✨(back) extract ICS URL property and display in invitation emails

Add visio conference URL support to invitation emails:
- Add url field to EventDetails dataclass
- Extract URL property in ICalendarParser.parse()
- Fix extract_property regex to preserve full URLs (was truncating
  https:// by splitting on colon)
- Add conditional visio section to all 8 email templates
  (invitation, update, cancel, reply — HTML and text)

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

src/backend/core/services/calendar_invitation_service.py

@@ -50,6 +50,7 @@ class EventDetails:
     summary: str
     description: Optional[str]
     location: Optional[str]
+    url: Optional[str]
     dtstart: datetime
     dtend: Optional[datetime]
     organizer_email: str
@@ -95,17 +96,10 @@ class ICalendarParser:
         # Handle multi-line values (lines starting with space/tab are continuations)
         icalendar = re.sub(r"\r?\n[ \t]", "", icalendar)
 
-        pattern = rf"^{property_name}[;:](.+)$"
+        pattern = rf"^{property_name}(;[^:]*)?:(.+)$"
         match = re.search(pattern, icalendar, re.MULTILINE | re.IGNORECASE)
         if match:
-            value = match.group(1)
-            # Remove parameters (everything before the last colon if there are parameters)
-            if ";" in property_name or ":" not in value:
-                return value.strip()
-            # Handle properties with parameters like ORGANIZER;CN=Name:mailto:email
-            if ":" in value:
-                return value.split(":")[-1].strip()
-            return value.strip()
+            return match.group(2).strip()
         return None
 
     @staticmethod
@@ -205,6 +199,7 @@ class ICalendarParser:
             summary = cls.extract_property(vevent_block, "SUMMARY") or "(Sans titre)"
             description = cls.extract_property(vevent_block, "DESCRIPTION")
             location = cls.extract_property(vevent_block, "LOCATION")
+            url = cls.extract_property(vevent_block, "URL")
 
             # Parse dates with timezone support - from VEVENT block only
             dtstart_raw, dtstart_params = cls.extract_property_with_params(
@@ -265,6 +260,7 @@ class ICalendarParser:
                 summary=summary,
                 description=description,
                 location=location,
+                url=url,
                 dtstart=dtstart,
                 dtend=dtend,
                 organizer_email=organizer_email,

src/backend/core/templates/emails/calendar_invitation.html

@@ -119,6 +119,12 @@
                     <td>{{ event.location }}</td>
                 </tr>
                 {% endif %}
+                {% if event.url %}
+                <tr>
+                    <td>Visio</td>
+                    <td><a href="{{ event.url }}" style="color: #0066cc;">{{ event.url }}</a></td>
+                </tr>
+                {% endif %}
                 <tr>
                     <td>Organisateur</td>
                     <td>{{ organizer_display }} &lt;{{ event.organizer_email }}&gt;</td>

src/backend/core/templates/emails/calendar_invitation.txt

@@ -6,6 +6,7 @@ Détails de l'événement
 Titre : {{ event.summary }}
 Quand : {{ start_date }} {{ time_str }}{% if start_date != end_date %} - {{ end_date }}{% endif %}
 {% if event.location %}Lieu : {{ event.location }}
+{% endif %}{% if event.url %}Visio : {{ event.url }}
 {% endif %}Organisateur : {{ organizer_display }} <{{ event.organizer_email }}>
 
 {% if event.description %}

src/backend/core/templates/emails/calendar_invitation_cancel.html

@@ -114,6 +114,12 @@
                     <td>{{ event.location }}</td>
                 </tr>
                 {% endif %}
+                {% if event.url %}
+                <tr>
+                    <td>Visio</td>
+                    <td>{{ event.url }}</td>
+                </tr>
+                {% endif %}
                 <tr>
                     <td>Organisateur</td>
                     <td>{{ organizer_display }} &lt;{{ event.organizer_email }}&gt;</td>

src/backend/core/templates/emails/calendar_invitation_cancel.txt

@@ -6,6 +6,7 @@ Détails de l'événement annulé
 Titre : {{ event.summary }}
 Était prévu le : {{ start_date }} {{ time_str }}{% if start_date != end_date %} - {{ end_date }}{% endif %}
 {% if event.location %}Lieu : {{ event.location }}
+{% endif %}{% if event.url %}Visio : {{ event.url }}
 {% endif %}Organisateur : {{ organizer_display }} <{{ event.organizer_email }}>
 
 Cet événement a été annulé. Vous pouvez le supprimer de votre calendrier en ouvrant le fichier .ics en pièce jointe.

src/backend/core/templates/emails/calendar_invitation_reply.html

@@ -101,6 +101,12 @@
                     <td>{{ event.location }}</td>
                 </tr>
                 {% endif %}
+                {% if event.url %}
+                <tr>
+                    <td>Visio</td>
+                    <td><a href="{{ event.url }}" style="color: #28a745;">{{ event.url }}</a></td>
+                </tr>
+                {% endif %}
                 <tr>
                     <td>Participant</td>
                     <td>{{ attendee_display }} &lt;{{ event.attendee_email }}&gt;</td>

src/backend/core/templates/emails/calendar_invitation_reply.txt

@@ -6,8 +6,8 @@ Détails de l'événement
 Titre : {{ event.summary }}
 Quand : {{ start_date }} {{ time_str }}{% if start_date != end_date %} - {{ end_date }}{% endif %}
 {% if event.location %}Lieu : {{ event.location }}
+{% endif %}{% if event.url %}Visio : {{ event.url }}
 {% endif %}
-
 La réponse du participant a été enregistrée dans le fichier .ics en pièce jointe.
 
 ---

src/backend/core/templates/emails/calendar_invitation_update.html

@@ -124,6 +124,12 @@
                     <td>{{ event.location }}</td>
                 </tr>
                 {% endif %}
+                {% if event.url %}
+                <tr>
+                    <td>Visio</td>
+                    <td><a href="{{ event.url }}" style="color: #e65100;">{{ event.url }}</a></td>
+                </tr>
+                {% endif %}
                 <tr>
                     <td>Organisateur</td>
                     <td>{{ organizer_display }} &lt;{{ event.organizer_email }}&gt;</td>

src/backend/core/templates/emails/calendar_invitation_update.txt

@@ -6,6 +6,7 @@ Détails de l'événement mis à jour
 Titre : {{ event.summary }}
 Quand : {{ start_date }} {{ time_str }}{% if start_date != end_date %} - {{ end_date }}{% endif %}
 {% if event.location %}Lieu : {{ event.location }}
+{% endif %}{% if event.url %}Visio : {{ event.url }}
 {% endif %}Organisateur : {{ organizer_display }} <{{ event.organizer_email }}>
 
 {% if event.description %}