diff --git a/apps/desktop/src/components/grid/DataGridColumnHeader.vue b/apps/desktop/src/components/grid/DataGridColumnHeader.vue
index 9fc1f0bc99..0001e419b3 100644
--- a/apps/desktop/src/components/grid/DataGridColumnHeader.vue
+++ b/apps/desktop/src/components/grid/DataGridColumnHeader.vue
@@ -58,65 +58,65 @@ const emit = defineEmits<{
 </script>
 
 <template>
-  <LightTooltip :text="name" side="bottom" :side-offset="4" :disabled="tooltipDisabled">
-    <div
-      class="data-grid-header-cell shrink-0 px-2 py-1.5 border-r border-border whitespace-nowrap hover:bg-gray-200 dark:hover:bg-gray-800 select-none relative overflow-hidden"
-      :class="[dark && 'data-grid-header-cell--dark', selected && 'data-grid-header-cell--selected', searchMatch && 'bg-amber-500/20 ring-1 ring-inset ring-amber-500/40', frozen && 'data-grid-header-cell--frozen', frozenSeparator && 'data-grid-header-cell--frozen-separator', dragClass]"
-      :style="columnStyle"
-      :data-grid-column-index="actualColumnIndex"
-      :data-visible-col-index="visibleColumnIndex"
-      @pointerdown="emit('pointerdown', $event)"
-      @click.capture="emit('clickCapture', $event)"
-      @click="emit('click', $event)"
-      @contextmenu="emit('contextmenu', $event)"
-    >
-      <span class="flex min-w-0 items-center gap-1 overflow-hidden">
-        <!-- 索引标识：显示在列名左侧 -->
-        <KeyRound v-if="columnIndexKind === 'primary'" class="h-3 w-3 shrink-0" :class="columnIndexColorClass(columnIndexKind)" :title="columnIndexText(columnIndexKind)" />
-        <Hash v-else-if="columnIndexKind && columnIndexKind !== 'none'" class="h-3 w-3 shrink-0" :class="columnIndexColorClass(columnIndexKind)" :title="columnIndexText(columnIndexKind)" />
-        <span class="flex min-w-0 flex-1 flex-col overflow-hidden">
+  <div
+    class="data-grid-header-cell shrink-0 px-2 py-1.5 border-r border-border whitespace-nowrap hover:bg-gray-200 dark:hover:bg-gray-800 select-none relative overflow-hidden"
+    :class="[dark && 'data-grid-header-cell--dark', selected && 'data-grid-header-cell--selected', searchMatch && 'bg-amber-500/20 ring-1 ring-inset ring-amber-500/40', frozen && 'data-grid-header-cell--frozen', frozenSeparator && 'data-grid-header-cell--frozen-separator', dragClass]"
+    :style="columnStyle"
+    :data-grid-column-index="actualColumnIndex"
+    :data-visible-col-index="visibleColumnIndex"
+    @pointerdown="emit('pointerdown', $event)"
+    @click.capture="emit('clickCapture', $event)"
+    @click="emit('click', $event)"
+    @contextmenu="emit('contextmenu', $event)"
+  >
+    <span class="flex min-w-0 items-center gap-1 overflow-hidden">
+      <!-- 索引标识：显示在列名左侧 -->
+      <KeyRound v-if="columnIndexKind === 'primary'" class="h-3 w-3 shrink-0" :class="columnIndexColorClass(columnIndexKind)" :title="columnIndexText(columnIndexKind)" />
+      <Hash v-else-if="columnIndexKind && columnIndexKind !== 'none'" class="h-3 w-3 shrink-0" :class="columnIndexColorClass(columnIndexKind)" :title="columnIndexText(columnIndexKind)" />
+      <LightTooltip :text="name" side="bottom" :side-offset="4" :disabled="tooltipDisabled">
+        <span data-column-tooltip-trigger class="flex min-w-0 flex-1 flex-col overflow-hidden">
           <span class="min-w-0 truncate leading-4">{{ name }}</span>
           <span v-if="showTypeLine" data-grid-header-type-line class="h-3 min-w-0 truncate text-[10px] font-normal leading-3" :class="[typeClass, { invisible: !columnType }]" :title="columnType || undefined" :aria-hidden="columnType ? undefined : true">{{ columnType }}</span>
           <span v-if="showCommentLine" data-grid-header-comment-line class="h-3 min-w-0 truncate text-[10px] font-normal leading-3 text-muted-foreground" :class="{ invisible: !columnComment }" :title="columnComment || undefined" :aria-hidden="columnComment ? undefined : true">{{
             columnComment
           }}</span>
         </span>
-        <slot name="actions" />
-      </span>
-      <div data-column-resize-handle class="absolute right-0 top-0 bottom-0 w-1.5 cursor-col-resize hover:bg-primary/30" @mousedown.stop="emit('resizeStart', $event)" @click.stop.prevent @dblclick.stop="emit('autoFit')" />
-    </div>
