feat(sponsor): add PackyCode as official partner

- Add PackyCode to sponsor section in README (both EN/ZH)
- Add PackyCode logo to assets/partners/logos/
- Mark PackyCode as partner in provider presets (Claude & Codex)
- Add promotion message to i18n files with 10% discount info

src/config/claudeProviderPresets.ts

@@ -248,7 +248,7 @@ export const providerPresets: ProviderPreset[] = [
   {
     name: "PackyCode",
     websiteUrl: "https://www.packyapi.com",
-    apiKeyUrl: "https://www.packyapi.com",
+    apiKeyUrl: "https://www.packyapi.com/register?aff=cc-switch",
     settingsConfig: {
       env: {
         ANTHROPIC_BASE_URL: "https://www.packyapi.com",
@@ -261,6 +261,8 @@ export const providerPresets: ProviderPreset[] = [
       "https://api-slb.packyapi.com",
     ],
     category: "third_party",
+    isPartner: true, // 合作伙伴
+    partnerPromotionKey: "packycode", // 促销信息 i18n key
   },
   {
     name: "AnyRouter",

src/config/codexProviderPresets.ts

@@ -128,6 +128,7 @@ requires_openai_auth = true`,
   {
     name: "PackyCode",
     websiteUrl: "https://www.packyapi.com",
+    apiKeyUrl: "https://www.packyapi.com/register?aff=cc-switch",
     category: "third_party",
     auth: generateThirdPartyAuth(""),
     config: generateThirdPartyConfig(
@@ -139,6 +140,8 @@ requires_openai_auth = true`,
       "https://www.packyapi.com/v1",
       "https://api-slb.packyapi.com/v1",
     ],
+    isPartner: true, // 合作伙伴
+    partnerPromotionKey: "packycode", // 促销信息 i18n key
   },
   {
     name: "AnyRouter",

src/i18n/locales/en.json

@@ -241,7 +241,8 @@
     "officialHint": "💡 Official provider uses browser login, no API Key needed",
     "getApiKey": "Get API Key",
     "partnerPromotion": {
-      "zhipu": "Zhipu GLM is an official partner of CC Switch. Use this link to top up and get a 10% discount"
+      "zhipu": "Zhipu GLM is an official partner of CC Switch. Use this link to top up and get a 10% discount",
+      "packycode": "PackyCode is an official partner of CC Switch. Register using this link and enter \"cc-switch\" promo code during recharge to get 10% off"
     },
     "parameterConfig": "Parameter Config - {{name}} *",
     "mainModel": "Main Model (optional)",

src/i18n/locales/zh.json

@@ -241,7 +241,8 @@
     "officialHint": "💡 官方供应商使用浏览器登录，无需配置 API Key",
     "getApiKey": "获取 API Key",
     "partnerPromotion": {
-      "zhipu": "智谱 GLM 是 CC Switch 的官方合作伙伴，使用此链接充值可以获得9折优惠"
+      "zhipu": "智谱 GLM 是 CC Switch 的官方合作伙伴，使用此链接充值可以获得9折优惠",
+      "packycode": "PackyCode 是 CC Switch 的官方合作伙伴，使用此链接注册并在充值时填写 \"cc-switch\" 优惠码，可以享受9折优惠"
     },
     "parameterConfig": "参数配置 - {{name}} *",
     "mainModel": "主模型 (可选)",