feat(talk): add documentation for features of 21.0

Signed-off-by: Dorra Jaouad <dorra.jaoued7@gmail.com>

Author: DorraJaouad

user_manual/talk/advanced_features.rst

@@ -240,6 +240,7 @@ By accepting the invite, conversation will appear in the list as any other one.
    :width: 400px
 
 You can use it further to chat with participants from other federated servers, join calls and use other available Talk features.
+
 Chat summary
 ------------
 
@@ -251,4 +252,13 @@ You can generate it by pressing the button that is visible in chat above the fir
 
 .. image:: images/chat-summary-text.png
    :width: 500px
+
+Meeting scheduling from Talk
+----------------------------
+
+It is possible to schedule a meeting directly from a conversation. The calendar icon in top bar opens a scheduling dialog where you can set the meeting details.
+You can choose to add all participants including email guests, or select specific participants.
+
+.. image:: images/talk-schedule-meeting.png
+   :width: 400px
 

user_manual/talk/images/chat-search-messages-tab.png

@@ -365,6 +365,12 @@ If video from your camera is also available, other participants will see it in a
 .. image:: images/share-screen-with-camera.png
     :width: 700px
 
+You can zoom in and out of the shared screen with mouse wheel, double click or touchpad gestures.
+
+.. image:: images/screenshare-zoom.png
+    :width: 700px
+
+
 Changing view in a call
 -----------------------
 
@@ -394,8 +400,28 @@ The table in the CSV file contains the following columns:
 - **Type**: Indicates whether the participant is a registered user or a guest.
 - **Identifier**: Unique identifier for the participant.
 
+Compact view of navigation bar
+------------------------------
+
+Compact view allows to hide last message preview in the conversation list, providing a more focused interface. 
+You can enable it from the ``Talk settings`` dialog  in ``Appearance`` section.
+
+.. image:: images/talk-compact-view.png
+   :width: 200px
 
 
+Messages search in a conversation
+---------------------------------
+
+In addition to global unified search, you can search for messages within a specific conversation. On the content bar of a conversation, click the search icon to open the search tab.
+
+.. image:: images/chat-search-messages.png
+   :width: 500px
+
+You can customize your search by using filters such as date range, sender, and keywords.
+
+.. image:: images/chat-search-messages-tab.png
+   :width: 500px