Admin UI: Add policies (#6968)

* add policies to UI, accessing filer directly

* view, edit policies

* add back buttons for "users" page

* remove unused

* fix ui dark mode when modal is closed

* bucket view details button

* fix browser buttons

* filer action button works

* clean up masters page

* fix volume servers action buttons

* fix collections page action button

* fix properties page

* more obvious

* fix directory creation file mode

* Update file_browser_handlers.go

* directory permission

weed/admin/dash/file_mode_utils.go

@@ -0,0 +1,85 @@
+package dash
+
+// FormatFileMode converts file mode to Unix-style string representation (e.g., "drwxr-xr-x")
+// Handles both Go's os.ModeDir format and standard Unix file type bits
+func FormatFileMode(mode uint32) string {
+	var result []byte = make([]byte, 10)
+
+	// File type - handle Go's os.ModeDir first, then standard Unix file type bits
+	if mode&0x80000000 != 0 { // Go's os.ModeDir (0x80000000 = 2147483648)
+		result[0] = 'd'
+	} else {
+		switch mode & 0170000 { // S_IFMT mask
+		case 0040000: // S_IFDIR
+			result[0] = 'd'
+		case 0100000: // S_IFREG
+			result[0] = '-'
+		case 0120000: // S_IFLNK
+			result[0] = 'l'
+		case 0020000: // S_IFCHR
+			result[0] = 'c'
+		case 0060000: // S_IFBLK
+			result[0] = 'b'
+		case 0010000: // S_IFIFO
+			result[0] = 'p'
+		case 0140000: // S_IFSOCK
+			result[0] = 's'
+		default:
+			result[0] = '-' // S_IFREG is default
+		}
+	}
+
+	// Permission bits (always use the lower 12 bits regardless of file type format)
+	// Owner permissions
+	if mode&0400 != 0 { // S_IRUSR
+		result[1] = 'r'
+	} else {
+		result[1] = '-'
+	}
+	if mode&0200 != 0 { // S_IWUSR
+		result[2] = 'w'
+	} else {
+		result[2] = '-'
+	}
+	if mode&0100 != 0 { // S_IXUSR
+		result[3] = 'x'
+	} else {
+		result[3] = '-'
+	}
+
+	// Group permissions
+	if mode&0040 != 0 { // S_IRGRP
+		result[4] = 'r'
+	} else {
+		result[4] = '-'
+	}
+	if mode&0020 != 0 { // S_IWGRP
+		result[5] = 'w'
+	} else {
+		result[5] = '-'
+	}
+	if mode&0010 != 0 { // S_IXGRP
+		result[6] = 'x'
+	} else {
+		result[6] = '-'
+	}
+
+	// Other permissions
+	if mode&0004 != 0 { // S_IROTH
+		result[7] = 'r'
+	} else {
+		result[7] = '-'
+	}
+	if mode&0002 != 0 { // S_IWOTH
+		result[8] = 'w'
+	} else {
+		result[8] = '-'
+	}
+	if mode&0001 != 0 { // S_IXOTH
+		result[9] = 'x'
+	} else {
+		result[9] = '-'
+	}
+
+	return string(result)
+}