feat: Redesign FloatingTerminal with Windows Vista Aero style

- Slim, transparent Aero Glass design with backdrop blur
- Draggable window from titlebar
- Resizable from corner handle
- Ctrl+E toggle to open at cursor position
- Remove minimize functionality (close returns to sidebar button)
- Add PWA dev-dist files and lock files

server/bun.lock

@@ -0,0 +1,15 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 0,
+  "workspaces": {
+    "": {
+      "name": "agent-ui-server",
+      "dependencies": {
+        "@skitee3000/bun-pty": "^0.3.3",
+      },
+    },
+  },
+  "packages": {
+    "@skitee3000/bun-pty": ["@skitee3000/bun-pty@0.3.3", "", {}, "sha512-y+kA3435zkFjh11KdQMy0ho/UkKN/iae0t9tTE7iZ762Oi2h31dGOvbRIJWeJZ2qYYTJvAd6NEIzJlZUhI6ukw=="],
+  }
+}