fix(onboarding): treat already-installed codex as success, update in place (#80816)

When `ensureCodexRuntimePluginForModelSelection` ran for a host that
already had `@openclaw/codex` installed under the managed npm root, the
default `mode: "install"` path in `installPluginFromNpmSpec` returned
"plugin already exists" from `ensureInstallTargetAvailable` and the
wizard marked the step as failed.

Now, when the install record points at a real package on disk, route
through the existing `repairCodexRuntimePluginInstallForModelSelection`
flow (which runs `repairMissingPluginInstallsForIds` →
`updateNpmInstalledPlugins`), forward any changes/warnings to the
runtime log, enable the plugin in cfg, and return `installed`.

A fresh install still flows through `ensureOnboardingPluginInstalled`
so the wizard progress UI is unchanged.

src/commands/codex-runtime-plugin-install.ts

@@ -1,12 +1,29 @@
+import { existsSync } from "node:fs";
+import path from "node:path";
 import { modelSelectionShouldEnsureCodexPlugin } from "../agents/openai-codex-routing.js";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
+import type { PluginInstallRecord } from "../config/types.plugins.js";
+import { enablePluginInConfig } from "../plugins/enable.js";
+import { loadInstalledPluginIndexInstallRecords } from "../plugins/installed-plugin-index-records.js";
 import type { RuntimeEnv } from "../runtime.js";
+import { resolveUserPath } from "../utils.js";
 import type { WizardPrompter } from "../wizard/prompts.js";
 
 const CODEX_RUNTIME_PLUGIN_ID = "codex";
 const CODEX_RUNTIME_PLUGIN_LABEL = "Codex";
 const CODEX_RUNTIME_PLUGIN_NPM_SPEC = "@openclaw/codex";
 
+function isInstalledRecordPresentOnDisk(
+  record: PluginInstallRecord | undefined,
+  env: NodeJS.ProcessEnv,
+): boolean {
+  const installPath = record?.installPath?.trim();
+  if (!installPath) {
+    return false;
+  }
+  return existsSync(path.join(resolveUserPath(installPath, env), "package.json"));
+}
+
 export type CodexRuntimePluginInstallResult = {
   cfg: OpenClawConfig;
   required: boolean;
@@ -34,6 +51,27 @@ export async function ensureCodexRuntimePluginForModelSelection(params: {
   if (!selectedModelShouldEnsureCodexRuntimePlugin({ cfg: params.cfg, model: params.model })) {
     return { cfg: params.cfg, required: false, installed: false };
   }
+  const existingRecords = await loadInstalledPluginIndexInstallRecords({ env: process.env });
+  if (isInstalledRecordPresentOnDisk(existingRecords[CODEX_RUNTIME_PLUGIN_ID], process.env)) {
+    const repair = await repairCodexRuntimePluginInstallForModelSelection({
+      cfg: params.cfg,
+      model: params.model,
+      env: process.env,
+    });
+    for (const change of repair.changes) {
+      params.runtime.log?.(change);
+    }
+    for (const warning of repair.warnings) {
+      params.runtime.log?.(`Codex update warning: ${warning}`);
+    }
+    const enableResult = enablePluginInConfig(params.cfg, CODEX_RUNTIME_PLUGIN_ID);
+    return {
+      cfg: enableResult.enabled ? enableResult.config : params.cfg,
+      required: true,
+      installed: true,
+      status: "installed",
+    };
+  }
   const { ensureOnboardingPluginInstalled } = await import("./onboarding-plugin-install.js");
   const result = await ensureOnboardingPluginInstalled({
     cfg: params.cfg,