refactor: migrate to monorepo structure with Docker, PocketBase, and e2e tests

- Reorganize into apps/, packages/, docs/, e2e/, pocketbase/ directories
- Add Dockerfiles for web, worker, and PocketBase services
- Add docker-compose.yml for local orchestration
- Add turbo.json for monorepo task management
- Add Playwright e2e test infrastructure
- Add PocketBase backend with migrations
- Remove Vite/Next.js/ESLint/PostCSS config files
- Update package.json with workspace dependencies
- Add .env.example and .dockerignore

packages/shared/src/schemas/canvas.ts

@@ -0,0 +1,81 @@
+import { z } from 'zod';
+
+// ── Enums ────────────────────────────────────────────────────────────────────
+
+export const canvasModeEnum = z.enum(['freeform', 'graph']);
+export const canvasCardTypeEnum = z.enum(['note', 'task', 'image', 'entity']);
+
+// ── Sub-schemas ──────────────────────────────────────────────────────────────
+
+export const canvasCardSchema = z.object({
+  id: z.string(),
+  canvas_id: z.string(),
+  type: canvasCardTypeEnum,
+  entity_id: z.string().optional(),
+  title: z.string().optional(),
+  content: z.string().optional(),
+  x: z.number().default(0),
+  y: z.number().default(0),
+  width: z.number().positive().default(200),
+  height: z.number().positive().default(150),
+  rotation: z.number().default(0),
+  color: z.string().optional(),
+  z_index: z.number().int().default(0),
+  created: z.string().datetime(),
+  updated: z.string().datetime(),
+});
+
+export const createCanvasCardSchema = canvasCardSchema.omit({
+  id: true,
+  created: true,
+  updated: true,
+});
+
+export const updateCanvasCardSchema = createCanvasCardSchema.partial();
+
+// ── Canvas Schema ────────────────────────────────────────────────────────────
+
+export const canvasSchema = z.object({
+  id: z.string(),
+  name: z.string().min(1, 'Canvas name is required'),
+  description: z.string().optional(),
+  mode: canvasModeEnum.default('freeform'),
+  domain: z.string(),
+  tags: z.array(z.string()).default([]),
+  cards: z.array(canvasCardSchema).default([]),
+  connections: z.array(z.object({
+    id: z.string(),
+    source_card_id: z.string(),
+    target_card_id: z.string(),
+    label: z.string().optional(),
+    style: z.enum(['solid', 'dashed', 'dotted']).default('solid'),
+  })).default([]),
+  viewport: z.object({
+    x: z.number().default(0),
+    y: z.number().default(0),
+    zoom: z.number().positive().default(1),
+  }).optional(),
+  background: z.string().optional(),
+  custom_fields: z.record(z.unknown()).optional(),
+  created: z.string().datetime(),
+  updated: z.string().datetime(),
+});
+
+export const createCanvasSchema = canvasSchema.omit({
+  id: true,
+  cards: true,
+  connections: true,
+  created: true,
+  updated: true,
+});
+
+export const updateCanvasSchema = createCanvasSchema.partial();
+
+// ── Types ────────────────────────────────────────────────────────────────────
+
+export type Canvas = z.infer<typeof canvasSchema>;
+export type CreateCanvas = z.infer<typeof createCanvasSchema>;
+export type UpdateCanvas = z.infer<typeof updateCanvasSchema>;
+export type CanvasCard = z.infer<typeof canvasCardSchema>;
+export type CreateCanvasCard = z.infer<typeof createCanvasCardSchema>;
+export type UpdateCanvasCard = z.infer<typeof updateCanvasCardSchema>;