Bugfix: MCP open_under_cursor works on the Network view again

`openCursorItem` in `FilePane.svelte` only read from `briefList` / `fullList`, so on the Network volume — where the cursor lives in `NetworkBrowser` (host list) or `ShareBrowser` (share list) — it always threw "No entry under cursor". Regression from the May 2026 MCP ack-contract refactor (e12285d), which replaced the keyboard-event dispatch with a direct `handleNavigate(entry)` call that bypassed the network-view branch in `handleKeyDown`.

- `NetworkBrowser`, `ShareBrowser`: new `openCursorItem()` method runs the same action Enter triggers (open host / open share / "Connect to server…").
- `NetworkMountView`: forwards to the active child (`shareBrowserRef` or `networkBrowserRef`).
- `FilePane.openCursorItem`: routes to `networkMountViewRef.openCursorItem()` when `isNetworkView`, falls through to the file-list path otherwise.

This unblocks the 3 SMB E2E tests on Linux that were red since the refactor (`smb.spec.ts:220`, `:240`, `:480`). Verified on Linux Docker (157/157) and macOS (145/145).

Author: vdavid

apps/desktop/src/lib/file-explorer/network/NetworkBrowser.svelte

@@ -205,6 +205,16 @@
         return hosts.findIndex((h) => h.name.toLowerCase() === name.toLowerCase())
     }
 
+    /** Opens the host (or "Connect to server…" row) under the cursor — same action Enter triggers. */
+    // noinspection JSUnusedGlobalSymbols -- used dynamically by NetworkMountView / MCP
+    export function openCursorItem(): void {
+        if (isCursorOnConnectRow) {
+            onConnectToServer?.()
+        } else if (cursorIndex >= 0 && cursorIndex < hosts.length) {
+            onHostSelect?.(hosts[cursorIndex])
+        }
+    }
+
     /** Check for ⌘R refresh shortcut */
     function isRefreshShortcut(e: KeyboardEvent): boolean {
         return e.key === 'r' && e.metaKey && !e.shiftKey && !e.altKey && !e.ctrlKey

apps/desktop/src/lib/file-explorer/network/ShareBrowser.svelte

@@ -317,6 +317,14 @@
         return sortedShares.findIndex((s) => s.name.toLowerCase() === name.toLowerCase())
     }
 
+    /** Opens the share under the cursor — same action Enter triggers. */
+    // noinspection JSUnusedGlobalSymbols -- used dynamically by NetworkMountView / MCP
+    export function openCursorItem(): void {
+        if (cursorIndex >= 0 && cursorIndex < sortedShares.length) {
+            onShareSelect?.(sortedShares[cursorIndex], authenticatedCredentials)
+        }
+    }
+
     function handleShareClick(index: number) {
         cursorIndex = index
     }

apps/desktop/src/lib/file-explorer/pane/FilePane.svelte

@@ -1646,6 +1646,12 @@
      */
     // noinspection JSUnusedGlobalSymbols -- Used dynamically by DualPaneExplorer/MCP
     export async function openCursorItem(): Promise<void> {
+        if (isNetworkView) {
+            // Network view: cursor lives in NetworkBrowser/ShareBrowser, not the file list.
+            // Delegate to NetworkMountView, which forwards to whichever child is active.
+            networkMountViewRef?.openCursorItem()
+            return
+        }
         const entry = getEntryUnderCursor()
         if (!entry) {
             throw new Error('No entry under cursor')

apps/desktop/src/lib/file-explorer/pane/NetworkMountView.svelte

@@ -184,6 +184,16 @@
         return networkBrowserRef?.findItemIndex(name) ?? -1
     }
 
+    /** Opens the host or share under the cursor — same action Enter triggers. */
+    // noinspection JSUnusedGlobalSymbols -- used dynamically by FilePane / MCP
+    export function openCursorItem(): void {
+        if (currentNetworkHost) {
+            shareBrowserRef?.openCursorItem()
+        } else {
+            networkBrowserRef?.openCursorItem()
+        }
+    }
+
     /** Refresh network hosts (used by ⌘R shortcut). */
     export function refreshNetworkHosts() {
         networkBrowserRef?.refresh()

apps/desktop/src/lib/file-explorer/pane/types.ts

@@ -100,6 +100,7 @@ export interface BrowserAPI {
   handleKeyDown(e: KeyboardEvent): boolean
   setCursorIndex(index: number): void
   findItemIndex(name: string): number
+  openCursorItem(): void
 }
 
 /** Typed interface for NetworkBrowser's exported methods (extends BrowserAPI with refresh). */
@@ -112,6 +113,7 @@ export interface NetworkMountViewAPI {
   handleKeyDown(e: KeyboardEvent): void
   setCursorIndex(index: number): void
   findItemIndex(name: string): number
+  openCursorItem(): void
   refreshNetworkHosts(): void
   setNetworkHost(host: NetworkHost | null): void
 }