feat(desktop): rich context menu — copy link, image, spellcheck

Replaces the hardcoded Copy/Paste/Select All menu with one driven by
ContextMenuParams: link items (Open in Browser, Copy Link Address),
image items (Copy Image, Save Image As), spellcheck suggestions, and
proper Cut/Copy/Paste in editable inputs. Both the main window and
the browser webview menus go through the shared helper.

MarkdownLink (web branch) now wraps its Pressable+Text in a real
<a href> with `display: contents` so Electron exposes linkURL on
right-click. Native branch is untouched.

packages/app/src/components/message.tsx

@@ -908,17 +908,29 @@ function MarkdownLink({
   }
 
   return (
-    <Pressable
-      accessibilityRole="link"
-      onPress={handlePress}
-      onHoverIn={handleHoverIn}
-      onHoverOut={handleHoverOut}
-    >
-      <Text style={hoveredTextStyle}>{children}</Text>
-    </Pressable>
+    <a href={href} onClick={preventAnchorNavigation} style={MARKDOWN_LINK_ANCHOR_STYLE}>
+      <Pressable
+        accessibilityRole="link"
+        onPress={handlePress}
+        onHoverIn={handleHoverIn}
+        onHoverOut={handleHoverOut}
+      >
+        <Text style={hoveredTextStyle}>{children}</Text>
+      </Pressable>
+    </a>
   );
 }
 
+const MARKDOWN_LINK_ANCHOR_STYLE: React.CSSProperties = {
+  display: "contents",
+  color: "inherit",
+  textDecoration: "none",
+};
+
+function preventAnchorNavigation(event: React.MouseEvent<HTMLAnchorElement>): void {
+  event.preventDefault();
+}
+
 function getInlineCodeAutoLinkUrl(
   markdownParser: ReturnType<typeof MarkdownIt>,
   content: string,

packages/desktop/src/main.ts

@@ -23,6 +23,7 @@ import {
   setupWindowResizeEvents,
   setupDefaultContextMenu,
   setupDragDropPrevention,
+  buildStandardContextMenuItems,
 } from "./window/window-manager.js";
 import { registerDialogHandlers } from "./features/dialogs.js";
 import {
@@ -150,10 +151,7 @@ function showBrowserWebviewContextMenu(
   params: Electron.ContextMenuParams,
 ): void {
   const menu = Menu.buildFromTemplate([
-    { role: "copy", enabled: params.selectionText.length > 0 },
-    { role: "paste" },
-    { type: "separator" },
-    { role: "selectAll" },
+    ...buildStandardContextMenuItems(contents, params),
     ...(app.isPackaged
       ? []
       : [

packages/desktop/src/window/window-manager.ts

@@ -1,4 +1,14 @@
-import { app, BrowserWindow, Menu, ipcMain, nativeTheme } from "electron";
+import {
+  app,
+  BrowserWindow,
+  Menu,
+  type MenuItemConstructorOptions,
+  type WebContents,
+  clipboard,
+  ipcMain,
+  nativeTheme,
+  shell,
+} from "electron";
 
 export function readBadgeCount(input: unknown): number {
   if (typeof input !== "number" || !Number.isSafeInteger(input) || input < 0) {
@@ -272,14 +282,76 @@ export function setupDarwinPaintRefresh(win: BrowserWindow): void {
   });
 }
 
+export function buildStandardContextMenuItems(
+  contents: WebContents,
+  params: Electron.ContextMenuParams,
+): MenuItemConstructorOptions[] {
+  const items: MenuItemConstructorOptions[] = [];
+
+  if (params.misspelledWord) {
+    if (params.dictionarySuggestions.length > 0) {
+      for (const suggestion of params.dictionarySuggestions) {
+        items.push({
+          label: suggestion,
+          click: () => contents.replaceMisspelling(suggestion),
+        });
+      }
+    } else {
+      items.push({ label: "No suggestions", enabled: false });
+    }
+    items.push({ type: "separator" });
+    items.push({
+      label: "Add to Dictionary",
+      click: () => contents.session.addWordToSpellCheckerDictionary(params.misspelledWord),
+    });
+    items.push({ type: "separator" });
+  }
+
+  if (params.linkURL && /^https?:/i.test(params.linkURL)) {
+    items.push({
+      label: "Open Link in Browser",
+      click: () => {
+        void shell.openExternal(params.linkURL);
+      },
+    });
+    items.push({
+      label: "Copy Link Address",
+      click: () => clipboard.writeText(params.linkURL),
+    });
+    items.push({ type: "separator" });
+  }
+
+  if (params.hasImageContents && params.srcURL) {
+    items.push({
+      label: "Copy Image",
+      click: () => contents.copyImageAt(params.x, params.y),
+    });
+    items.push({
+      label: "Save Image As…",
+      click: () => contents.downloadURL(params.srcURL),
+    });
+    items.push({ type: "separator" });
+  }
+
+  if (params.isEditable) {
+    items.push({ role: "cut", enabled: params.editFlags.canCut });
+    items.push({ role: "copy", enabled: params.editFlags.canCopy });
+    items.push({ role: "paste", enabled: params.editFlags.canPaste });
+    items.push({ type: "separator" });
+    items.push({ role: "selectAll" });
+  } else {
+    items.push({ role: "copy", enabled: params.selectionText.length > 0 });
+    items.push({ role: "paste" });
+    items.push({ type: "separator" });
+    items.push({ role: "selectAll" });
+  }
+
+  return items;
+}
+
 export function setupDefaultContextMenu(win: BrowserWindow): void {
   win.webContents.on("context-menu", (_event, params) => {
-    const menu = Menu.buildFromTemplate([
-      { role: "copy", enabled: params.selectionText.length > 0 },
-      { role: "paste" },
-      { type: "separator" },
-      { role: "selectAll" },
-    ]);
+    const menu = Menu.buildFromTemplate(buildStandardContextMenuItems(win.webContents, params));
     menu.popup({ window: win });
   });
 }