feat: WidgetDemo baseline scripts and widget analysis

MDL baseline scripts for reproducible WidgetDemo module generation:
- 01-domain-model.mdl: 3 enums, 2 entities, 1 association
- 01b-snippet.mdl: ButtonShowcase snippet
- 02-showcase-page.mdl: 95-widget showcase (62 native, 33 pluggable)
- 03-seed-and-navigate.mdl: seed data microflow + navigation

WIDGET_ANALYSIS.md: classification of all 95 widgets by type.

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

Author: 2 people

mdl-examples/widgetdemo/01-domain-model.mdl

@@ -0,0 +1,53 @@
+-- WidgetDemo: self-contained domain model (no external dependencies)
+-- Provides entities and enumerations for the widget showcase page.
+
+CREATE ENUMERATION WidgetDemo.ENUM_Priority (
+  LOW 'Low',
+  MEDIUM 'Medium',
+  HIGH 'High',
+  CRITICAL 'Critical'
+);
+
+CREATE ENUMERATION WidgetDemo.ENUM_Status (
+  DRAFT 'Draft',
+  ACTIVE 'Active',
+  COMPLETED 'Completed',
+  ARCHIVED 'Archived'
+);
+
+CREATE ENUMERATION WidgetDemo.ENUM_Category (
+  GENERAL 'General',
+  INPUT 'Input',
+  DISPLAY 'Display',
+  STRUCTURE 'Structure',
+  DATA_DISPLAY 'Data Display'
+);
+
+CREATE PERSISTENT ENTITY WidgetDemo.DemoItem (
+  Title: String(unlimited) NOT NULL,
+  Description: String(unlimited),
+  Code: String(unlimited),
+  Category: Enumeration(WidgetDemo.ENUM_Category) DEFAULT WidgetDemo.ENUM_Category.GENERAL,
+  Priority: Enumeration(WidgetDemo.ENUM_Priority) DEFAULT WidgetDemo.ENUM_Priority.MEDIUM,
+  ItemStatus: Enumeration(WidgetDemo.ENUM_Status) DEFAULT WidgetDemo.ENUM_Status.DRAFT,
+  IsActive: Boolean DEFAULT true,
+  Score: Integer DEFAULT 0,
+  Amount: Decimal DEFAULT 0,
+  DateCreated: DateTime,
+  DueDate: DateTime,
+  Progress: Decimal DEFAULT 0,
+  Rating: Integer DEFAULT 3,
+  Notes: String(unlimited),
+  ImageUrl: String(unlimited)
+);
+
+CREATE NON-PERSISTENT ENTITY WidgetDemo.Helper (
+  Attribute: Enumeration(WidgetDemo.ENUM_Category) DEFAULT WidgetDemo.ENUM_Category.GENERAL
+);
+
+CREATE ASSOCIATION WidgetDemo.Helper_DemoItem (
+  FROM WidgetDemo.Helper TO WidgetDemo.DemoItem,
+  Type: ReferenceSet
+);
+
+GRANT WidgetDemo.User ON WidgetDemo.DemoItem (CREATE, DELETE, READ *, WRITE *);

mdl-examples/widgetdemo/01b-snippet.mdl

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+-- WidgetDemo: Button showcase snippet (referenced by 02-showcase-page)
+
+CREATE SNIPPET WidgetDemo.SNIPPET_ButtonShowcase {
+  ACTIONBUTTON btnInfo (Caption: 'Info Button', Action: CLOSE_PAGE, ButtonStyle: Info)
+  ACTIONBUTTON btnLink (Caption: 'Link Button', Action: CLOSE_PAGE, ButtonStyle: Link)
+}