fix: native upgrade staged message, v2 harness default, moon spinner

Native installs report staged-for-next-start copy. runShell uses the v2
harness unless the legacy flag is set. MoonLoader uses moon frames when
style is moon so AgentDynamicWorkflow can host the moon spinner.

Author: elkaix

apps/pythinker-code/src/cli/run-shell.ts

@@ -3,6 +3,7 @@ import { homedir } from 'node:os';
 
 import {
   createPythinkerHarness,
+  createPythinkerHarnessV2,
   flushDiagnosticLogsSync,
   log,
   type PythinkerHarness,
@@ -83,7 +84,12 @@ export async function runShell(
     },
     sessionStartedProperties: { yolo: opts.yolo, auto: opts.auto, plan: opts.plan, afk: false },
   };
-  const harness = createPythinkerHarness(harnessOptions);
+  const useLegacy =
+    process.env['PYTHINKER_CODE_LEGACY_FLAG'] === '1' ||
+    process.env['PYTHINKER_CODE_LEGACY_FLAG'] === 'true';
+  const harness = useLegacy
+    ? createPythinkerHarness(harnessOptions)
+    : createPythinkerHarnessV2(harnessOptions);
   startupTrace('harness:created');
   log.info('pythinker-code starting', {
     version,

apps/pythinker-code/src/cli/sub/upgrade.ts

@@ -153,7 +153,7 @@ export async function handleUpgrade(
       targetVersion: target.version,
       source,
     });
-    deps.stdout.write(renderInstallSuccessMessage(target));
+    deps.stdout.write(renderInstallSuccessMessage(target, source));
     return 0;
   } catch (error) {
     trackUpgradeEvent(deps.track, 'upgrade_command_failed', {

apps/pythinker-code/src/cli/update/preflight.ts

@@ -221,7 +221,13 @@ export function renderManualUpdateMessage(
   );
 }
 
-export function renderInstallSuccessMessage(target: UpdateTarget): string {
+export function renderInstallSuccessMessage(
+  target: UpdateTarget,
+  source?: string,
+): string {
+  if (source === 'native') {
+    return `Pythinker Code ${target.version} is staged; it applies the next time you start the CLI.\n`;
+  }
   return `Updated ${NPM_PACKAGE_NAME} to ${target.version}. Restart the CLI to use the new version.\n`;
 }
 

apps/pythinker-code/src/tui/components/chrome/moon-loader.ts

@@ -4,6 +4,8 @@ import type { TUI } from '@pymodel/pi-tui';
 import {
   BRAILLE_SPINNER_FRAMES,
   BRAILLE_SPINNER_INTERVAL_MS,
+  MOON_SPINNER_FRAMES,
+  MOON_SPINNER_INTERVAL_MS,
   formatThinkingSpinnerLabel,
 } from '#/tui/constant/rendering';
 import { currentTheme } from '#/tui/theme';
@@ -43,8 +45,8 @@ export class MoonLoader extends Text {
   ) {
     super('', 1, 0);
     this.ui = ui;
-    this.frames = [...BRAILLE_SPINNER_FRAMES];
-    this.interval = BRAILLE_SPINNER_INTERVAL_MS;
+    this.frames = style === 'moon' ? [...MOON_SPINNER_FRAMES] : [...BRAILLE_SPINNER_FRAMES];
+    this.interval = style === 'moon' ? MOON_SPINNER_INTERVAL_MS : BRAILLE_SPINNER_INTERVAL_MS;
     this.colorFn = colorFn;
     this.useVerbLabels = options?.verbLabels ?? false;
     this.label = this.useVerbLabels ? formatThinkingSpinnerLabel() : label;