feat(forum): email + visual highlight for @mentions

- parse_mentions_and_notify now sends email to mentioned user
  (separate from forum subscription emails — fires on every mention)
- parse_forum_markdown accepts current_user_name; mentions matching
  the viewer get extra .forum-mention-self class
- topic.html passes current_user.name to filter; .forum-mention-self
  styled with amber background + bold + ring

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

templates/forum/topic.html

@@ -200,6 +200,13 @@
         font-weight: 500;
     }
 
+    .forum-mention-self {
+        background: #fde68a;
+        color: #78350f;
+        font-weight: 700;
+        box-shadow: 0 0 0 1px #f59e0b;
+    }
+
     /* User stats tooltip */
     .user-stats-trigger {
         cursor: pointer;
@@ -1105,7 +1112,7 @@
         </button>
     </div>
 
-    <div class="topic-content" id="topicContent">{{ topic.content|forum_markdown }}</div>
+    <div class="topic-content" id="topicContent">{{ topic.content|forum_markdown(current_user.name if current_user.is_authenticated else None) }}</div>
 
     <!-- Reactions bar for topic -->
     <div class="reactions-bar" id="topicReactions" data-content-type="topic" data-content-id="{{ topic.id }}">
@@ -1235,7 +1242,7 @@
             {% if reply.is_deleted %}
             <div class="reply-content deleted-notice">[Ta odpowiedź została usunięta]</div>
             {% else %}
-            <div class="reply-content">{{ reply.content|forum_markdown }}</div>
+            <div class="reply-content">{{ reply.content|forum_markdown(current_user.name if current_user.is_authenticated else None) }}</div>
 
             {% if reply.attachments %}
             <div class="reply-attachments-container">

utils/markdown.py

@@ -19,7 +19,7 @@ def _autolink(text):
     )
 
 
-def parse_forum_markdown(text):
+def parse_forum_markdown(text, current_user_name=None):
     """
     Convert markdown text to safe HTML.
 
@@ -81,12 +81,18 @@ def parse_forum_markdown(text):
         text
     )
 
-    # @mentions - highlight them
-    text = re.sub(
-        r'@([\w.\-]+)',
-        r'<span class="forum-mention">@\1</span>',
-        text
-    )
+    # @mentions - highlight them; mark self-mentions with extra class
+    self_variants = set()
+    if current_user_name:
+        norm = current_user_name.strip().lower()
+        self_variants = {norm.replace(' ', '.'), norm.replace(' ', '_'), norm.replace(' ', '')}
+
+    def _render_mention(m):
+        handle = m.group(1).lower()
+        cls = 'forum-mention forum-mention-self' if handle in self_variants else 'forum-mention'
+        return f'<span class="{cls}">@{m.group(1)}</span>'
+
+    text = re.sub(r'@([\w.\-]+)', _render_mention, text)
 
     # Now process block structure (lists, quotes, paragraphs)
     lines = text.split('\n')

utils/notifications.py

@@ -621,6 +621,7 @@ def parse_mentions_and_notify(content, author_id, author_name, topic_id, content
 
             if user:
                 mentioned_user_ids.append(user.id)
+                action_url = f'/forum/{topic_id}{"#reply-" + str(content_id) if content_type == "reply" else ""}'
                 create_notification(
                     user_id=user.id,
                     title=f"@{author_name} wspomniał o Tobie",
@@ -628,9 +629,53 @@ def parse_mentions_and_notify(content, author_id, author_name, topic_id, content
                     notification_type='message',
                     related_type=f'forum_{content_type}',
                     related_id=content_id,
-                    action_url=f'/forum/{topic_id}{"#reply-" + str(content_id) if content_type == "reply" else ""}'
+                    action_url=action_url
                 )
 
+                # Send email notification to mentioned user
+                try:
+                    from email_service import send_email, _email_v3_wrap
+                    base_url = "https://nordabiznes.pl"
+                    full_url = base_url + action_url
+                    preview = (content[:200] + '...') if len(content) > 200 else content
+                    where = 'odpowiedzi' if content_type == 'reply' else 'temacie'
+                    subject = f"{author_name} wspomniał o Tobie na forum"
+                    body_text = f"""{author_name} wspomniał o Tobie w {where} na forum Norda Biznes.
+
+"{preview}"
+
+Zobacz: {full_url}
+
+---
+Norda Biznes Partner - https://nordabiznes.pl
+"""
+                    html_content = f'''
+    <p style="margin:0 0 16px; color:#1e293b; font-size:16px;">Cześć <strong>{user.name or ''}</strong>!</p>
+    <p style="margin:0 0 24px; color:#475569; font-size:15px; line-height:1.5;"><strong>{author_name}</strong> wspomniał o Tobie w {where} na forum:</p>
+
+    <table width="100%" cellpadding="0" cellspacing="0" style="background:#fef3c7; border-left: 4px solid #f59e0b; border-radius: 0 8px 8px 0; margin-bottom:28px;">
+    <tr><td style="padding: 16px 20px;">
+        <p style="margin:0; color:#475569; font-size:14px; font-style:italic; line-height:1.6;">{preview}</p>
+    </td></tr>
+    </table>
+
+    <table width="100%" cellpadding="0" cellspacing="0" style="margin-bottom:20px;">
+    <tr><td align="center" style="padding: 8px 0;">
+        <a href="{full_url}" style="display:inline-block; padding:16px 40px; background: linear-gradient(135deg, #1e3a8a, #172554); color:#ffffff; text-decoration:none; border-radius:8px; font-size:15px; font-weight:600;">Zobacz na forum &rarr;</a>
+    </td></tr>
+    </table>'''
+                    body_html = _email_v3_wrap('Wspomniano o Tobie', 'Norda Biznes Partner', html_content)
+                    send_email(
+                        to=[user.email],
+                        subject=subject,
+                        body_text=body_text,
+                        body_html=body_html,
+                        email_type='forum_mention',
+                        recipient_name=user.name or ''
+                    )
+                except Exception as e:
+                    logger.error(f"Failed to send mention email to {user.email}: {e}")
+
         return mentioned_user_ids
 
     except Exception as e: