Add sync status inside editor

frontend/obsidian-plugin/src/views/editor-sync-line/editor-sync-line.scss

@@ -0,0 +1,43 @@
+.vault-link-sync-status {
+	position: absolute;
+	right: var(--size-4-4);
+	top: var(--size-4-2);
+	opacity: 0.7;
+	cursor: pointer;
+
+	> span {
+		opacity: 0;
+		position: absolute;
+		min-width: 200px;
+		text-align: right;
+		padding-right: var(--size-2-2);
+
+		top: 50%;
+		left: 0;
+		transform: translateY(-50%) translateX(-100%) translateY(-2px);
+		transition: opacity 200ms;
+	}
+
+	&:hover {
+		> span {
+			opacity: 1;
+		}
+	}
+
+	> .icon {
+		line-height: 0;
+	}
+
+	&.loading > .icon {
+		animation: spin 2s linear infinite;
+
+		@keyframes spin {
+			0% {
+				transform: rotate(0deg);
+			}
+			100% {
+				transform: rotate(360deg);
+			}
+		}
+	}
+}