Phase 4: Rich card features — labels, checklists, comments, attachments, categories

Add full CRUD + UI for all card sub-resources (tags/labels, assignees, checklists
with items, comments with markdown, file attachments). Restructure CardModal into
a two-column layout with lazy-loaded data. Upgrade card thumbnails with named label
pills, urgency-colored due date badges, checklist progress indicators, and SVG icons.
Add board categories with filtering on the listing page. Include markdown rendering
with DOMPurify sanitization and .prose CSS styles.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package-lock.json

@@ -1,18 +1,20 @@
 {
-	"name": "kanban",
+	"name": "pounce",
 	"version": "0.1.0",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
-			"name": "kanban",
+			"name": "pounce",
 			"version": "0.1.0",
 			"dependencies": {
 				"@prisma/client": "^6.6.0",
 				"@sveltejs/adapter-node": "^5.2.0",
 				"@sveltejs/kit": "^2.50.2",
+				"@types/dompurify": "^3.0.5",
 				"bcrypt": "^6.0.0",
 				"date-fns": "^4.1.0",
+				"dompurify": "^3.3.1",
 				"express": "^5.1.0",
 				"marked": "^15.0.0",
 				"socket.io": "^4.8.0",
@@ -1438,6 +1440,15 @@
 				"@types/node": "*"
 			}
 		},
+		"node_modules/@types/dompurify": {
+			"version": "3.0.5",
+			"resolved": "https://registry.npmjs.org/@types/dompurify/-/dompurify-3.0.5.tgz",
+			"integrity": "sha512-1Wg0g3BtQF7sSb27fJQAKck1HECM6zV1EB66j8JH9i3LCjYabJa0FSdiSgsD5K/RbrsR0SiraKacLB+T8ZVYAg==",
+			"license": "MIT",
+			"dependencies": {
+				"@types/trusted-types": "*"
+			}
+		},
 		"node_modules/@types/estree": {
 			"version": "1.0.8",
 			"resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -1996,6 +2007,15 @@
 			"integrity": "sha512-nc7XjUU/2Lb+SvEFVGcWLiKkzfw8+qHI7zn8WYXKkLMgfGSHbgCEaR6bJpev8Cm6Rmrb19Gfd/tZvGqx9is3wg==",
 			"license": "MIT"
 		},
+		"node_modules/dompurify": {
+			"version": "3.3.1",
+			"resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.3.1.tgz",
+			"integrity": "sha512-qkdCKzLNtrgPFP1Vo+98FRzJnBRGe4ffyCea9IwHB1fyxPOeNTHpLKYGd4Uk9xvNoH0ZoOjwZxNptyMwqrId1Q==",
+			"license": "(MPL-2.0 OR Apache-2.0)",
+			"optionalDependencies": {
+				"@types/trusted-types": "^2.0.7"
+			}
+		},
 		"node_modules/dotenv": {
 			"version": "16.6.1",
 			"resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.6.1.tgz",