feat: Script Generator Phase 1+2 — backend, engine, API, frontend, template editor, parameter detector

Complete Script Generator feature including:

Backend:
- ScriptCategory, ScriptTemplate, ScriptGeneration models
- ScriptTemplateEngine with substitution, filters, sanitization
- CRUD + share API endpoints with permission checks
- Integration tests for permissions and sharing
- Migration 057 with AD User Management seed templates

Frontend — Script Library:
- Browse templates with category tabs and search
- Configure pane with parameter form and script generation
- Script preview with live substitution and copy/download
- scriptGeneratorStore Zustand store

Frontend — Template Editor:
- Full CRUD form with metadata, script body (Monaco Editor), parameters
- ParameterSchemaBuilder with visual builder + JSON toggle
- ScriptManagePage with routing and nav link

Frontend — Parameter Detector:
- Client-side PowerShell parameter detection engine
- Detects script-level param() blocks and variable assignments
- Type inference from PS type annotations and value patterns
- ParameterDetectorStepper one-by-one review UI with accept/skip

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/router.tsx

@@ -41,6 +41,8 @@ const TeamAnalyticsPage = lazy(() => import('@/pages/TeamAnalyticsPage'))
 const MyAnalyticsPage = lazy(() => import('@/pages/MyAnalyticsPage'))
 const FeedbackPage = lazy(() => import('@/pages/FeedbackPage'))
 const StepLibraryPage = lazy(() => import('@/pages/StepLibraryPage'))
+const ScriptLibraryPage = lazy(() => import('@/pages/ScriptLibraryPage'))
+const ScriptManagePage = lazy(() => import('@/pages/ScriptManagePage'))
 const AssistantChatPage = lazy(() => import('@/pages/AssistantChatPage'))
 const KBAcceleratorPage = lazy(() => import('@/pages/KBAcceleratorPage'))
 const GuidesHubPage = lazy(() => import('@/pages/GuidesHubPage'))
@@ -160,6 +162,8 @@ export const router = sentryCreateBrowserRouter([
       { path: 'analytics/me', element: page(MyAnalyticsPage) },
       { path: 'feedback', element: page(FeedbackPage) },
       { path: 'step-library', element: page(StepLibraryPage) },
+      { path: 'scripts', element: page(ScriptLibraryPage) },
+      { path: 'scripts/manage', element: page(ScriptManagePage) },
       { path: 'kb-accelerator', element: page(KBAcceleratorPage) },
       { path: 'assistant', element: page(AssistantChatPage) },
       { path: 'guides', element: page(GuidesHubPage) },