Fix copy logs clipboard fallback and simplify SMTP error messages

- Copy logs: fall back to a selectable textarea when clipboard API
  is unavailable instead of showing a generic error
- SMTP errors: show human-readable messages like "Wrong password"
  instead of raw error codes like (535, b'5.7.8 Error: ...')

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: DAdjadj

app/email_notify.py

@@ -48,7 +48,23 @@ def send(subject: str, body: str, raise_on_error: bool = False):
     except Exception as e:
         logger.warning("Failed to send email: %s", e)
         if raise_on_error:
-            raise
+            raise RuntimeError(_friendly_smtp_error(e)) from e
+
+
+def _friendly_smtp_error(e):
+    """Convert SMTP exceptions to human-readable messages."""
+    msg = str(e).lower()
+    if "authentication failed" in msg or "535" in msg:
+        return "Wrong password. Check your app-specific password and try again."
+    if "username and password not accepted" in msg:
+        return "Wrong email or password. Check your credentials and try again."
+    if "connection refused" in msg or "errno 111" in msg:
+        return "Could not connect to the email server. Check your email address."
+    if "timed out" in msg or "timeout" in msg:
+        return "Email server did not respond. Try again in a moment."
+    if "relay" in msg or "sender" in msg:
+        return "Your email provider rejected the message. Make sure the 'send from' address is correct."
+    return f"Email failed: {e}"
 
 
 def send_success(tx_count: int):

app/web/templates/status.html

@@ -123,22 +123,30 @@
   var status = document.getElementById('logs-status');
   btn.textContent = 'Fetching...';
   btn.disabled = true;
+  status.style.display = 'block';
   try {
     var resp = await fetch('/api/logs?lines=200');
     var data = await resp.json();
-    if (data.logs) {
-      await navigator.clipboard.writeText(data.logs);
-      status.style.display = 'block';
-      status.textContent = 'Logs copied to clipboard. Paste them in your support email.';
-      status.style.color = '#10b981';
-      setTimeout(function() { status.style.display = 'none'; }, 5000);
-    } else {
-      status.style.display = 'block';
-      status.textContent = data.error || 'Could not fetch logs.';
+    if (!data.logs) {
+      status.textContent = data.error || 'No logs available.';
       status.style.color = '#ef4444';
+    } else {
+      try {
+        await navigator.clipboard.writeText(data.logs);
+        status.textContent = 'Logs copied to clipboard.';
+        status.style.color = '#10b981';
+      } catch(clipErr) {
+        // Clipboard API may not be available — show logs in a textarea instead
+        var ta = document.createElement('textarea');
+        ta.value = data.logs;
+        ta.style.cssText = 'width:100%;height:120px;margin-top:8px;background:#080b12;color:#94a3b8;border:1px solid #253450;border-radius:6px;font-size:11px;font-family:monospace;padding:8px;';
+        status.textContent = 'Select all and copy:';
+        status.style.color = '#94a3b8';
+        status.parentNode.insertBefore(ta, status.nextSibling);
+        ta.select();
+      }
     }
   } catch(e) {
-    status.style.display = 'block';
     status.textContent = 'Could not fetch logs.';
     status.style.color = '#ef4444';
   }