feat(gemini): add Gemini provider integration (#202)

* feat(gemini): add Gemini provider integration

- Add gemini_config.rs module for .env file parsing
- Extend AppType enum to support Gemini
- Implement GeminiConfigEditor and GeminiFormFields components
- Add GeminiIcon with standardized 1024x1024 viewBox
- Add Gemini provider presets configuration
- Update i18n translations for Gemini support
- Extend ProviderService and McpService for Gemini

* fix(gemini): resolve TypeScript errors, add i18n support, and fix MCP logic

**Critical Fixes:**
- Fix TS2741 errors in tests/msw/state.ts by adding missing Gemini type definitions
- Fix ProviderCard.extractApiUrl to support GOOGLE_GEMINI_BASE_URL display
- Add missing apps.gemini i18n keys (zh/en) for proper app name display
- Fix MCP service Gemini cross-app duplication logic to prevent self-copy

**Technical Details:**
- tests/msw/state.ts: Add gemini default providers, current ID, and MCP config
- ProviderCard.tsx: Check both ANTHROPIC_BASE_URL and GOOGLE_GEMINI_BASE_URL
- services/mcp.rs: Skip Gemini in sync_other_side logic with unreachable!() guards
- Run pnpm format to auto-fix code style issues

**Verification:**
- ✅ pnpm typecheck passes
- ✅ pnpm format completed

* feat(gemini): enhance authentication and config parsing

- Add strict and lenient .env parsing modes
- Implement PackyCode partner authentication detection
- Support Google OAuth official authentication
- Auto-configure security.auth.selectedType for PackyCode
- Add comprehensive test coverage for all auth types
- Update i18n for OAuth hints and Gemini config

---------

Co-authored-by: Jason <farion1231@gmail.com>

src/components/providers/forms/GeminiFormFields.tsx

@@ -0,0 +1,150 @@
+import { useTranslation } from "react-i18next";
+import { FormLabel } from "@/components/ui/form";
+import { Input } from "@/components/ui/input";
+import { Info } from "lucide-react";
+import EndpointSpeedTest from "./EndpointSpeedTest";
+import { ApiKeySection, EndpointField } from "./shared";
+import type { ProviderCategory } from "@/types";
+
+interface EndpointCandidate {
+  url: string;
+}
+
+interface GeminiFormFieldsProps {
+  providerId?: string;
+  // API Key
+  shouldShowApiKey: boolean;
+  apiKey: string;
+  onApiKeyChange: (key: string) => void;
+  category?: ProviderCategory;
+  shouldShowApiKeyLink: boolean;
+  websiteUrl: string;
+  isPartner?: boolean;
+  partnerPromotionKey?: string;
+
+  // Base URL
+  shouldShowSpeedTest: boolean;
+  baseUrl: string;
+  onBaseUrlChange: (url: string) => void;
+  isEndpointModalOpen: boolean;
+  onEndpointModalToggle: (open: boolean) => void;
+  onCustomEndpointsChange: (endpoints: string[]) => void;
+
+  // Model
+  shouldShowModelField: boolean;
+  model: string;
+  onModelChange: (value: string) => void;
+
+  // Speed Test Endpoints
+  speedTestEndpoints: EndpointCandidate[];
+}
+
+export function GeminiFormFields({
+  providerId,
+  shouldShowApiKey,
+  apiKey,
+  onApiKeyChange,
+  category,
+  shouldShowApiKeyLink,
+  websiteUrl,
+  isPartner,
+  partnerPromotionKey,
+  shouldShowSpeedTest,
+  baseUrl,
+  onBaseUrlChange,
+  isEndpointModalOpen,
+  onEndpointModalToggle,
+  onCustomEndpointsChange,
+  shouldShowModelField,
+  model,
+  onModelChange,
+  speedTestEndpoints,
+}: GeminiFormFieldsProps) {
+  const { t } = useTranslation();
+
+  // 检测是否为 Google 官方（使用 OAuth）
+  const isGoogleOfficial =
+    partnerPromotionKey?.toLowerCase() === "google-official";
+
+  return (
+    <>
+      {/* Google OAuth 提示 */}
+      {isGoogleOfficial && (
+        <div className="rounded-lg border border-blue-200 bg-blue-50 p-4 dark:border-blue-800 dark:bg-blue-950">
+          <div className="flex gap-3">
+            <Info className="h-5 w-5 flex-shrink-0 text-blue-600 dark:text-blue-400" />
+            <div className="space-y-1">
+              <p className="text-sm font-medium text-blue-900 dark:text-blue-100">
+                {t("provider.form.gemini.oauthTitle", {
+                  defaultValue: "OAuth 认证模式",
+                })}
+              </p>
+              <p className="text-sm text-blue-700 dark:text-blue-300">
+                {t("provider.form.gemini.oauthHint", {
+                  defaultValue:
+                    "Google 官方使用 OAuth 个人认证，无需填写 API Key。首次使用时会自动打开浏览器进行登录。",
+                })}
+              </p>
+            </div>
+          </div>
+        </div>
+      )}
+
+      {/* API Key 输入框 */}
+      {shouldShowApiKey && !isGoogleOfficial && (
+        <ApiKeySection
+          value={apiKey}
+          onChange={onApiKeyChange}
+          category={category}
+          shouldShowLink={shouldShowApiKeyLink}
+          websiteUrl={websiteUrl}
+          isPartner={isPartner}
+          partnerPromotionKey={partnerPromotionKey}
+        />
+      )}
+
+      {/* Base URL 输入框（统一使用与 Codex 相同的样式与交互） */}
+      {shouldShowSpeedTest && (
+        <EndpointField
+          id="baseUrl"
+          label={t("providerForm.apiEndpoint", { defaultValue: "API 端点" })}
+          value={baseUrl}
+          onChange={onBaseUrlChange}
+          placeholder={t("providerForm.apiEndpointPlaceholder", {
+            defaultValue: "https://your-api-endpoint.com/",
+          })}
+          onManageClick={() => onEndpointModalToggle(true)}
+        />
+      )}
+
+      {/* Model 输入框 */}
+      {shouldShowModelField && (
+        <div>
+          <FormLabel htmlFor="gemini-model">
+            {t("provider.form.gemini.model", { defaultValue: "模型" })}
+          </FormLabel>
+          <Input
+            id="gemini-model"
+            value={model}
+            onChange={(e) => onModelChange(e.target.value)}
+            placeholder="gemini-2.5-pro"
+          />
+        </div>
+      )}
+
+      {/* 端点测速弹窗 */}
+      {shouldShowSpeedTest && isEndpointModalOpen && (
+        <EndpointSpeedTest
+          appId="gemini"
+          providerId={providerId}
+          value={baseUrl}
+          onChange={onBaseUrlChange}
+          initialEndpoints={speedTestEndpoints}
+          visible={isEndpointModalOpen}
+          onClose={() => onEndpointModalToggle(false)}
+          onCustomEndpointsChange={onCustomEndpointsChange}
+        />
+      )}
+    </>
+  );
+}