fix(gui): Restore discussion tinting and fix Markdown table width

- Implement layered tinting using draw_list channels in modular discussion renderer.
- Fix vertical squashing of Markdown tables by forcing full group width with a dummy.
- Consolidate color constants into src/ui_shared.py to prevent circular imports.
- Update src/theme_2.py with role-based tint helpers.
- Successfully verified imports and layout logic.

src/ui_shared.py

@@ -1,13 +1,43 @@
 from __future__ import annotations
 from imgui_bundle import imgui
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Any
 
 if TYPE_CHECKING:
     from src.gui_2 import App
 
+# Standard Color Constants (normalized to 0-1)
+def vec4(r: float, g: float, b: float, a: float = 1.0) -> imgui.ImVec4: 
+ return imgui.ImVec4(r/255.0, g/255.0, b/255.0, a)
+
+C_OUT: imgui.ImVec4 = vec4(100, 200, 255)
+C_IN:  imgui.ImVec4 = vec4(140, 255, 160)
+C_REQ: imgui.ImVec4 = vec4(255, 220, 100)
+C_RES: imgui.ImVec4 = vec4(180, 255, 180)
+C_TC:  imgui.ImVec4 = vec4(255, 180, 80)
+C_TR:  imgui.ImVec4 = vec4(180, 220, 255)
+C_TRS: imgui.ImVec4 = vec4(200, 180, 255)
+C_LBL: imgui.ImVec4 = vec4(180, 180, 180)
+C_VAL: imgui.ImVec4 = vec4(220, 220, 220)
+C_KEY: imgui.ImVec4 = vec4(140, 200, 255)
+C_NUM: imgui.ImVec4 = vec4(180, 255, 180)
+C_SUB: imgui.ImVec4 = vec4(220, 200, 120)
+
 def render_text_viewer(app: 'App', label: str, content: str, text_type: str = 'text', force_open: bool = False, id_suffix: str = "") -> None:
  if imgui.button(f"[+]##{id_suffix or str(id(content))}") or force_open:
   app.text_viewer_type = text_type
   app.show_windows["Text Viewer"] = True
   app.text_viewer_title = label
   app.text_viewer_content = content
+
+def render_selectable_label(app: 'App', label: str, value: str, width: float = 0.0, multiline: bool = False, height: float = 0.0, color: Any = None) -> None:
+ from src import imscope
+ with imscope.id(label + str(hash(value))):
+  with imscope.style_color(imgui.Col_.frame_bg, imgui.ImVec4(0, 0, 0, 0)), \
+       imscope.style_var(imgui.StyleVar_.frame_border_size, 0.0):
+   if color:
+    with imscope.style_color(imgui.Col_.text, color):
+     if multiline: _, _ = imgui.input_text_multiline(f"##{label}", value, imgui.ImVec2(width, height), imgui.InputTextFlags_.read_only)
+     else:         _, _ = imgui.input_text(f"##{label}", value, imgui.InputTextFlags_.read_only)
+   else:
+    if multiline: _, _ = imgui.input_text_multiline(f"##{label}", value, imgui.ImVec2(width, height), imgui.InputTextFlags_.read_only)
+    else:         _, _ = imgui.input_text(f"##{label}", value, imgui.InputTextFlags_.read_only)