Add fediverse client identification to posts and timeline

- Add application field to Post model to capture client metadata from API
- Display client info in timeline view after timestamp (e.g. "5 minutes ago via Bifrost")
- Show client information in post details dialog metadata section
- Gracefully handle missing client data by silently omitting when unavailable
- Handle common generic client names (Web, Mobile) with cleaner formatting
- Support client identification for both original posts and reblogs

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/models/post.py

@@ -83,6 +83,9 @@ class Post:
     notification_type: Optional[str] = None  # mention, reblog, favourite, follow, etc.
     notification_account: Optional[str] = None  # account that triggered notification
     
+    # Application metadata (client that posted this)
+    application: Optional[Dict[str, Any]] = None  # {'name': 'ClientName', 'website': 'url'}
+    
     def __post_init__(self):
         if self.media_attachments is None:
             self.media_attachments = []
@@ -174,7 +177,8 @@ class Post:
             emoji_reactions=data.get('emoji_reactions', []),
             expires_at=datetime.fromisoformat(data['expires_at'].replace('Z', '+00:00')) if data.get('expires_at') else None,
             local=data.get('local', True),
-            thread_muted=data.get('thread_muted', False)
+            thread_muted=data.get('thread_muted', False),
+            application=data.get('application')
         )
         
         return post
@@ -268,9 +272,14 @@ class Post:
         content = self.get_display_content()
         relative_time = self.get_relative_time()
         
-        # Include timestamp if available
+        # Include timestamp and client info if available
-        if relative_time:
+        client_info = self.get_client_info()
+        if relative_time and client_info:
+            summary = f"{author}: {content} ({relative_time} {client_info})"
+        elif relative_time:
             summary = f"{author}: {content} ({relative_time})"
+        elif client_info:
+            summary = f"{author}: {content} ({client_info})"
         else:
             summary = f"{author}: {content}"
         
@@ -362,6 +371,25 @@ class Post:
         
         return f"Poll: {options_count} options, {vote_text}, multiple {choice_text} {'allowed' if multiple else 'not allowed'}{status_text}{expiry_text}"
     
+    def get_client_info(self) -> str:
+        """Get client application information for display"""
+        # For reblogs, show the client of the original post
+        target_post = self.reblog if self.reblog else self
+        
+        if target_post.application and target_post.application.get('name'):
+            client_name = target_post.application['name']
+            # Handle common generic names for better user experience
+            if client_name.lower() in ['web', 'mastodon web']:
+                return "via Web"
+            elif client_name.lower() in ['mobile', 'mastodon mobile']:
+                return "via Mobile"
+            else:
+                return f"via {client_name}"
+        
+        # If no application data, silently omit (don't show generic fallback)
+        # This gracefully handles cases where servers don't provide application info
+        return ""
+        
     def to_api_data(self) -> Dict[str, Any]:
         """Convert Post back to API response format"""
         return {
@@ -397,5 +425,6 @@ class Post:
             'emoji_reactions': self.emoji_reactions,
             'expires_at': self.expires_at.isoformat() if self.expires_at else None,
             'local': self.local,
-            'thread_muted': self.thread_muted
+            'thread_muted': self.thread_muted,
+            'application': self.application
         }

src/widgets/post_details_dialog.py

@@ -394,6 +394,11 @@ class PostDetailsDialog(QDialog):
         if hasattr(self.post, "language") and self.post.language:
             metadata_parts.append(f"Language: {self.post.language}")
         
+        # Add client information if available
+        client_info = self.post.get_client_info()
+        if client_info:
+            metadata_parts.append(f"Client: {client_info.replace('via ', '')}")
+        
         if metadata_parts:
             content_parts.append("Post Details:")
             content_parts.extend(metadata_parts)