diff --git a/apps/desktop/src/components/editor/EditorSettingsDialog.vue b/apps/desktop/src/components/editor/EditorSettingsDialog.vue
index e5b1a256b..5fdfc9ad5 100644
--- a/apps/desktop/src/components/editor/EditorSettingsDialog.vue
+++ b/apps/desktop/src/components/editor/EditorSettingsDialog.vue
@@ -4660,9 +4660,9 @@ onUnmounted(() => {
                     <SelectValue />
                   </SelectTrigger>
                   <SelectContent>
+                    <SelectItem value="comment-inline">{{ t("settings.sidebarObjectInfoModeCommentInline") }}</SelectItem>
                     <SelectItem value="comment-aligned">{{ t("settings.sidebarObjectInfoModeCommentAligned") }}</SelectItem>
                     <SelectItem value="comment-right">{{ t("settings.sidebarObjectInfoModeCommentRight") }}</SelectItem>
-                    <SelectItem value="comment-inline">{{ t("settings.sidebarObjectInfoModeCommentInline") }}</SelectItem>
                     <SelectItem value="size">{{ t("settings.sidebarObjectInfoModeSize") }}</SelectItem>
                     <SelectItem value="hidden">{{ t("settings.sidebarObjectInfoModeHidden") }}</SelectItem>
                   </SelectContent>
diff --git a/apps/desktop/src/components/sidebar/TreeItem.vue b/apps/desktop/src/components/sidebar/TreeItem.vue
index f06481af0..ee222190b 100644
--- a/apps/desktop/src/components/sidebar/TreeItem.vue
+++ b/apps/desktop/src/components/sidebar/TreeItem.vue
@@ -428,6 +428,7 @@ const detailTooltip = computed(() => {
       { label: t("connection.user"), value: cleanTooltipValue(config.username) },
       { label: t("connection.type"), value: config.driver_label || config.driver_profile || config.db_type },
       { label: t("connection.databaseInfo.productVersion"), value: cleanTooltipValue(config.database_info?.productVersion) },
+      { label: t("connection.note"), value: cleanTooltipValue(config.note), multiline: true },
     ].filter((row) => row.value);
     return { rows };
   }
@@ -612,7 +613,9 @@ function formattedObjectStorage(): string {
   return formatSidebarObjectStorage(activeNode.value.sizeBytes);
 }
 
-const alignedCommentLabelWidth = computed(() => (settingsStore.editorSettings.sidebarObjectInfoMode === "comment-aligned" ? props.commentLabelWidth : undefined));
+// 连接节点不参与 aligned 对齐：顶层连接各自独立，按同层最大 label 宽对齐只会让短连接名
+// 后留下一大段空白。无论全局是 aligned 还是 inline，连接节点的 comment 都紧跟 label。
+const alignedCommentLabelWidth = computed(() => (settingsStore.editorSettings.sidebarObjectInfoMode === "comment-aligned" && activeNode.value.type !== "connection" ? props.commentLabelWidth : undefined));
 
 function alignedCommentLeadingStyle(): { width: string } | undefined {
   const width = alignedCommentLeadingWidth(alignedCommentLabelWidth.value, canTreeNodePin(activeNode.value.type));
@@ -627,7 +630,13 @@ const usesFullWidthLabel = computed(() => usesFullWidthTreeLabel(activeNode.valu
 
 const rowWidthClass = computed(() => (usesFullWidthLabel.value ? "w-max min-w-full" : "w-full min-w-0"));
 
-const labelWidthClass = computed(() => treeLabelWidthClass({ fullWidth: usesFullWidthLabel.value, hasTrailingComment: hasTrailingMetadata(), hasInlineAction: isPinned.value }));
+const labelWidthClass = computed(() => {
+  // aligned 模式靠 leading 块固定宽度对齐 comment 列，label 需 flex-1 撑满 leading 块；
+  // inline/right 模式 leading 块无固定宽度，label 用 shrink 让 comment 紧跟 label，
+  // 避免 label flex-1 把 leading 块撑到整行、comment 被推到视口最右端。
+  const alignLeading = alignedCommentLabelWidth.value !== undefined;
+  return treeLabelWidthClass({ fullWidth: usesFullWidthLabel.value, hasTrailingComment: hasTrailingMetadata(), hasInlineAction: isPinned.value, alignLeading });
+});
 
 watch(() => [isRightAlignedComment(), visibleLabel(activeNode.value), trailingComment.value, trailingCommentLayoutRef.value, trailingCommentLeadingRef.value], refreshTrailingCommentMeasurement, { flush: "post", immediate: true });
 
