Fix broken application.app.controller references in Bluesky buffers

application.app was never set anywhere - application.py is just a
constants module. Every call to view_chat(), on_new_chat(),
view_conversation(), on_reposts(), and on_likes() crashed with
AttributeError, silently swallowed by get_event's except clause.

Fix: store controller reference on each buffer during create_buffer()
in mainController, then use self.controller instead of the broken
application.app.controller pattern throughout all Bluesky buffer and
dialog code.

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

src/controller/blueski/messages.py

@@ -317,8 +317,9 @@ def _extract_post_view_data(session: Any, item: Any) -> dict[str, Any] | None:
 
 
 class viewPost(base_messages.basicMessage):
-    def __init__(self, session: Any, item: Any):
+    def __init__(self, session: Any, item: Any, controller: Any = None):
         self.session = session
+        self.controller = controller
         data = _extract_post_view_data(session, item)
         if not data:
             output.speak(_("No post available to view."), True)
@@ -362,11 +363,10 @@ class viewPost(base_messages.basicMessage):
             output.speak(_("Link copied to clipboard."))
 
     def on_reposts(self, *args, **kwargs):
-        if not self.post_uri:
+        if not self.post_uri or not self.controller:
             return
         try:
-            import application
-            controller = application.app.controller
+            controller = self.controller
             account_name = self.session.get_name()
             list_name = f"{self.post_uri}-reposts"
             existing = controller.search_buffer(list_name, account_name)
@@ -391,11 +391,10 @@ class viewPost(base_messages.basicMessage):
             pass
 
     def on_likes(self, *args, **kwargs):
-        if not self.post_uri:
+        if not self.post_uri or not self.controller:
             return
         try:
-            import application
-            controller = application.app.controller
+            controller = self.controller
             account_name = self.session.get_name()
             list_name = f"{self.post_uri}-likes"
             existing = controller.search_buffer(list_name, account_name)

src/controller/buffers/blueski/base.py

@@ -530,7 +530,7 @@ class BaseBuffer(base.Buffer):
             pub.sendMessage("execute-action", action="user_details")
             return
         try:
-            blueski_messages.viewPost(self.session, item)
+            blueski_messages.viewPost(self.session, item, controller=getattr(self, "controller", None))
         except Exception as e:
             log.error("Error opening Bluesky post viewer: %s", e)
 
@@ -572,9 +572,8 @@ class BaseBuffer(base.Buffer):
              res = api.chat.bsky.convo.get_convo_for_members({"members": [did]})
              convo_id = res.convo.id
              
-             import application
              title = _("Chat: {0}").format(handle)
-             application.app.controller.create_buffer(
+             self.controller.create_buffer(
                  buffer_type="chat_messages",
                  session_type="blueski",
                  buffer_title=title,
@@ -830,8 +829,7 @@ class BaseBuffer(base.Buffer):
          uri = item.get("uri") if isinstance(item, dict) else getattr(item, "uri", None)
          if not uri: return
          
-         import application
-         controller = application.app.controller
+         controller = self.controller
 
          details = self.get_selected_item_author_details()
          handle = "Unknown"

src/controller/buffers/blueski/chat.py

@@ -167,8 +167,7 @@ class ConversationListBuffer(BaseBuffer):
                         user_handle = getattr(profile, "handle", None) or (profile.get("handle") if isinstance(profile, dict) else None) or handle
                         title = _("Chat: {0}").format(user_handle)
                         # Create the buffer under direct_messages node
-                        import application
-                        wx.CallAfter(self._create_chat_buffer, application.app.controller, title, convo_id)
+                        wx.CallAfter(self._create_chat_buffer, self.controller, title, convo_id)
                         # Refresh conversation list
                         wx.CallAfter(self.start_stream, True, False)
                     except Exception:
@@ -340,8 +339,7 @@ class ConversationListBuffer(BaseBuffer):
 
         title = _("Chat: {0}").format(names)
 
-        import application
-        self._create_chat_buffer(application.app.controller, title, convo_id)
+        self._create_chat_buffer(self.controller, title, convo_id)
 
     def _create_chat_buffer(self, controller, title, convo_id):
         """Create a chat buffer under the direct_messages node, avoiding duplicates."""

src/controller/mainController.py

@@ -436,6 +436,7 @@ class Controller(object):
                 kwargs["parent"] = self.view.nb # self.view.nb is the wx.Treebook
 
             buffer = buffer_panel_class(**kwargs) # This is the wx.Panel instance
+            buffer.controller = self
 
             if start:
                 try: