderToStaticMarkup(<QuestionMarkdown content={content} size="meta" />);
+
+    expect(html).toBe(
+      `<div class="question-markdown typography-meta whitespace-pre-wrap">${content}</div>`,
+    );
   });
 
-  test('preserves question typography size and caller classes', () => {
-    const meta = QuestionMarkdown({ content: 'Meta', size: 'meta', className: 'font-medium text-foreground' });
-    const micro = QuestionMarkdown({ content: 'Micro', size: 'micro', className: 'text-muted-foreground' });
+  test('applies meta typography and caller classes', () => {
+    const html = renderToStaticMarkup(
+      <QuestionMarkdown content="Meta" size="meta" className="font-medium text-foreground" />,
+    );
 
-    expect(meta.props.className).toBe('question-markdown typography-meta font-medium text-foreground');
-    expect(micro.props.className).toBe('question-markdown typography-micro text-muted-foreground');
+    expect(html).toContain('class="question-markdown typography-meta font-medium text-foreground whitespace-pre-wrap"');
+  });
+
+  test('applies micro typography and caller classes', () => {
+    const html = renderToStaticMarkup(
+      <QuestionMarkdown content="Micro" size="micro" className="text-muted-foreground" />,
+    );
+
+    expect(html).toContain('class="question-markdown typography-micro text-muted-foreground whitespace-pre-wrap"');
   });
 });