refactor: remove split_pane_manager plugin and harden view handling

- Delete deprecated split_pane_manager command plugin and all related commands
- Introduce new split_pane command structure (untracked replacement)
- Add guard in code_minimap to handle missing active view
- Prevent language detection for non-file buffers in command_helpers

This cleans up legacy split pane logic and improves stability for edge cases.

plugins/code/commands/split_pane/close_split_view.py

@@ -16,6 +16,19 @@ from libs.event_factory import Event_Factory, Code_Event_Types
 
 emit_to: callable = None
 
+def get_source_view(widget):
+    if isinstance(widget, GtkSource.View):
+        return widget
+
+    if isinstance(widget, Gtk.ScrolledWindow):
+        return widget.get_child()
+
+    if isinstance(widget, Gtk.Paned):
+        return get_source_view(widget.get_child1())
+
+    return None
+
+
 def execute(
     source_view,
     char_str,
@@ -39,7 +52,7 @@ def execute(
         remaining    = source_view1
         closing_view = source_view
 
-    remaining_view = remaining.get_child()
+    remaining_view = get_source_view(remaining)
     left           = closing_view.sibling_left
     right          = closing_view.sibling_right
 

plugins/code/commands/split_pane/create_split_view.py

@@ -54,13 +54,24 @@ def execute(
     pane.pack2( scrolled_win2, True, True )
     container.add(pane)
 
-    pane.show_all()
+    def _show(pane, alloc, is_vertical: bool):
+        if is_vertical:
+            pane.set_position(alloc.width  / 2)
+        else:
+            pane.set_position(alloc.height / 2)
+
+        pane.disconnect(pane.show_id)
 
     is_control, is_shift, is_alt = modkeys_states
-    if is_control and is_shift:
+    alloc = container.get_allocation()
+    if char_str == "|":
+        pane.show_id = pane.connect("show", _show, alloc, True)
         pane.set_orientation(Gtk.Orientation.VERTICAL)
-    elif is_control:
+    elif char_str == "\\":
+        pane.show_id = pane.connect("show", _show, alloc, False)
         pane.set_orientation(Gtk.Orientation.HORIZONTAL)
 
-    source_view2.grab_focus()
+    pane.show_all()
+
     source_view2.command.exec("new_file")
+    source_view2.grab_focus()

plugins/code/commands/split_pane/manifest.json

@@ -1,5 +1,5 @@
 {
-    "name": "Split Pane Manager",
+    "name": "Split Pane",
     "author": "ITDominator",
     "version": "0.0.1",
     "support": "",