-    <template #content>
-      <div class="grid min-w-56 grid-cols-[auto_minmax(0,1fr)] gap-x-2 gap-y-1 px-3 py-2">
-        <span class="text-background/70">{{ columnNameLabel }}</span>
-        <span class="flex min-w-0 items-center gap-2">
-          <span class="min-w-0 flex-1 truncate font-mono">{{ name }}</span>
-          <button type="button" class="flex h-5 w-5 shrink-0 items-center justify-center rounded hover:bg-background/10" :title="copyColumnNameLabel" @click.stop="emit('copyName')">
-            <Copy class="h-3 w-3" />
-          </button>
-        </span>
-        <template v-if="tooltipColumnType ?? columnType">
-          <span class="text-background/70">{{ columnTypeLabel }}</span>
-          <span :class="typeClass">{{ tooltipColumnType ?? columnType }}</span>
+        <template #content>
+          <div class="grid min-w-56 grid-cols-[auto_minmax(0,1fr)] gap-x-2 gap-y-1 px-3 py-2">
+            <span class="text-background/70">{{ columnNameLabel }}</span>
+            <span class="flex min-w-0 items-center gap-2">
+              <span class="min-w-0 flex-1 truncate font-mono">{{ name }}</span>
+              <button type="button" class="flex h-5 w-5 shrink-0 items-center justify-center rounded hover:bg-background/10" :title="copyColumnNameLabel" @click.stop="emit('copyName')">
+                <Copy class="h-3 w-3" />
+              </button>
+            </span>
+            <template v-if="tooltipColumnType ?? columnType">
+              <span class="text-background/70">{{ columnTypeLabel }}</span>
+              <span :class="typeClass">{{ tooltipColumnType ?? columnType }}</span>
+            </template>
+            <template v-if="tooltipColumnComment ?? columnComment">
+              <span class="text-background/70">{{ columnCommentLabel }}</span>
+              <span>{{ tooltipColumnComment ?? columnComment }}</span>
+            </template>
+            <template v-if="columnNullability">
+              <span class="text-background/70">{{ nullableLabel }}</span>
+              <span>{{ columnNullability === "nullable" ? yesLabel : noLabel }}</span>
+            </template>
+            <template v-if="columnIndexKind && columnIndexKind !== 'none'">
+              <span class="text-background/70">{{ columnIndexLabel }}</span>
+              <span class="flex items-center gap-1">
+                <KeyRound v-if="columnIndexKind === 'primary'" class="h-3 w-3" :class="columnIndexColorClass(columnIndexKind)" />
+                <Hash v-else class="h-3 w-3" :class="columnIndexColorClass(columnIndexKind)" />
+                <span :class="columnIndexColorClass(columnIndexKind)">{{ columnIndexText(columnIndexKind) }}</span>
+              </span>
+            </template>
+          </div>
         </template>
-        <template v-if="tooltipColumnComment ?? columnComment">
-          <span class="text-background/70">{{ columnCommentLabel }}</span>
-          <span>{{ tooltipColumnComment ?? columnComment }}</span>
-        </template>
-        <template v-if="columnNullability">
-          <span class="text-background/70">{{ nullableLabel }}</span>
-          <span>{{ columnNullability === "nullable" ? yesLabel : noLabel }}</span>
-        </template>
-        <template v-if="columnIndexKind && columnIndexKind !== 'none'">
-          <span class="text-background/70">{{ columnIndexLabel }}</span>
-          <span class="flex items-center gap-1">
-            <KeyRound v-if="columnIndexKind === 'primary'" class="h-3 w-3" :class="columnIndexColorClass(columnIndexKind)" />
-            <Hash v-else class="h-3 w-3" :class="columnIndexColorClass(columnIndexKind)" />
-            <span :class="columnIndexColorClass(columnIndexKind)">{{ columnIndexText(columnIndexKind) }}</span>
-          </span>
-        </template>
-      </div>
-    </template>
-  </LightTooltip>
+      </LightTooltip>
+      <span data-column-header-actions class="contents"><slot name="actions" /></span>
+    </span>
+    <div data-column-resize-handle class="absolute right-0 top-0 bottom-0 w-1.5 cursor-col-resize hover:bg-primary/30" @mousedown.stop="emit('resizeStart', $event)" @click.stop.prevent @dblclick.stop="emit('autoFit')" />
+  </div>
 </template>
 
