feat(page-data): add validation suggestions, repair path, and thinking fixes

Map Page Data failure codes to Chinese remediation hints, trigger one-shot
goosed repair for remediable cases, and recover poisoned thinking sessions.
Route local DeepSeek through the no-think proxy via host.docker.internal so
tool rounds no longer hit reasoning_content 400; document gate and case-study
scenarios for event registration repair.

Co-authored-by: Cursor <cursoragent@cursor.com>

deepseek-no-think-proxy.test.mjs

@@ -22,13 +22,13 @@ test('injectDeepseekThinkingDisabled adds thinking.disabled when absent', () =>
   assert.equal(body.model, 'deepseek-v4-flash');
 });
 
-test('injectDeepseekThinkingDisabled preserves explicit thinking config', () => {
+test('injectDeepseekThinkingDisabled overrides enabled thinking config', () => {
   const { body, injected } = injectDeepseekThinkingDisabled({
     model: 'deepseek-v4-pro',
     thinking: { type: 'enabled' },
   });
-  assert.equal(injected, false);
-  assert.deepEqual(body.thinking, { type: 'enabled' });
+  assert.equal(injected, true);
+  assert.deepEqual(body.thinking, { type: 'disabled' });
 });
 
 test('deepseekDisableThinkingEnabled defaults on for local runtime profile', () => {
@@ -67,7 +67,7 @@ test('moonshotToolSchemaCompatEnabled defaults on for local runtime profiles', (
 test('resolveDeepseekNoThinkProxyBaseUrl uses host gateway defaults', () => {
   assert.equal(
     resolveDeepseekNoThinkProxyBaseUrl({}),
-    'http://host.lima.internal:18036/v1',
+    'http://host.docker.internal:18036/v1',
   );
   assert.equal(
     resolveDeepseekNoThinkProxyBaseUrl({
@@ -83,7 +83,7 @@ test('Moonshot compat routing recognizes official endpoints and uses a distinct
   assert.equal(isMoonshotApiUrl('https://api.deepseek.com/v1'), false);
   assert.equal(
     resolveMoonshotCompatProxyBaseUrl({}),
-    'http://host.lima.internal:18036/moonshot/v1',
+    'http://host.docker.internal:18036/moonshot/v1',
   );
 });