diff --git a/apps/desktop/src/components/codeSnapshot/CodeSnapshotDialog.vue b/apps/desktop/src/components/codeSnapshot/CodeSnapshotDialog.vue
index 508e063349..4768343a67 100644
--- a/apps/desktop/src/components/codeSnapshot/CodeSnapshotDialog.vue
+++ b/apps/desktop/src/components/codeSnapshot/CodeSnapshotDialog.vue
@@ -158,7 +158,7 @@ const previewVisible = computed(() => open.value && !!props.source);
   <Dialog v-model:open="open">
     <!-- 对话框整体限高：高度上限跟随 --dbx-viewport-height（兼容旧版 WebView 中 vh 不准的情况）；
          内部采用纵向 flex 布局，header/footer 固定，只有中间预览区滚动，保证底部按钮始终可见 -->
-    <DialogContent class="flex max-h-[calc(var(--dbx-viewport-height)-2rem)] flex-col overflow-hidden border border-border !bg-background text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[860px]">
+    <DialogContent class="flex max-h-[calc(var(--dbx-viewport-height)-2rem)] flex-col overflow-hidden border border-border !bg-background-solid text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[860px]">
       <DialogHeader>
         <DialogTitle class="flex items-center gap-2">
           <Camera class="h-5 w-5 text-primary" />
diff --git a/apps/desktop/src/components/editor/DelimitedListDialog.vue b/apps/desktop/src/components/editor/DelimitedListDialog.vue
index 022a11fe2c..f796ea5f9c 100644
--- a/apps/desktop/src/components/editor/DelimitedListDialog.vue
+++ b/apps/desktop/src/components/editor/DelimitedListDialog.vue
@@ -151,7 +151,7 @@ async function copyPreview() {
 
 <template>
   <Dialog v-model:open="open">
-    <DialogContent class="max-h-[86vh] border border-border !bg-background text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[620px]">
+    <DialogContent class="max-h-[86vh] border border-border !bg-background-solid text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[620px]">
       <DialogHeader>
         <DialogTitle class="flex items-center gap-2">
           <List class="h-5 w-5 text-primary" />
diff --git a/apps/desktop/src/components/editor/SqlParameterDialog.vue b/apps/desktop/src/components/editor/SqlParameterDialog.vue
index 3e57e9b538..4949ca6f0a 100644
--- a/apps/desktop/src/components/editor/SqlParameterDialog.vue
+++ b/apps/desktop/src/components/editor/SqlParameterDialog.vue
@@ -150,7 +150,7 @@ async function copyResolvedSql() {
 
 <template>
   <Dialog v-model:open="open">
-    <DialogContent class="max-h-[86vh] border border-border !bg-background text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[720px]">
+    <DialogContent class="max-h-[86vh] border border-border !bg-background-solid text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[720px]">
       <DialogHeader>
         <DialogTitle class="flex items-center gap-2">
           <Braces class="h-5 w-5 text-primary" />
diff --git a/apps/desktop/src/components/editor/__tests__/SqlParameterDialog.spec.ts b/apps/desktop/src/components/editor/__tests__/SqlParameterDialog.spec.ts
index de5fd96341..22eff5c24f 100644
--- a/apps/desktop/src/components/editor/__tests__/SqlParameterDialog.spec.ts
+++ b/apps/desktop/src/components/editor/__tests__/SqlParameterDialog.spec.ts
@@ -193,6 +193,17 @@ describe("SqlParameterDialog raw parameter action", () => {
   });
 });
 
+describe("SqlParameterDialog surface", () => {
+  it("keeps the dialog background opaque while a wallpaper is active", async () => {
+    await mountDialog();
+    const content = document.body.querySelector('[data-slot="dialog-content"]');
+    expect(content).not.toBeNull();
+    const classes = content!.className;
+    expect(classes).toContain("bg-background-solid");
+    expect(classes).not.toMatch(/(^|\s)!bg-background(\s|$)/);
+  });
+});
+
 describe("SqlParameterDialog ignore parameter action", () => {
   it("closes the dialog and emits the original SQL without remembering or mutating values", async () => {
     const { state, onExecute } = await mountDialog();
diff --git a/apps/desktop/src/components/grid/GridSnapshotDialog.vue b/apps/desktop/src/components/grid/GridSnapshotDialog.vue
index db10c33fae..e6299b3c72 100644
--- a/apps/desktop/src/components/grid/GridSnapshotDialog.vue
+++ b/apps/desktop/src/components/grid/GridSnapshotDialog.vue
@@ -147,7 +147,7 @@ async function exportSnapshot(kind: "clipboard" | "file") {
 
