feat(forum): beautify Google Maps URLs + fix edit/quote raw content

Google Maps URLs can be 800+ chars of tracking data that poisoned the
forum UI. Extract the place name from /maps/place/NAME/ (or fall back
to coordinates) and render as '📍 Name'. Full URL remains in the href.

Two secondary fixes:

- Edit/quote modals were reading .innerText of the rendered reply,
  which baked the current render (including any stale/broken HTML from
  older bad renders) back into the textarea. Switched to emitting the
  raw DB content via {{ content|tojson }} so what you edit is what you
  wrote.

- @mention regex was matching '@54.1234' inside Maps URLs and similar.
  Tightened to require a letter start and non-slash/non-word lookbehind
  so coords and email-style strings pass through untouched.

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

templates/forum/topic.html

@@ -1154,7 +1154,7 @@
     {% if not topic.is_locked %}
     <div class="user-actions">
         {% if topic.author_id == current_user.id or current_user.can_moderate_forum() %}
-        <button type="button" class="action-btn" onclick="openEditModal('topic', {{ topic.id }}, document.getElementById('topicContent').innerText)">
+        <button type="button" class="action-btn" onclick="openEditModal('topic', {{ topic.id }}, {{ topic.content|tojson }})">
             <svg fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24"><path d="M11 4H4a2 2 0 00-2 2v14a2 2 0 002 2h14a2 2 0 002-2v-7"/><path d="M18.5 2.5a2.121 2.121 0 013 3L12 15l-4 1 1-4 9.5-9.5z"/></svg>
             Edytuj
         </button>
@@ -1223,7 +1223,7 @@
                     <button type="button" class="admin-btn admin-btn-sm" onclick="toggleSolution({{ reply.id }})" title="{% if reply.is_solution %}Usuń oznaczenie{% else %}Oznacz jako rozwiązanie{% endif %}">
                         ✓
                     </button>
-                    <button type="button" class="admin-btn admin-btn-sm" onclick="openEditModal('reply', {{ reply.id }}, document.querySelector('#reply-{{ reply.id }} .reply-content').innerText)">
+                    <button type="button" class="admin-btn admin-btn-sm" onclick="openEditModal('reply', {{ reply.id }}, {{ reply.content|tojson }})">
                         <svg fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="14" height="14"><path d="M11 4H4a2 2 0 00-2 2v14a2 2 0 002 2h14a2 2 0 002-2v-7"/><path d="M18.5 2.5a2.121 2.121 0 013 3L12 15l-4 1 1-4 9.5-9.5z"/></svg>
                     </button>
                     {% if reply.is_deleted %}
@@ -1301,7 +1301,7 @@
             {% if not topic.is_locked %}
             <div class="user-actions">
                 {% if reply.author_id == current_user.id %}
-                <button type="button" class="action-btn" onclick="openEditModal('reply', {{ reply.id }}, document.querySelector('#reply-{{ reply.id }} .reply-content').innerText)">
+                <button type="button" class="action-btn" onclick="openEditModal('reply', {{ reply.id }}, {{ reply.content|tojson }})">
                     <svg fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="14" height="14"><path d="M11 4H4a2 2 0 00-2 2v14a2 2 0 002 2h14a2 2 0 002-2v-7"/><path d="M18.5 2.5a2.121 2.121 0 013 3L12 15l-4 1 1-4 9.5-9.5z"/></svg>
                     Edytuj
                 </button>
@@ -1310,7 +1310,7 @@
                     Usuń
                 </button>
                 {% endif %}
-                <button type="button" class="action-btn" onclick="quoteReply('{{ reply.author.name or reply.author.email.split('@')[0] }}', document.querySelector('#reply-{{ reply.id }} .reply-content').innerText)">
+                <button type="button" class="action-btn" onclick="quoteReply('{{ reply.author.name or reply.author.email.split('@')[0] }}', {{ reply.content|tojson }})">
                     <svg fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="14" height="14"><path d="M21 11.5a8.38 8.38 0 0 1-.9 3.8 8.5 8.5 0 0 1-7.6 4.7 8.38 8.38 0 0 1-3.8-.9L3 21l1.9-5.7a8.38 8.38 0 0 1-.9-3.8 8.5 8.5 0 0 1 4.7-7.6 8.38 8.38 0 0 1 3.8-.9h.5a8.48 8.48 0 0 1 8 8v.5z"/></svg>
                     Cytuj
                 </button>

