feat: Electrobun Svelte+WGPU prototype (Dawn GPU confirmed on Linux)

- Svelte 5 frontend with Catppuccin Mocha theme, 2 project cards
- Electrobun v1.16.0 with bundleWGPU: true (Dawn on Linux x64)
- WebKitGTK webview + WGPU surface coexistence confirmed
- CPU: 6.5% idle (CSS animation + WebKitGTK overhead)
- Port 9760 for dev server (project convention)

ui-electrobun/llms.txt

@@ -0,0 +1,24 @@
+# Electrobun Project
+
+This is an Electrobun desktop application.
+
+IMPORTANT: Electrobun is NOT Electron. Do not use Electron APIs or patterns.
+
+## Documentation
+
+Full API reference: https://blackboard.sh/electrobun/llms.txt
+Getting started: https://blackboard.sh/electrobun/docs/
+
+## Quick Reference
+
+Import patterns:
+- Main process (Bun): `import { BrowserWindow } from "electrobun/bun"`
+- Browser context: `import { Electroview } from "electrobun/view"`
+
+Use `views://` URLs to load bundled assets (e.g., `url: "views://mainview/index.html"`).
+Views must be configured in `electrobun.config.ts` to be built and copied into the bundle.
+
+## About
+
+Electrobun is built by Blackboard (https://blackboard.sh), an innovation lab building
+tools and funding teams that define the next generation of technology.