feat: add AICoding partner provider presets and i18n promotion text

Add AICoding as a partner provider across all five apps (Claude, Codex,
Gemini, OpenClaw, OpenCode) with endpoint, API key URL, and partner
promotion configuration. Add trilingual (zh/en/ja) promotion text for
the first top-up discount.

src/config/opencodeProviderPresets.ts

@@ -1133,7 +1133,35 @@ export const opencodeProviderPresets: OpenCodeProviderPreset[] = [
       },
     },
   },
-
+  {
+    name: "AICoding",
+    websiteUrl: "https://www.aicoding.sh",
+    apiKeyUrl: "https://www.aicoding.sh/i/CCSWITCH",
+    settingsConfig: {
+      npm: "@ai-sdk/anthropic",
+      name: "AICoding",
+      options: {
+        baseURL: "https://api.aicoding.sh",
+        apiKey: "",
+      },
+      models: {
+        "claude-sonnet-4-5-20250929": { name: "Claude Sonnet 4.5" },
+        "claude-opus-4-6": { name: "Claude Opus 4.6" },
+      },
+    },
+    category: "third_party",
+    isPartner: true,
+    partnerPromotionKey: "aicoding",
+    icon: "aicoding",
+    iconColor: "#000000",
+    templateValues: {
+      apiKey: {
+        label: "API Key",
+        placeholder: "",
+        editorValue: "",
+      },
+    },
+  },
   {
     name: "AWS Bedrock",
     websiteUrl: "https://aws.amazon.com/bedrock/",