utils/markdown.py

@@ -7,16 +7,37 @@ Supports: bold, italic, code, links, auto-links, lists, quotes, @mentions
 """
 
 import re
+import urllib.parse
 from markupsafe import Markup, escape
 
 
+def _link_display(url):
+    """Shorten a URL to a human-friendly label while keeping the full href.
+
+    Google Maps URLs are especially unreadable — a single place link can be
+    800 characters of tracking data. Extract the place name (or coordinates)
+    and render it as `📍 Name` instead.
+    """
+    if 'google.' in url and '/maps/' in url:
+        m = re.search(r'/maps/place/([^/@?]+)', url)
+        if m:
+            name = urllib.parse.unquote(m.group(1)).replace('+', ' ').strip()
+            if name:
+                return f'📍 {name}'
+        m = re.search(r'@(-?\d+\.\d+),(-?\d+\.\d+)', url)
+        if m:
+            return f'📍 Mapa ({m.group(1)}, {m.group(2)})'
+        return '📍 Google Maps'
+    return url
+
+
 def _autolink(text):
     """Convert bare URLs to clickable links. Works on escaped text before HTML wrapping."""
-    return re.sub(
-        r'https?://[^\s<]+',
-        lambda m: f'<a href="{m.group(0)}" target="_blank" rel="noopener noreferrer" class="forum-link">{m.group(0)}</a>',
-        text
-    )
+    def wrap(m):
+        url = m.group(0)
+        display = _link_display(url)
+        return f'<a href="{url}" target="_blank" rel="noopener noreferrer" class="forum-link">{display}</a>'
+    return re.sub(r'https?://[^\s<]+', wrap, text)
 
 
 def parse_forum_markdown(text, current_user_name=None):
@@ -77,12 +98,14 @@ def parse_forum_markdown(text, current_user_name=None):
 
     text = re.sub(r'\[([^\]]+)\]\(([^)]+)\)', safe_link, text)
 
-    # Auto-link bare URLs (after [text](url) to avoid doubling)
-    text = re.sub(
-        r'(?<!href=")(?<!">)https?://[^\s<]+',
-        lambda m: f'<a href="{m.group(0)}" target="_blank" rel="noopener noreferrer" class="forum-link">{m.group(0)}</a>',
-        text
-    )
+    # Auto-link bare URLs (after [text](url) to avoid doubling).
+    # Beautify Google Maps URLs via _link_display so the visible label is
+    # a pin + place name instead of an 800-char tracking URL.
+    def _wrap_autolink(m):
+        url = m.group(0)
+        display = _link_display(url)
+        return f'<a href="{url}" target="_blank" rel="noopener noreferrer" class="forum-link">{display}</a>'
+    text = re.sub(r'(?<!href=")(?<!">)https?://[^\s<]+', _wrap_autolink, text)
 
     # @mentions - highlight them; mark self-mentions with extra class
     self_variants = set()
@@ -95,7 +118,10 @@ def parse_forum_markdown(text, current_user_name=None):
         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)
+    # Mentions must start with a letter and not be preceded by `/` or another
+    # word char — this prevents matching `@54.123` from Google Maps URLs or
+    # `email@host` style strings that happen to land in plaintext.
+    text = re.sub(r'(?<![/\w])@([a-zA-Z][\w.\-]*)', _render_mention, text)
 
     # Now process block structure (lists, quotes, paragraphs)
     lines = text.split('\n')