feat(grid): open cell http urls from hover overlay

apps/desktop/src/lib/dataGrid/canvasDataGridRenderer.ts

@@ -198,14 +198,14 @@ export function fitCanvasText(ctx: CanvasRenderingContext2D, text: string, maxWi
   return result;
 }
 
-export function canvasDataGridActionReservedWidth(canQuickDownload: boolean, canNavigateForeignKey = false, showCellDetail = true): number {
-  const overlayWidth = canvasDataGridActionOverlayWidth(canQuickDownload, canNavigateForeignKey, showCellDetail);
+export function canvasDataGridActionReservedWidth(canQuickDownload: boolean, canNavigateForeignKey = false, showCellDetail = true, canOpenExternalUrl = false): number {
+  const overlayWidth = canvasDataGridActionOverlayWidth(canQuickDownload, canNavigateForeignKey, showCellDetail, canOpenExternalUrl);
   return overlayWidth > 0 ? overlayWidth + 6 : 0;
 }
 
 /** 悬浮按钮组宽度：每个已启用按钮 20px + 2px 间距。 */
-export function canvasDataGridActionOverlayWidth(canQuickDownload: boolean, canNavigateForeignKey = false, showCellDetail = true): number {
-  return (showCellDetail ? 22 : 0) + (canQuickDownload ? 22 : 0) + (canNavigateForeignKey ? 22 : 0);
+export function canvasDataGridActionOverlayWidth(canQuickDownload: boolean, canNavigateForeignKey = false, showCellDetail = true, canOpenExternalUrl = false): number {
+  return (showCellDetail ? 22 : 0) + (canQuickDownload ? 22 : 0) + (canNavigateForeignKey ? 22 : 0) + (canOpenExternalUrl ? 22 : 0);
 }
 
 export function resolveCanvasCellTextLayout(options: { drawX: number; colWidth: number; dpr: number; isRightAlign: boolean; reservedWidth?: number }): { textAnchorX: number; maxWidth: number } {

apps/desktop/src/lib/dataGrid/cellExternalUrl.ts

@@ -0,0 +1,18 @@
+import type { CellValue } from "@/lib/dataGrid/cellValue";
+
+/** Return a browser-safe external URL only when the whole cell is an HTTP(S) URL. */
+export function cellExternalUrl(value: CellValue | unknown): string | null {
+  if (typeof value !== "string") return null;
+  const text = value.trim();
+  if (!text) return null;
+
+  let parsed: URL;
+  try {
+    parsed = new URL(text);
+  } catch {
+    return null;
+  }
+
+  if (parsed.protocol !== "http:" && parsed.protocol !== "https:") return null;
+  return text;
+}