feat: add bulk email copy for selected members (#230)

Copy selected members' emails to clipboard in 'First Last <email>' format

assets/js/app.js

@@ -27,6 +27,33 @@ let csrfToken = document.querySelector("meta[name='csrf-token']").getAttribute("
 // Hooks for LiveView components
 let Hooks = {}
 
+// CopyToClipboard hook: Copies text to clipboard when triggered by server event
+Hooks.CopyToClipboard = {
+  mounted() {
+    this.handleEvent("copy_to_clipboard", ({text}) => {
+      if (navigator.clipboard) {
+        navigator.clipboard.writeText(text).catch(err => {
+          console.error("Clipboard write failed:", err)
+        })
+      } else {
+        // Fallback for older browsers
+        const textArea = document.createElement("textarea")
+        textArea.value = text
+        textArea.style.position = "fixed"
+        textArea.style.left = "-999999px"
+        document.body.appendChild(textArea)
+        textArea.select()
+        try {
+          document.execCommand("copy")
+        } catch (err) {
+          console.error("Fallback clipboard copy failed:", err)
+        }
+        document.body.removeChild(textArea)
+      }
+    })
+  }
+}
+
 // ComboBox hook: Prevents form submission when Enter is pressed in dropdown
 Hooks.ComboBox = {
   mounted() {