feat: add Gemini API key onboarding

src/commands/configure.ts

@@ -55,6 +55,7 @@ import {
   applyAuthProfileConfig,
   applyMinimaxConfig,
   setAnthropicApiKey,
+  setGeminiApiKey,
   writeOAuthCredentials,
 } from "./onboard-auth.js";
 import {
@@ -300,6 +301,7 @@ async function promptAuthConfig(
     | "openai-codex"
     | "codex-cli"
     | "antigravity"
+    | "gemini-api-key"
     | "apiKey"
     | "minimax"
     | "skip";
@@ -513,6 +515,20 @@ async function promptAuthConfig(
       runtime.error(String(err));
       note("Trouble with OAuth? See https://docs.clawd.bot/start/faq", "OAuth");
     }
+  } else if (authChoice === "gemini-api-key") {
+    const key = guardCancel(
+      await text({
+        message: "Enter Gemini API key",
+        validate: (value) => (value?.trim() ? undefined : "Required"),
+      }),
+      runtime,
+    );
+    await setGeminiApiKey(String(key).trim());
+    next = applyAuthProfileConfig(next, {
+      profileId: "google:default",
+      provider: "google",
+      mode: "api_key",
+    });
   } else if (authChoice === "apiKey") {
     const key = guardCancel(
       await text({