fix(gui): Resolve MiniMax compression error and fix Markdown table rendering

- Correctly route 'minimax' provider in run_discussion_compression.
- Fix MiniMax base URL to api.minimax.io to match main sender.
- Refactor read-mode discussion entries to always use a scrollable child with auto-resize.
- Remove redundant text wrapping that caused Markdown tables to squash vertically.
- Clean up duplicate separators in discussion hub.

src/gui_2.py

@@ -3189,8 +3189,6 @@ def render_discussion_entry(app: App, entry: dict, index: int) -> None:
   draw_list.add_rect_filled(p_min, p_max, imgui.get_color_u32(bg_col), 4.0)
   draw_list.channels_merge()
   imgui.separator()
-  imgui.separator()
-  imgui.separator()
 
 def render_discussion_entry_read_mode(app: App, entry: dict, index: int) -> None:
  content = entry["content"]
@@ -3212,11 +3210,11 @@ def render_discussion_entry_read_mode(app: App, entry: dict, index: int) -> None
  pattern = re.compile(r"\[Definition: (.*?) from (.*?) \(line (\d+)\)\](\s+```[\s\S]*?```)?")
  matches, is_nerv = list(pattern.finditer(content)), theme.is_nerv_active()
  if not matches:
-  with theme.ai_text_style():
-   markdown_helper.render(content, context_id=f'disc_{index}')
+  with imscope.child(f"read_content_{index}", size_x=0, size_y=0, flags=imgui.WindowFlags_.no_scroll_with_mouse | imgui.WindowFlags_.always_auto_resize):
+   with theme.ai_text_style():
+    markdown_helper.render(content, context_id=f'disc_{index}')
  else:
-  with imscope.child(f"read_content_{index}", size_y=400, flags=True):
-   if app.ui_word_wrap: imgui.push_text_wrap_pos(imgui.get_content_region_avail().x)
+  with imscope.child(f"read_content_{index}", size_x=0, size_y=400, flags=True):
    last_idx = 0
    for m_idx, match in enumerate(matches):
     before = content[last_idx:match.start()]