feat(presets): add LemonData provider across all six apps

Register LemonData (third-party partner) preset for Claude, Codex,
Gemini, OpenCode, OpenClaw, and Hermes, plus icon assets and i18n
partner promotion copy (zh/en/ja). Claude preset uses
ANTHROPIC_API_KEY auth; OpenAI-compatible apps target gpt-5.4.

src/config/opencodeProviderPresets.ts

@@ -1418,6 +1418,34 @@ export const opencodeProviderPresets: OpenCodeProviderPreset[] = [
       },
     },
   },
+  {
+    name: "LemonData",
+    websiteUrl: "https://lemondata.cc",
+    apiKeyUrl: "https://lemondata.cc/r/FFX1ZDUP",
+    settingsConfig: {
+      npm: "@ai-sdk/openai-compatible",
+      name: "LemonData",
+      options: {
+        baseURL: "https://api.lemondata.cc/v1",
+        apiKey: "",
+        setCacheKey: true,
+      },
+      models: {
+        "gpt-5.4": { name: "GPT-5.4" },
+      },
+    },
+    category: "third_party",
+    isPartner: true,
+    partnerPromotionKey: "lemondata",
+    icon: "lemondata",
+    templateValues: {
+      apiKey: {
+        label: "API Key",
+        placeholder: "",
+        editorValue: "",
+      },
+    },
+  },
   {
     name: "AWS Bedrock",
     websiteUrl: "https://aws.amazon.com/bedrock/",