feat: expose drive labels to userspace, render in Files

kernel/src/Fs/Vfs.cpp

@@ -208,6 +208,38 @@ namespace Fs::Vfs {
         return count;
     }
 
+    int VfsDriveLabel(int driveNumber, char* outLabel, int maxLen) {
+        if (outLabel == nullptr || maxLen <= 0) return -1;
+        outLabel[0] = '\0';
+
+        vfsLock.Acquire();
+        if (driveNumber < 0 || driveNumber >= MaxDrives || driveTable[driveNumber] == nullptr) {
+            vfsLock.Release();
+            return -1;
+        }
+
+        if (driveTable[driveNumber]->GetLabel == nullptr) {
+            vfsLock.Release();
+            return 0;
+        }
+
+        const char* label = driveTable[driveNumber]->GetLabel();
+        if (label == nullptr || label[0] == '\0') {
+            vfsLock.Release();
+            return 0;
+        }
+
+        int copied = 0;
+        while (label[copied] != '\0' && copied < maxLen - 1) {
+            outLabel[copied] = label[copied];
+            copied++;
+        }
+        outLabel[copied] = '\0';
+
+        vfsLock.Release();
+        return copied;
+    }
+
     int VfsRename(const char* oldPath, const char* newPath) {
         int oldDrive, newDrive;
         const char* oldLocal;