feat: AI-added records save with placeholders + "Added by AI" provenance

Stop blocking AI imports/proposals on missing non-critical fields. Records
the chat agent drafts now save with safe placeholders, auto-generated file
numbers, and a source="ai" marker that surfaces an "Added by AI" badge so a
clinician can review/edit them later.

Backend:
- add `source` (manual|ai) column to patients/appointments/prescriptions
  (migration 0014) + canonical types, services, validation schemas
- relax patient/appointment validation: empty file number allowed, demographic
  + type/provider/initials fall back to placeholders (initials derived from name)
- patients.generateFileNumber() auto-assigns an MRN when one is missing
- proposeAppointment accepts a name when no file number resolves; AI commits +
  /api/ai/import stamp source="ai"

Frontend:
- `source` on Appointment/Patient/Prescription types; AI commits send source="ai"
- reusable <AiBadge> shown on the Patients table/detail and prescriptions list

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.agents/skills/ai-elements/references/node.md

@@ -0,0 +1,73 @@
+# Node
+
+A composable node component for React Flow-based canvases with Card-based styling.
+
+The `Node` component provides a composable, Card-based node for React Flow canvases. It includes support for connection handles, structured layouts, and consistent styling using shadcn/ui components.
+
+
+
+## Installation
+
+```bash
+npx ai-elements@latest add node
+```
+
+## Features
+
+- Built on shadcn/ui Card components for consistent styling
+- Automatic handle placement (left for target, right for source)
+- Composable sub-components (Header, Title, Description, Action, Content, Footer)
+- Semantic structure for organizing node information
+- Pre-styled sections with borders and backgrounds
+- Responsive sizing with fixed small width
+- Full TypeScript support with proper type definitions
+- Compatible with React Flow's node system
+
+## Props
+
+### `<Node />`
+
+| Prop | Type | Default | Description |
+|------|------|---------|-------------|
+| `handles` | `unknown` | - | Configuration for connection handles. Target renders on the left, source on the right. |
+| `className` | `string` | - | Additional CSS classes to apply to the node. |
+| `...props` | `ComponentProps<typeof Card>` | - | Any other props are spread to the underlying Card component. |
+
+### `<NodeHeader />`
+
+| Prop | Type | Default | Description |
+|------|------|---------|-------------|
+| `className` | `string` | - | Additional CSS classes to apply to the header. |
+| `...props` | `ComponentProps<typeof CardHeader>` | - | Any other props are spread to the underlying CardHeader component. |
+
+### `<NodeTitle />`
+
+| Prop | Type | Default | Description |
+|------|------|---------|-------------|
+| `...props` | `ComponentProps<typeof CardTitle>` | - | Any other props are spread to the underlying CardTitle component. |
+
+### `<NodeDescription />`
+
+| Prop | Type | Default | Description |
+|------|------|---------|-------------|
+| `...props` | `ComponentProps<typeof CardDescription>` | - | Any other props are spread to the underlying CardDescription component. |
+
+### `<NodeAction />`
+
+| Prop | Type | Default | Description |
+|------|------|---------|-------------|
+| `...props` | `ComponentProps<typeof CardAction>` | - | Any other props are spread to the underlying CardAction component. |
+
+### `<NodeContent />`
+
+| Prop | Type | Default | Description |
+|------|------|---------|-------------|
+| `className` | `string` | - | Additional CSS classes to apply to the content. |
+| `...props` | `ComponentProps<typeof CardContent>` | - | Any other props are spread to the underlying CardContent component. |
+
+### `<NodeFooter />`
+
+| Prop | Type | Default | Description |
+|------|------|---------|-------------|
+| `className` | `string` | - | Additional CSS classes to apply to the footer. |
+| `...props` | `ComponentProps<typeof CardFooter>` | - | Any other props are spread to the underlying CardFooter component. |