Fix/openclaude diagnostics settings (#483)

* fix: use openclaude paths in diagnostics and settings

* fix: strip leaked reasoning from assistant output

* fix: preserve legacy claude config compatibility

* fix: tighten path and reasoning compatibility

* fix: buffer streamed reasoning leak preambles

* test: cover openclaude migration and reasoning fixes

* test: isolate execFileNoThrow from cross-file mocks

src/utils/openclaudeUiSurfaces.test.ts

@@ -0,0 +1,65 @@
+import { describe, expect, test } from 'bun:test'
+import { join } from 'path'
+
+import { optionForPermissionSaveDestination } from '../components/permissions/rules/AddPermissionRules.tsx'
+import { isClaudeSettingsPath } from './permissions/filesystem.ts'
+import { getValidationTip } from './settings/validationTips.ts'
+
+describe('OpenClaude settings path surfaces', () => {
+  test('isClaudeSettingsPath recognizes project .openclaude settings files', () => {
+    expect(
+      isClaudeSettingsPath(
+        join(process.cwd(), '.openclaude', 'settings.json'),
+      ),
+    ).toBe(true)
+
+    expect(
+      isClaudeSettingsPath(
+        join(process.cwd(), '.openclaude', 'settings.local.json'),
+      ),
+    ).toBe(true)
+  })
+
+  test('permission save destinations point user settings to ~/.openclaude', () => {
+    expect(optionForPermissionSaveDestination('userSettings')).toEqual({
+      label: 'User settings',
+      description: 'Saved in ~/.openclaude/settings.json',
+      value: 'userSettings',
+    })
+  })
+
+  test('permission save destinations point project settings to .openclaude', () => {
+    expect(optionForPermissionSaveDestination('projectSettings')).toEqual({
+      label: 'Project settings',
+      description: 'Checked in at .openclaude/settings.json',
+      value: 'projectSettings',
+    })
+
+    expect(optionForPermissionSaveDestination('localSettings')).toEqual({
+      label: 'Project settings (local)',
+      description: 'Saved in .openclaude/settings.local.json',
+      value: 'localSettings',
+    })
+  })
+})
+
+describe('OpenClaude validation tips', () => {
+  test('permissions.defaultMode invalid value keeps suggestion but no Claude docs link', () => {
+    const tip = getValidationTip({
+      path: 'permissions.defaultMode',
+      code: 'invalid_value',
+      enumValues: [
+        'acceptEdits',
+        'bypassPermissions',
+        'default',
+        'dontAsk',
+        'plan',
+      ],
+    })
+
+    expect(tip).toEqual({
+      suggestion:
+        'Valid modes: "acceptEdits" (ask before file changes), "plan" (analysis only), "bypassPermissions" (auto-accept all), or "default" (standard behavior)',
+    })
+  })
+})