feat(api-access): unify DeepSeek model discovery and selection

- require explicit model discovery before saving DeepSeek connections
- preserve selected models when refreshing the catalog
- mark model lists stale when connection details change
- add model refresh support to easy mode
- apply built-in DeepSeek reasoning levels consistently

tests/modelService.test.ts

@@ -0,0 +1,60 @@
+import { describe, expect, it } from 'bun:test';
+import {
+  applyDeepSeekModelPreset,
+  DEEPSEEK_THINKING_LEVELS,
+  mergeModelOptions,
+  reconcileModelSelection,
+} from '../src/services/modelService';
+
+describe('model discovery selection', () => {
+  const discovered = [
+    { name: 'deepseek-chat' },
+    { name: 'deepseek-reasoner' },
+    { name: 'deepseek-new-model' },
+  ];
+
+  it('selects every discovered model on the first fetch for a new connection', () => {
+    expect(Array.from(reconcileModelSelection(discovered, [], [], 'initial'))).toEqual([
+      'deepseek-chat',
+      'deepseek-reasoner',
+      'deepseek-new-model',
+    ]);
+  });
+
+  it('keeps saved selections and leaves newly discovered models unchecked', () => {
+    expect(Array.from(reconcileModelSelection(
+      discovered,
+      [{ name: 'deepseek-chat' }],
+      ['deepseek-chat'],
+      'initial',
+    ))).toEqual(['deepseek-chat']);
+  });
+
+  it('preserves refresh selections, drops unavailable discoveries, and keeps configured models', () => {
+    expect(Array.from(reconcileModelSelection(
+      [{ name: 'deepseek-reasoner' }, { name: 'deepseek-new-model' }],
+      [{ name: 'custom-model' }],
+      ['DEEPSEEK-REASONER', 'removed-model', 'custom-model'],
+      'refresh',
+    ))).toEqual(['deepseek-reasoner', 'custom-model']);
+  });
+
+  it('deduplicates model names case-insensitively and keeps configured metadata', () => {
+    expect(mergeModelOptions(
+      [{ name: 'deepseek-chat' }],
+      [{ name: ' DEEPSEEK-CHAT ', alias: 'Chat' }],
+    )).toEqual([{ name: 'DEEPSEEK-CHAT', alias: 'Chat' }]);
+  });
+});
+
+describe('DeepSeek model preset', () => {
+  it('adds built-in thinking levels while preserving existing metadata', () => {
+    expect(applyDeepSeekModelPreset([{
+      name: 'deepseek-reasoner',
+      thinking: { custom: true, levels: ['legacy'] },
+    }])).toEqual([{
+      name: 'deepseek-reasoner',
+      thinking: { custom: true, levels: [...DEEPSEEK_THINKING_LEVELS] },
+    }]);
+  });
+});

tests/operationFeedback.test.ts

@@ -37,6 +37,21 @@ describe('控件自身反馈', () => {
     expect(nonEmptyCalls[0].arguments[1].getText()).toBe("'error'");
   });
 
+  it('API 接入提示固定在右下角，不插入页面布局', () => {
+    const source = readFileSync(new URL('../src/pages/ApiAccessPage.tsx', import.meta.url), 'utf8');
+    expect(source).toContain("import { createPortal } from 'react-dom';");
+    expect(source).toContain('className="api-access-page-notice"');
+    expect(source).toContain('createPortal(');
+    expect(source).toContain('document.body');
+    expect(source).not.toContain('feedbackRow');
+    expect(source.indexOf('createPortal(')).toBeGreaterThan(source.indexOf('provider-workbench real-provider-workbench'));
+    expect(source.slice(source.indexOf('provider-workbench real-provider-workbench'), source.lastIndexOf('createPortal('))).not.toContain('<InlineNotice');
+    const styles = readFileSync(new URL('../src/styles.css', import.meta.url), 'utf8');
+    expect(styles).toMatch(/\.action-feedback\.inline-notice\.api-access-page-notice\s*\{[\s\S]*?position:\s*fixed;/);
+    expect(styles).toMatch(/\.action-feedback\.inline-notice\.api-access-page-notice\s*\{[\s\S]*?right:\s*24px;/);
+    expect(styles).toMatch(/\.action-feedback\.inline-notice\.api-access-page-notice\s*\{[\s\S]*?bottom:\s*24px;/);
+  });
+
   it('凭证文件的启用停用由按钮与状态标签反馈', () => {
     expect(actionCalls('AuthFileManagementPage.tsx', 'toggleStatus', 'showNotice').calls).toHaveLength(0);
   });

tests/providerConfig.test.ts

@@ -1,6 +1,5 @@
 import { describe, expect, it } from 'bun:test';
 import {
-  allModelSelectionForDiscovery,
   applyProviderRemarkIdentity,
   applyProviderPreset,
   buildProviderRecord,
@@ -51,7 +50,7 @@ describe('API 接入配置合并', () => {
     ]);
   });
 
-  it('DeepSeek 新增预设默认发现全部模型并应用内置思考等级', () => {
+  it('DeepSeek 对选定模型应用内置思考等级', () => {
     expect(DEEPSEEK_THINKING_LEVELS).toEqual(['low', 'high', 'max']);
     const draft = createProviderDraft('deepseek');
     const discovered = [
@@ -387,18 +386,4 @@ describe('API 接入配置合并', () => {
 
     expect(Array.from(selected)).toEqual(['model-a', 'model-b']);
   });
-
-  it('模型选择窗口每次打开都以接口返回的全部模型作为默认选择', () => {
-    const selected = allModelSelectionForDiscovery([
-      { name: 'deepseek-chat' },
-      { name: 'deepseek-reasoner' },
-      { name: 'deepseek-new-model' },
-    ]);
-
-    expect(Array.from(selected)).toEqual([
-      'deepseek-chat',
-      'deepseek-reasoner',
-      'deepseek-new-model',
-    ]);
-  });
 });