docs: fix issues from PR review comments

- menus.mdx: add Update() call after adding items to context menu snippet
- application.mdx: fix Emit() signature — remove fabricated bool return
- events-reference.mdx: fix files-dropped JS example to account for
  variadic wrapping (event.data[0] is the files array)
- bridge.mdx: fix progress event example — use variadic args directly
  and destructure event.data array in JS

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/src/content/docs/concepts/bridge.mdx

@@ -538,10 +538,7 @@ func ProcessLargeFile(path string) error {
     for scanner.Scan() {
         lineNum++
         // Emit progress events
-        app.Event.Emit("file-progress", map[string]interface{}{
-            "line": lineNum,
-            "text": scanner.Text(),
-        })
+        app.Event.Emit("file-progress", lineNum, scanner.Text())
     }
     
     return scanner.Err()
@@ -553,8 +550,10 @@ import { Events } from '@wailsio/runtime'
 import { ProcessLargeFile } from './bindings/FileService'
 
 // Listen for progress
+// event.data is an array of the variadic args: [lineNum, text]
 Events.On('file-progress', (event) => {
-    console.log(`Line ${event.data.line}: ${event.data.text}`)
+    const [line, text] = event.data
+    console.log(`Line ${line}: ${text}`)
 })
 
 // Start processing

docs/src/content/docs/guides/events-reference.mdx

@@ -214,7 +214,10 @@ Then listen in JavaScript:
 import { Events } from '@wailsio/runtime';
 
 Events.On('files-dropped', (event) => {
-    event.data.forEach(file => {
+    // EmitEvent is variadic, so event.data is a []any wrapping the args.
+    // The files array is the first element.
+    const files = event.data[0];
+    files.forEach(file => {
         console.log('File dropped:', file);
         handleFileUpload(file);
     });

docs/src/content/docs/guides/menus.mdx

@@ -436,6 +436,12 @@ When creating a custom context menu, you provide a unique identifier (name) that
 ```go
 // Create a context menu with identifier "imageMenu"
 contextMenu := application.NewContextMenu("imageMenu")
+
+// Add items and call Update() to apply changes
+contextMenu.Add("Cut")
+contextMenu.Add("Copy")
+contextMenu.Add("Paste")
+contextMenu.Update()
 ```
 
 The name parameter ("imageMenu" in this example) serves as a unique identifier that will be used to:

docs/src/content/docs/reference/application.mdx

@@ -347,11 +347,9 @@ app.RegisterService(application.NewService(&MyService{}))
 Emits a custom event.
 
 ```go
-func (em *EventManager) Emit(name string, data ...any) bool
+func (em *EventManager) Emit(name string, data ...any)
 ```
 
-**Returns:** `true` if the event was cancelled by a hook.
-
 **Example:**
 
 ```go