chore(partners): remove DDSHub partner integration

Remove DDSHub from all provider presets (Claude, Claude Desktop, Codex, Hermes),
i18n files (zh/en/ja), README docs, and icon system. Physical assets retained for
potential future restoration.

src/config/codexProviderPresets.ts

@@ -383,23 +383,6 @@ requires_openai_auth = true`,
     partnerPromotionKey: "lionccapi",
     icon: "lioncc",
   },
-  {
-    name: "DDSHub",
-    websiteUrl: "https://www.ddshub.cc",
-    apiKeyUrl: "https://ddshub.short.gy/ccswitch",
-    category: "third_party",
-    auth: generateThirdPartyAuth(""),
-    config: generateThirdPartyConfig(
-      "ddshub",
-      "https://www.ddshub.cc",
-      "gpt-5.4",
-    ),
-    endpointCandidates: ["https://www.ddshub.cc"],
-    isPartner: true,
-    partnerPromotionKey: "ddshub",
-    icon: "dds",
-    iconColor: "#000000",
-  },
   {
     name: "E-FlowCode",
     websiteUrl: "https://e-flowcode.cc",