fix(opencode): allow model picks when discovery is unavailable (#31985)

* fix(opencode): allow picked models across CLI updates

* test(opencode): prune obsolete timeout ratchet allowance

* fix(opencode): use resolved agents and refuse unsafe workers upfront

* fix(i18n): include OpenCode refusal messages in runtime catalog

src/main/opencode/opencode-model-executable.ts

@@ -0,0 +1,29 @@
+import { resolveStartupShell, tokenizeStartupCommand } from '../../shared/tui-agent-startup-shell'
+import { resolveCommandOnLocalPath } from '../ipc/command-path-resolver'
+
+export async function resolveOpenCodeDirectModelExecutable(options: {
+  command: string | undefined
+  env: NodeJS.ProcessEnv
+  cwd?: string
+  wsl?: { distro?: string }
+}): Promise<string | null> {
+  // WSL needs the same guest account/profile environment as its actual launch.
+  if (options.wsl || !options.cwd) {
+    return null
+  }
+  const parsed = tokenizeStartupCommand(
+    options.command ?? '',
+    resolveStartupShell(process.platform)
+  )
+  if (
+    !parsed.ok ||
+    parsed.tokens.length !== 1 ||
+    parsed.spans.some((span) => span.divergesFromShell)
+  ) {
+    return null
+  }
+  return resolveCommandOnLocalPath(parsed.tokens[0], {
+    env: options.env,
+    cwd: options.cwd
+  })
+}