refactor: use Pango for font scaling instead of CSS classes

- Replace CSS-based zoom (px1-px99 classes) with Pango.FontDescription
- Fix bug in multi-insert: insert at start_itr instead of end_itr
- Add Pango-based font setup for mini-view widget
- Revamp stylesheet with Light Blue-Grey Glass theme

src/core/widgets/code/command_system/commands/zoom_in.py

@@ -6,6 +6,7 @@ import gi
 gi.require_version('GtkSource', '4')
 
 from gi.repository import GtkSource
+from gi.repository import Pango
 
 # Application imports
 
@@ -18,6 +19,9 @@ def execute(
 
     ctx = view.get_style_context()
     if view.zoom_level < 99:
-        ctx.remove_class(f"px{view.zoom_level}")
         view.zoom_level += 1
-        ctx.add_class(f"px{view.zoom_level}")
+
+        font_desc        = \
+            Pango.FontDescription(f"Monospace {view.zoom_level}")
+
+        view.modify_font(font_desc)

src/core/widgets/code/command_system/commands/zoom_out.py

@@ -6,6 +6,7 @@ import gi
 gi.require_version('GtkSource', '4')
 
 from gi.repository import GtkSource
+from gi.repository import Pango
 
 # Application imports
 
@@ -18,6 +19,9 @@ def execute(
 
     ctx = view.get_style_context()
     if view.zoom_level > 1:
-        ctx.remove_class(f"px{view.zoom_level}")
         view.zoom_level -= 1
-        ctx.add_class(f"px{view.zoom_level}")
+
+        font_desc        = \
+            Pango.FontDescription(f"Monospace {view.zoom_level}")
+
+        view.modify_font(font_desc)

src/core/widgets/code/controllers/completion_controller.py

@@ -68,6 +68,8 @@ class CompletionController(ControllerBase):
 
     def provider_process_file_load(self, event: Code_Event_Types.AddedNewFileEvent):
         for provider in self._providers.values():
+            # if provider.get_name() == "Words Completion":
+            #    provider.register(event.file.buffer)
             provider.response_cache.process_file_load(event)
 
     def provider_process_file_close(self, event: Code_Event_Types.RemovedFileEvent):

src/core/widgets/code/controllers/views/states/source_view_multi_insert_state.py

@@ -71,7 +71,7 @@ class SourceViewsMultiInsertState(MarkEventsMixin):
                     end_itr.forward_word_end()
 
                 buffer.delete(start_itr, end_itr)
-                buffer.insert(end_itr, text, -1)
+                buffer.insert(start_itr, text, -1)
 
         buffer.end_user_action()
         buffer.unblock_insert_after_signal()

src/core/widgets/code/mini_view_widget.py

@@ -4,7 +4,7 @@
 import gi
 gi.require_version('GtkSource', '4')
 from gi.repository.GtkSource import Map
-
+from gi.repository import Pango
 
 # Application imports
 
@@ -25,6 +25,7 @@ class MiniViewWidget(Map):
         ctx.add_class("mini-view")
 
         self.set_hexpand(False)
+        self._set_font_desc()
 
     def _setup_signals(self):
         ...
@@ -35,5 +36,13 @@ class MiniViewWidget(Map):
     def _load_widgets(self):
         ...
 
+    def _set_font_desc(self):
+        default_font = 'Monospace 1'
+        desc         = Pango.FontDescription(default_font)
+
+        desc.set_size(Pango.SCALE) # Set size to 1pt
+        desc.set_family('BuilderBlocks,' + desc.get_family())
+        self.set_property('font-desc', desc)
+
     def set_smini_view(self, source_view):
         self.set_view(source_view)

src/core/widgets/code/source_view.py

@@ -39,7 +39,6 @@ class SourceView(GtkSource.View, SourceViewDnDMixin):
         ctx             = self.get_style_context()
 
         ctx.add_class("source-view")
-        ctx.add_class(f"px{self.zoom_level}")
 
         self.set_vexpand(True)
         self.set_bottom_margin(800)