[codex] Fix message CLI plugin preload failure exit (#76846)

Summary:
- The branch moves configured-channel plugin registry loading for `openclaw message` into `runCommandWithRuntime`, adds regression coverage for preload failure exit handling, and adds a changelog fix entry for #76168.
- Reproducibility: yes. for the exit-path bug: current main calls plugin registry preload before `runCommandWi ...  the high-CPU child process in this read-only review, but the missing exit boundary is source-reproducible.

Automerge notes:
- No ClawSweeper repair was needed after automerge opt-in.

Validation:
- ClawSweeper review passed for head 95b67ea9ba.
- Required merge gates passed before the squash merge.

Prepared head SHA: 95b67ea9ba
Review: https://github.com/openclaw/openclaw/pull/76846#issuecomment-4366747104

Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/cli/program/message/helpers.test.ts

@@ -136,6 +136,20 @@ describe("runMessageAction", () => {
     });
   });
 
+  it("exits with failure when plugin registry loading fails before dispatch", async () => {
+    vi.mocked(ensurePluginRegistryLoaded).mockImplementationOnce(() => {
+      throw new Error("plugin load failed");
+    });
+
+    await runSendAction();
+
+    expect(messageCommandMock).not.toHaveBeenCalled();
+    expect(errorMock).toHaveBeenCalledWith("Error: plugin load failed");
+    expect(exitMock).toHaveBeenCalledOnce();
+    expect(exitMock).toHaveBeenCalledWith(1);
+    expect(exitMock).not.toHaveBeenCalledWith(0);
+  });
+
   it("runs gateway_stop hooks before exit when registered", async () => {
     hasHooksMock.mockReturnValueOnce(true);
     await runSendAction();

src/cli/program/message/helpers.ts

@@ -82,12 +82,12 @@ export function createMessageCliHelpers(
 
   const runMessageAction = async (action: string, opts: Record<string, unknown>) => {
     setVerbose(Boolean(opts.verbose));
-    ensurePluginRegistryLoaded(resolveMessagePluginLoadOptions(opts));
-    const deps = createDefaultDeps();
     let failed = false;
     await runCommandWithRuntime(
       defaultRuntime,
       async () => {
+        ensurePluginRegistryLoaded(resolveMessagePluginLoadOptions(opts));
+        const deps = createDefaultDeps();
         await messageCommand(
           {
             ...normalizeMessageOptions(opts),