Route OpenCode live tests through OpenRouter

Big Pickle's models.dev metadata changed upstream to route via the
Anthropic SDK against the Zen OpenAI-compatible endpoint, which the
endpoint rejects. Swap the live-turn smoke tests to
openrouter/~openai/gpt-mini-latest and gate them on OPENROUTER_API_KEY
so fork PRs skip cleanly when the secret is absent. Also unpin
opencode-ai so CI tracks the latest CLI.

packages/server/src/server/agent/providers/opencode-agent.test.ts

@@ -34,7 +34,7 @@ function tmpCwd(): string {
   }
 }
 
-const TEST_MODEL = "opencode/big-pickle";
+const TEST_MODEL = "openrouter/~openai/gpt-mini-latest";
 
 interface TurnResult {
   events: AgentStreamEvent[];
@@ -92,10 +92,10 @@ function isBinaryInstalled(binary: string): boolean {
 }
 
 const hasOpenCode = isBinaryInstalled("opencode");
-const shouldRunOpenCodeSmokeTests =
-  process.env.PASEO_RUN_OPENCODE_SMOKE_TESTS === "1" && hasOpenCode;
+const hasOpenRouterKey = Boolean(process.env.OPENROUTER_API_KEY);
+const canRunLiveOpenCodeTurns = hasOpenCode && hasOpenRouterKey;
 
-(shouldRunOpenCodeSmokeTests ? describe : describe.skip)("OpenCodeAgentClient smoke tests", () => {
+(canRunLiveOpenCodeTurns ? describe : describe.skip)("OpenCodeAgentClient smoke tests", () => {
   const logger = createTestLogger();
   const buildConfig = (cwd: string): AgentSessionConfig => ({
     provider: "opencode",