fix: 修复 esc 转义 > 误写为 " + Excel 表头键取全行并集，新增 11 个单测

tests/coverage/src/ai/providers/gemini.ts.html

@@ -197,7 +197,7 @@
 <span class="cline-any cline-yes">3x</span>
 <span class="cline-any cline-yes">3x</span>
 <span class="cline-any cline-yes">2x</span>
-<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">import { AIProvider, ChatOptions, EmptyContentError } from './base';
+<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">import { AIProvider, ChatOptions, EmptyContentError, ApiRequestError } from './base';
 import { t } from '../../i18n/messages';
 &nbsp;
 export class GeminiProvider extends AIProvider {
@@ -235,7 +235,7 @@ export class GeminiProvider extends AIProvider {
 &nbsp;
       if (!response.ok) {
         const errorText = await response.text();
-        throw new Error(`Gemini API 请求失败 (${response.status}): ${errorText}`);
+        throw new ApiRequestError(`Gemini API 请求失败 (${response.status}): ${errorText}`, response.status);
       }
 &nbsp;
       const data = await response.json() as {
@@ -271,7 +271,7 @@ export class GeminiProvider extends AIProvider {
             <div class='footer quiet pad2 space-top1 center small'>
                 Code coverage generated by
                 <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
-                at 2026-08-27T14:48:59.812Z
+                at 2026-09-06T04:25:28.718Z
             </div>
         <script src="../../../prettify.js"></script>
         <script>