fix: remove gemini support since google discontinued it

server/cli.js

@@ -256,13 +256,11 @@ async function updatePackage() {
 const SANDBOX_TEMPLATES = {
     claude: 'docker.io/cloudcliai/sandbox:claude-code',
     codex: 'docker.io/cloudcliai/sandbox:codex',
-    gemini: 'docker.io/cloudcliai/sandbox:gemini',
 };
 
 const SANDBOX_SECRETS = {
     claude: 'anthropic',
     codex: 'openai',
-    gemini: 'google',
 };
 
 function parseSandboxArgs(args) {
@@ -338,7 +336,7 @@ Subcommands:
   ${c.bright('help')}         Show this help
 
 Options:
-  -a, --agent <agent>       Agent to use: claude, codex, gemini (default: claude)
+  -a, --agent <agent>       Agent to use: claude, codex (default: claude)
   -n, --name <name>         Sandbox name (default: derived from workspace folder)
   -t, --template <image>    Custom template image
   -e, --env <KEY=VALUE>     Set environment variable (repeatable)
@@ -359,7 +357,6 @@ Prerequisites:
        sbx login
        sbx secret set -g anthropic   # for Claude
        sbx secret set -g openai      # for Codex
-       sbx secret set -g google      # for Gemini
 
 Advanced usage:
   For branch mode, multiple workspaces, memory limits, network policies,