feat: live memory materialization — nodes spawn in 3D graph in real-time

When memories are created, promoted, deleted, or dreamed via MCP tools,
the 3D graph now shows spectacular live animations:

- Rainbow particle burst + elastic scale-up on MemoryCreated
- Ripple wave cascading to nearby nodes
- Green pulse + node growth on MemoryPromoted
- Implosion + dissolution on MemoryDeleted
- Edge growth animation on ConnectionDiscovered
- Purple cascade on DreamStarted/DreamProgress/DreamCompleted
- FIFO eviction at 50 live nodes to guard performance

Also: graph center defaults to most-connected node, legacy HTML
redirects to SvelteKit dashboard, CSS height chain fix in layout.

Testing: 150 unit tests (vitest), 11 e2e tests (Playwright with
MCP Streamable HTTP client), 22 proof screenshots.

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

apps/dashboard/vite.config.ts

@@ -1,3 +1,4 @@
+/// <reference types="vitest/config" />
 import { sveltekit } from '@sveltejs/kit/vite';
 import tailwindcss from '@tailwindcss/vite';
 import { defineConfig } from 'vite';
@@ -16,5 +17,16 @@ export default defineConfig({
 				ws: true
 			}
 		}
-	}
+	},
+	test: {
+		include: ['src/**/*.test.ts'],
+		environment: 'node',
+		setupFiles: ['src/lib/graph/__tests__/setup.ts'],
+		alias: {
+			$lib: new URL('./src/lib', import.meta.url).pathname,
+			$components: new URL('./src/lib/components', import.meta.url).pathname,
+			$stores: new URL('./src/lib/stores', import.meta.url).pathname,
+			$types: new URL('./src/lib/types', import.meta.url).pathname,
+		},
+	},
 });