fix: correct current directory detection logic

The issue was that the condition checked for an empty string after normalization,
but path.posix.normalize('') actually returns '.', not ''. This caused the
current directory check to fail when an empty string was passed.

Removed the redundant empty string check since normalize('') returns '.' which
is already handled by the first condition.

Author: hannesrudolph

src/services/code-index/vector-store/qdrant-client.ts

@@ -377,7 +377,8 @@ export class QdrantVectorStore implements IVectorStore {
 			if (directoryPrefix) {
 				// Check if the path represents current directory
 				const normalizedPrefix = path.posix.normalize(directoryPrefix.replace(/\\/g, "/"))
-				if (normalizedPrefix === "." || normalizedPrefix === "./" || normalizedPrefix === "") {
+				// Note: path.posix.normalize("") returns ".", and normalize("./") returns "./"
+				if (normalizedPrefix === "." || normalizedPrefix === "./") {
 					// Don't create a filter - search entire workspace
 					filter = undefined
 				} else {