chore(backend,frontend,infra): resolve template update conflicts, mcp and impeccable files stay

frontend/biome.jsonc

@@ -2,7 +2,13 @@
   "$schema": "./node_modules/@biomejs/biome/configuration_schema.json",
   "extends": ["ultracite/biome/core", "ultracite/biome/svelte"],
   "files": {
-    "includes": ["!.claude", "!.svelte-kit", "!build", "!.mcp.json"]
+    "includes": [
+      "!.claude",
+      "!.svelte-kit",
+      "!build",
+      "!.mcp.json",
+      "!.impeccable"
+    ]
   },
   "javascript": { "globals": ["Bun"] },
   "overrides": [