Fix worktree runtime isolation recovery

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/dev-watch-ignore.ts

@@ -0,0 +1,21 @@
+import fs from "node:fs";
+import path from "node:path";
+
+function addIgnorePath(target: Set<string>, candidate: string): void {
+  target.add(candidate);
+  try {
+    target.add(fs.realpathSync(candidate));
+  } catch {
+    // Ignore paths that do not exist in the current checkout.
+  }
+}
+
+export function resolveServerDevWatchIgnorePaths(serverRoot: string): string[] {
+  const ignorePaths = new Set<string>();
+
+  for (const relativePath of ["../ui/node_modules", "../ui/.vite", "../ui/dist"]) {
+    addIgnorePath(ignorePaths, path.resolve(serverRoot, relativePath));
+  }
+
+  return [...ignorePaths];
+}