@@ -1151,7 +1160,7 @@ function onKeydown(event: KeyboardEvent) {
               @keydown.escape.prevent="isRenamingGroup = false"
               @click.stop
             />
-            <span v-else ref="labelRef" :class="[labelWidthClass, { 'flex-1': node.type === 'connection' }]">{{ visibleLabel(node) }}</span>
+            <span v-else ref="labelRef" :class="[labelWidthClass, { 'flex-1': node.type === 'connection' && !trailingComment }]">{{ visibleLabel(node) }}</span>
             <button
               v-if="canDragPinnedOrder()"
               type="button"
@@ -1186,7 +1195,7 @@ function onKeydown(event: KeyboardEvent) {
               {{ t("editor.defaultDatabase") }}
             </Badge>
           </div>
-          <span v-if="trailingComment && !isRightAlignedComment()" class="sidebar-object-comment ml-2 min-w-0 flex-1 truncate text-left" :class="{ 'sidebar-object-comment--windows': useWindowsSidebarCommentFont }">{{ trailingComment }}</span>
+          <span v-if="trailingComment && !isRightAlignedComment()" class="sidebar-object-comment ml-4 min-w-0 flex-1 truncate text-left" :class="{ 'sidebar-object-comment--windows': useWindowsSidebarCommentFont }">{{ trailingComment }}</span>
           <span v-if="isRightAlignedComment() && trailingCommentMaxWidth > 0" class="min-w-0 flex-1" aria-hidden="true" />
           <span
             v-if="isRightAlignedComment() && trailingCommentMaxWidth > 0"
diff --git a/apps/desktop/src/lib/__tests__/sidebar/sidebarTreeItemLayout.spec.ts b/apps/desktop/src/lib/__tests__/sidebar/sidebarTreeItemLayout.spec.ts
index 686df5ad9..63e89ea91 100644
--- a/apps/desktop/src/lib/__tests__/sidebar/sidebarTreeItemLayout.spec.ts
+++ b/apps/desktop/src/lib/__tests__/sidebar/sidebarTreeItemLayout.spec.ts
@@ -7,8 +7,10 @@ describe("sidebar tree item layout", () => {
     expect(usesFullWidthTreeLabel("table", true, true)).toBe(false);
   });
 
-  it("lets a table name consume the available row width before truncating", () => {
-    expect(treeLabelWidthClass({ fullWidth: false, hasTrailingComment: true })).toBe("min-w-0 flex-1 truncate");
+  it("lets a table name consume the available row width before truncating when aligned", () => {
+    expect(treeLabelWidthClass({ fullWidth: false, hasTrailingComment: true, alignLeading: true })).toBe("min-w-0 flex-1 truncate");
+    // inline/right 模式 label 不撑满，让 comment 紧跟
+    expect(treeLabelWidthClass({ fullWidth: false, hasTrailingComment: true, alignLeading: false })).toBe("min-w-0 shrink truncate");
   });
 
   it("keeps a pinned action next to the name while preserving the aligned comment column", () => {
diff --git a/apps/desktop/src/lib/sidebar/sidebarLayout.ts b/apps/desktop/src/lib/sidebar/sidebarLayout.ts
index 1116c8e45..acea69a4b 100644
--- a/apps/desktop/src/lib/sidebar/sidebarLayout.ts
+++ b/apps/desktop/src/lib/sidebar/sidebarLayout.ts
@@ -130,6 +130,8 @@ function makeConnectionNode(config: ConnectionConfig, pinned: boolean): TreeNode
     isExpanded: false,
     children: [],
     pinned,
+    // 连接备注复用 TreeNode.comment 通道，侧边栏按 sidebarObjectInfoMode 渲染。
+    comment: config.note || null,
   };
 }
 
diff --git a/apps/desktop/src/lib/sidebar/sidebarTreeItemLayout.ts b/apps/desktop/src/lib/sidebar/sidebarTreeItemLayout.ts
index 1ce03d5df..034a43ab1 100644
--- a/apps/desktop/src/lib/sidebar/sidebarTreeItemLayout.ts
+++ b/apps/desktop/src/lib/sidebar/sidebarTreeItemLayout.ts
@@ -55,7 +55,7 @@ const pinnableTypes: Set<TreeNodeType> = new Set([
   "nacos-namespace",
 ]);
 