 <style scoped>
diff --git a/apps/desktop/src/components/grid/DataGridConditionEditor.vue b/apps/desktop/src/components/grid/DataGridConditionEditor.vue
index d788851f9f..2d33a80acc 100644
--- a/apps/desktop/src/components/grid/DataGridConditionEditor.vue
+++ b/apps/desktop/src/components/grid/DataGridConditionEditor.vue
@@ -53,6 +53,7 @@ const expandedHeight = ref(56);
 const suggestionPosition = ref({ left: 0, top: 0, width: 180 });
 const historyPreview = ref<{ value: string; left: number; top: number; maxWidth: number; arrowTop: number; side: "left" | "right" } | null>(null);
 const pointerMovedSuggestionIndex = ref(-1);
+const editorFocused = ref(false);
 let collapseTimer: ReturnType<typeof setTimeout> | undefined;
 let resizeObserver: ResizeObserver | undefined;
 let expandAfterComposition = false;
@@ -67,6 +68,7 @@ const editor = useDataGridConditionEditor({
   historyScope: () => props.historyScope,
   suggestionProvider: props.suggestionProvider,
   suggestionDebounceMs: props.suggestionDebounceMs,
+  suggestionsEnabled: editorFocused,
 });
 
 const activeEditor = computed(() => overlayRef.value ?? inputRef.value);
@@ -316,6 +318,7 @@ function syncSelection(target: HTMLTextAreaElement) {
 }
 
 function onFocus(event: FocusEvent) {
+  editorFocused.value = true;
   syncSelection(event.currentTarget as HTMLTextAreaElement);
   resizeEditor(true);
 }
@@ -334,6 +337,8 @@ function scheduleCollapse() {
   collapseTimer = setTimeout(() => {
     const active = document.activeElement;
     if (active === inputRef.value || active === overlayRef.value) return;
+    editorFocused.value = false;
+    editor.dismiss();
     expanded.value = false;
   }, 0);
 }
diff --git a/apps/desktop/src/components/grid/__tests__/DataGridConditionEditor.spec.ts b/apps/desktop/src/components/grid/__tests__/DataGridConditionEditor.spec.ts
index 591a463997..8594bd1381 100644
--- a/apps/desktop/src/components/grid/__tests__/DataGridConditionEditor.spec.ts
+++ b/apps/desktop/src/components/grid/__tests__/DataGridConditionEditor.spec.ts
@@ -62,6 +62,20 @@ afterEach(() => {
 });
 