 <template>
   <Dialog v-model:open="open">
-    <DialogContent class="flex max-h-[calc(var(--dbx-viewport-height)-2rem)] flex-col overflow-hidden border border-border !bg-background text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[980px]">
+    <DialogContent class="flex max-h-[calc(var(--dbx-viewport-height)-2rem)] flex-col overflow-hidden border border-border !bg-background-solid text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[980px]">
       <DialogHeader>
         <DialogTitle class="flex items-center gap-2"><Camera class="h-5 w-5 text-primary" />{{ t("gridSnapshot.title") }}</DialogTitle>
       </DialogHeader>
diff --git a/apps/desktop/src/components/objects/ProcedureExecutionDialog.vue b/apps/desktop/src/components/objects/ProcedureExecutionDialog.vue
index d2c5ab0efd..913f03b751 100644
--- a/apps/desktop/src/components/objects/ProcedureExecutionDialog.vue
+++ b/apps/desktop/src/components/objects/ProcedureExecutionDialog.vue
@@ -144,7 +144,7 @@ function displayParameterDefault(parameter: RoutineParameterValue): string {
 
 <template>
   <Dialog v-model:open="open">
-    <DialogContent class="max-h-[86vh] border border-border !bg-background text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[780px]">
+    <DialogContent class="max-h-[86vh] border border-border !bg-background-solid text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[780px]">
       <DialogHeader>
         <DialogTitle>{{ t("contextMenu.confirmExecuteProcedureTitle") }}</DialogTitle>
       </DialogHeader>
diff --git a/apps/desktop/src/lib/app/__tests__/dialogSurfaceOpacity.spec.ts b/apps/desktop/src/lib/app/__tests__/dialogSurfaceOpacity.spec.ts
new file mode 100644
index 0000000000..9567ac3017
--- /dev/null
+++ b/apps/desktop/src/lib/app/__tests__/dialogSurfaceOpacity.spec.ts
@@ -0,0 +1,36 @@
+import { readFileSync } from "node:fs";
+import { describe, expect, it } from "vitest";
+import { BACKGROUND_IMAGE_SURFACE_VARS } from "@/lib/app/appBackgroundImage";
+
+/**
+ * While a wallpaper is active the app republishes `--background` (and the other
+ * surface tokens) with the configured alpha, so a dialog that paints itself with
+ * `bg-background` turns translucent and its text becomes hard to read. These
+ * dialogs used to override the opaque `bg-popover` surface with `!bg-background`,
+ * so they are pinned to `bg-background-solid` here.
+ */
+const DIALOG_SOURCES = {
+  "codeSnapshot/CodeSnapshotDialog.vue": "../../../components/codeSnapshot/CodeSnapshotDialog.vue",
+  "grid/GridSnapshotDialog.vue": "../../../components/grid/GridSnapshotDialog.vue",
+  "editor/DelimitedListDialog.vue": "../../../components/editor/DelimitedListDialog.vue",
+  "editor/SqlParameterDialog.vue": "../../../components/editor/SqlParameterDialog.vue",
+  "objects/ProcedureExecutionDialog.vue": "../../../components/objects/ProcedureExecutionDialog.vue",
+} as const;
+
+describe("dialog surfaces under a wallpaper", () => {
+  it("keeps --background in the translucent wallpaper surface set", () => {
+    expect(BACKGROUND_IMAGE_SURFACE_VARS).toContain("--background");
+  });
+
+  for (const [label, relativePath] of Object.entries(DIALOG_SOURCES)) {
+    it(`${label} paints an opaque surface`, () => {
+      const source = readFileSync(new URL(relativePath, import.meta.url), "utf8");
+      const dialogContentClasses = Array.from(source.matchAll(/<DialogContent\b[^>]*class="([^"]*)"/g), (match) => match[1]);
+      expect(dialogContentClasses.length).toBeGreaterThan(0);
+      for (const classes of dialogContentClasses) {
+        expect(classes).toContain("bg-background-solid");
+        expect(classes).not.toMatch(/(^|\s)!bg-background(\s|$)/);
+      }
+    });
+  }
+});
diff --git a/apps/desktop/src/styles/__tests__/legacyWebviewFallback.spec.ts b/apps/desktop/src/styles/__tests__/legacyWebviewFallback.spec.ts
index 183e69915f..a27a2e64d5 100644
--- a/apps/desktop/src/styles/__tests__/legacyWebviewFallback.spec.ts
+++ b/apps/desktop/src/styles/__tests__/legacyWebviewFallback.spec.ts
@@ -136,7 +136,7 @@ describe("legacy WebView CSS fallbacks", () => {
   });
 
   it("keeps the code snapshot dialog layout on the global legacy dialog fallbacks", () => {
-    expect(codeSnapshotDialogSource).toContain('class="flex max-h-[calc(var(--dbx-viewport-height)-2rem)] flex-col overflow-hidden border border-border !bg-background text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[860px]"');
+    expect(codeSnapshotDialogSource).toContain('class="flex max-h-[calc(var(--dbx-viewport-height)-2rem)] flex-col overflow-hidden border border-border !bg-background-solid text-foreground shadow-2xl !backdrop-blur-none sm:max-w-[860px]"');
     expect(codeSnapshotDialogSource).not.toContain("dbx-legacy-webview");
     expect(codeSnapshotDialogSource).not.toContain("@media");
     expect(globalsCss).toContain('html.dbx-legacy-webview [data-slot="dialog-content"][class*="sm:max-w-[860px]"]');