-const commentTypes: Set<TreeNodeType> = new Set(["schema", "table", "view", "materialized_view", "column", "mongo-collection", "vector-collection", "elasticsearch-index"]);
+const commentTypes: Set<TreeNodeType> = new Set(["connection", "schema", "table", "view", "materialized_view", "column", "mongo-collection", "vector-collection", "elasticsearch-index"]);
 
 export function treeItemPaddingLeft(depth: number): string {
   return `${depth * 16 + 8}px`;
@@ -140,10 +140,13 @@ export function usesFullWidthTreeLabel(type: TreeNodeType, allowHorizontalScroll
   return allowHorizontalScroll && !hasTrailingComment && fullWidthLabelTypes.has(type);
 }
 
-export function treeLabelWidthClass({ fullWidth, hasTrailingComment, hasInlineAction = false }: { fullWidth: boolean; hasTrailingComment: boolean; hasInlineAction?: boolean }): string {
+export function treeLabelWidthClass({ fullWidth, hasTrailingComment, hasInlineAction = false, alignLeading = false }: { fullWidth: boolean; hasTrailingComment: boolean; hasInlineAction?: boolean; alignLeading?: boolean }): string {
   if (fullWidth) return "shrink-0 whitespace-nowrap";
   if (hasTrailingComment && hasInlineAction) return "min-w-0 shrink truncate";
-  return hasTrailingComment ? "min-w-0 flex-1 truncate" : "min-w-0 truncate";
+  // aligned 模式靠 leading 块固定宽度对齐 comment 列，label 需 flex-1 撑满 leading 块；
+  // inline/right 模式 label 用 shrink 让 comment 紧跟，避免 label 撑满把 comment 推到最右。
+  if (hasTrailingComment) return alignLeading ? "min-w-0 flex-1 truncate" : "min-w-0 shrink truncate";
+  return "min-w-0 truncate";
 }
 
 export function canTreeNodeExpand(type: TreeNodeType): boolean {
diff --git a/apps/desktop/src/stores/__tests__/settingsStore.spec.ts b/apps/desktop/src/stores/__tests__/settingsStore.spec.ts
index 9a5f01b9c..6cdf936c1 100644
--- a/apps/desktop/src/stores/__tests__/settingsStore.spec.ts
+++ b/apps/desktop/src/stores/__tests__/settingsStore.spec.ts
@@ -21,19 +21,19 @@ describe("normalizeEditorSettings", () => {
     expect(normalizeEditorSettings({ regexMaxMatchCount: Number.POSITIVE_INFINITY }).regexMaxMatchCount).toBe(1000);
     expect(normalizeEditorSettings({ regexMaxMatchCount: Number.NaN }).regexMaxMatchCount).toBe(1000);
   });
-  it("uses aligned comments by default and preserves legacy comment visibility", () => {
-    expect(normalizeEditorSettings({}).sidebarObjectInfoMode).toBe("comment-aligned");
+  it("uses inline comments by default and preserves legacy comment visibility", () => {
+    expect(normalizeEditorSettings({}).sidebarObjectInfoMode).toBe("comment-inline");
     expect(normalizeEditorSettings({ sidebarObjectInfoMode: "comment-aligned" }).sidebarObjectInfoMode).toBe("comment-aligned");
     expect(normalizeEditorSettings({ sidebarObjectInfoMode: "comment-inline" }).sidebarObjectInfoMode).toBe("comment-inline");
     expect(normalizeEditorSettings({ sidebarObjectInfoMode: "comment-right" }).sidebarObjectInfoMode).toBe("comment-right");
     expect(normalizeEditorSettings({ sidebarObjectInfoMode: "size" }).sidebarObjectInfoMode).toBe("size");
     expect(normalizeEditorSettings({ sidebarTableCommentLayout: "aligned" } as any).sidebarObjectInfoMode).toBe("comment-aligned");
     expect(normalizeEditorSettings({ sidebarTableCommentLayout: "hidden" } as any).sidebarObjectInfoMode).toBe("hidden");
-    expect(normalizeEditorSettings({ sidebarHideTableComments: false } as any).sidebarObjectInfoMode).toBe("comment-aligned");
+    expect(normalizeEditorSettings({ sidebarHideTableComments: false } as any).sidebarObjectInfoMode).toBe("comment-inline");
     expect(normalizeEditorSettings({ sidebarHideTableComments: true } as any).sidebarObjectInfoMode).toBe("hidden");
     expect(normalizeEditorSettings({ sidebarHideTableComments: true, sidebarShowDatabaseSizes: true } as any).sidebarObjectInfoMode).toBe("hidden");
     expect(normalizeEditorSettings({ sidebarShowDatabaseSizes: true } as any).sidebarObjectInfoMode).toBe("size");
-    expect(normalizeEditorSettings({ sidebarObjectInfoMode: "invalid" } as any).sidebarObjectInfoMode).toBe("comment-aligned");
+    expect(normalizeEditorSettings({ sidebarObjectInfoMode: "invalid" } as any).sidebarObjectInfoMode).toBe("comment-inline");
   });
 