 describe("DataGridConditionEditor quote completion", () => {
+  it("does not open suggestions for a programmatic value update while unfocused", async () => {
+    const { value, input } = mountEditor("where", "", { columns: ["status", "started_at"] });
+
+    value.value = "sta";
+    await nextTick();
+    await new Promise((resolve) => setTimeout(resolve, 0));
+    expect(document.querySelector('[role="listbox"]')).toBeNull();
+
+    input.focus();
+    input.setSelectionRange(3, 3);
+    input.dispatchEvent(new Event("select", { bubbles: true }));
+    await vi.waitFor(() => expect(document.querySelectorAll('[role="option"]')).toHaveLength(2));
+  });
+
   it("inserts paired quotes in WHERE and places the caret between them", async () => {
     const { value, input } = mountEditor("where", "id = ");
     input.focus();
diff --git a/apps/desktop/src/components/grid/__tests__/DataGridSurfaces.spec.ts b/apps/desktop/src/components/grid/__tests__/DataGridSurfaces.spec.ts
index b3ebf55e71..dfb1161dd7 100644
--- a/apps/desktop/src/components/grid/__tests__/DataGridSurfaces.spec.ts
+++ b/apps/desktop/src/components/grid/__tests__/DataGridSurfaces.spec.ts
@@ -291,6 +291,26 @@ describe("DataGridPagination", () => {
 });
 
 describe("DataGridColumnHeader", () => {
+  it("limits the metadata tooltip trigger to the column text block", () => {
+    const mounted = mountComponent(DataGridColumnHeader, {
+      name: "status",
+      actualColumnIndex: 0,
+      visibleColumnIndex: 0,
+      copyColumnNameLabel: "copy",
+      columnNameLabel: "name",
+      columnTypeLabel: "type",
+      columnCommentLabel: "comment",
+    });
+    const tooltip = findOne(mounted.root, (node) => node.props["data-stub"] === "LightTooltip");
+    const trigger = findOne(mounted.root, (node) => node.props["data-column-tooltip-trigger"] === "");
+    const actions = findOne(mounted.root, (node) => node.props["data-column-header-actions"] === "");
+    const resizeHandle = findOne(mounted.root, (node) => node.props["data-column-resize-handle"] === "");
+
+    expect(trigger.parent).toBe(tooltip);
+    expect(actions.parent).not.toBe(tooltip);
+    expect(resizeHandle.parent).not.toBe(tooltip);
+  });
+
   it("cancels resize-handle clicks without leaking header click events", () => {
     const click = vi.fn();
     const clickCapture = vi.fn();
diff --git a/apps/desktop/src/composables/useDataGridConditionEditor.ts b/apps/desktop/src/composables/useDataGridConditionEditor.ts
index 18ff1f7822..57aea0741c 100644
--- a/apps/desktop/src/composables/useDataGridConditionEditor.ts
+++ b/apps/desktop/src/composables/useDataGridConditionEditor.ts
@@ -45,6 +45,7 @@ export interface UseDataGridConditionEditorOptions {
   suggestionProvider?: DataGridConditionSuggestionProvider;
   suggestionDebounceMs?: number;
   suggestionLimit?: number;
+  suggestionsEnabled?: MaybeRefOrGetter<boolean>;
 }
 
 const WHERE_TOKEN_PATTERN = /([^\s,()><=!&|]+)$/;
@@ -299,6 +300,7 @@ export function useDataGridConditionEditor(options: UseDataGridConditionEditorOp
     suggestions.value = [];
     highlightedIndex.value = -1;
     historyOpen.value = false;
+    if (options.suggestionsEnabled !== undefined && !toValue(options.suggestionsEnabled)) return;
     if (!value.trim()) return;
 
     const target = conditionCompletionTarget(options.kind, value, selectionStart, selectionEnd, toValue(options.identifierQuote));