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>

ops/src/pages/admin/OrchestratorPage.tsx

@@ -189,16 +189,20 @@ export function OrchestratorPage() {
               color: state.runtime.pageDataValidationGate.enabled ? '#2f6f57' : '#8a5a16',
             }}>
               {state.runtime.pageDataValidationGate.enabled
-                ? '强制通过'
+                ? '强制通过（fail-closed）'
                 : state.runtime.pageDataValidationGate.requested
                   ? '等待 Shadow wiring'
-                  : '仅观察'}
+                  : '仅观察（建议不挡成功）'}
             </p>
           </div>
         </div>
         <p className={state.runtime.reason === 'kill_switch' ? 'alert' : 'warn'} style={{ marginBottom: 0 }}>
           {runtimeMessage}
         </p>
+        <p style={{ margin: '8px 0 0', color: '#68716c', fontSize: 13 }}>
+          本地/开发默认关闭强制闸门（MEMIND_ORCHESTRATOR_PAGE_DATA_VALIDATION_GATE_ENABLED=0），
+          失败时仍会附带纠正建议。生产开启强制审查前需确认 Orchestrator 健康，否则会把本可成功的交付判失败。
+        </p>
       </div>
 
       <div className="card grid">