   it("defaults SQL execution to the current statement and migrates legacy execute-all settings", () => {
diff --git a/apps/desktop/src/stores/connectionStore.ts b/apps/desktop/src/stores/connectionStore.ts
index 0fc5e6ba4..07cb2f943 100644
--- a/apps/desktop/src/stores/connectionStore.ts
+++ b/apps/desktop/src/stores/connectionStore.ts
@@ -2698,6 +2698,7 @@ export const useConnectionStore = defineStore("connection", () => {
         existing.label = config.name;
         existing.type = "connection";
         existing.connectionId = id;
+        existing.comment = config.note || null;
         existing.children = existing.children || [];
       } else {
         treeNodes.value.push({
@@ -2707,6 +2708,7 @@ export const useConnectionStore = defineStore("connection", () => {
           connectionId: id,
           isExpanded: false,
           children: [],
+          comment: config.note || null,
         });
       }
       return id;
diff --git a/apps/desktop/src/stores/settingsStore.ts b/apps/desktop/src/stores/settingsStore.ts
index 0c49a32ce..85fd53ecc 100644
--- a/apps/desktop/src/stores/settingsStore.ts
+++ b/apps/desktop/src/stores/settingsStore.ts
@@ -684,7 +684,7 @@ export const DEFAULT_EDITOR_SETTINGS: EditorSettings = {
   prefillNewQueryWithSelect: true,
   updateNotificationsEnabled: true,
   sidebarHiddenTablePrefixes: [],
-  sidebarObjectInfoMode: "comment-aligned",
+  sidebarObjectInfoMode: "comment-inline",
   sidebarAllowHorizontalScroll: false,
   columnFormatters: {},
   customColumnFormatters: {},
diff --git a/packages/app-tests/sidebarTreeItemLayout.test.ts b/packages/app-tests/sidebarTreeItemLayout.test.ts
index 0758b2a3e..d54e6e784 100644
--- a/packages/app-tests/sidebarTreeItemLayout.test.ts
+++ b/packages/app-tests/sidebarTreeItemLayout.test.ts
@@ -14,8 +14,10 @@ test("Nacos namespace rows can show the pin action", () => {
   assert.equal(canTreeNodePin("nacos-namespace"), true);
 });
 
-test("labels with trailing comments consume the available row width", () => {
-  assert.equal(treeLabelWidthClass({ fullWidth: false, hasTrailingComment: true }), "min-w-0 flex-1 truncate");
+test("labels with trailing comments consume the available row width when aligned", () => {
+  assert.equal(treeLabelWidthClass({ fullWidth: false, hasTrailingComment: true, alignLeading: true }), "min-w-0 flex-1 truncate");
+  // inline/right 模式 label 不撑满，让 comment 紧跟
+  assert.equal(treeLabelWidthClass({ fullWidth: false, hasTrailingComment: true, alignLeading: false }), "min-w-0 shrink truncate");
   assert.equal(treeLabelWidthClass({ fullWidth: false, hasTrailingComment: false }), "min-w-0 truncate");
 });