feat(FN-3227): add startup model sync for opencode-go commands

- Add shared startup model sync helper and integrate it into dashboard, serve, and daemon command startup flows
- Introduce opencode-go model sync setting in core schema/types and expose it in dashboard settings UI
- Add CLI regression tests covering startup model sync behavior and command wiring
- Document the new startup model sync setting and related CLI behavior updates

Fusion-Task-Id: FN-3227

packages/cli/src/commands/daemon.ts

@@ -64,6 +64,7 @@ import { createReadOnlyAuthFileStorage, mergeAuthStorageReads, wrapAuthStorageWi
 import { getCodexCliAuthPath, getFusionAuthPath, getLegacyAuthPaths, getModelRegistryModelsPath, getPackageManagerAgentDir } from "./auth-paths.js";
 import { resolveProject } from "../project-context.js";
 import { ensureBundledDependencyGraphPluginInstalled } from "../plugins/bundled-plugin-install.js";
+import { syncStartupModels } from "./startup-model-sync.js";
 
 const DIAGNOSTIC_INTERVAL_MS = 30 * 60 * 1000; // 30 minutes
 let daemonStartTime = 0;
@@ -548,6 +549,13 @@ export async function runDaemon(opts: DaemonOptions = {}) {
     modelRegistry.refresh();
   }
 
+  void syncStartupModels({
+    getSettings: () => store.getSettings(),
+    authStorage: dashboardAuthStorage,
+    modelRegistry,
+    log: (scope, message) => console.log(`[${scope}] ${message}`),
+  });
+
   // ── Skills adapter for skills discovery and execution toggling ─────────────
   const skillsAdapter = packageManager
     ? createSkillsAdapter({