feat(onboarding): wire plugin-backed auth choices

src/commands/auth-choice-options.ts

@@ -13,6 +13,7 @@ export type AuthChoiceGroupId =
   | "openai"
   | "anthropic"
   | "google"
+  | "copilot"
   | "openrouter"
   | "ai-gateway"
   | "moonshot"
@@ -68,8 +69,14 @@ const AUTH_CHOICE_GROUP_DEFS: {
   {
     value: "google",
     label: "Google",
-    hint: "Gemini API key",
-    choices: ["gemini-api-key"],
+    hint: "Gemini API key + OAuth",
+    choices: ["gemini-api-key", "google-antigravity", "google-gemini-cli"],
+  },
+  {
+    value: "copilot",
+    label: "Copilot",
+    hint: "GitHub + local proxy",
+    choices: ["github-copilot", "copilot-proxy"],
   },
   {
     value: "openrouter",
@@ -195,8 +202,23 @@ export function buildAuthChoiceOptions(params: {
     hint: "Uses GitHub device flow",
   });
   options.push({ value: "gemini-api-key", label: "Google Gemini API key" });
+  options.push({
+    value: "google-antigravity",
+    label: "Google Antigravity OAuth",
+    hint: "Uses the bundled Antigravity auth plugin",
+  });
+  options.push({
+    value: "google-gemini-cli",
+    label: "Google Gemini CLI OAuth",
+    hint: "Uses the bundled Gemini CLI auth plugin",
+  });
   options.push({ value: "zai-api-key", label: "Z.AI (GLM 4.7) API key" });
   options.push({ value: "qwen-portal", label: "Qwen OAuth" });
+  options.push({
+    value: "copilot-proxy",
+    label: "Copilot Proxy (local)",
+    hint: "Local proxy for VS Code Copilot models",
+  });
   options.push({ value: "apiKey", label: "Anthropic API key" });
   // Token flow is currently Anthropic-only; use CLI for advanced providers.
   options.push({