diff --git a/conductor/tracks.md b/conductor/tracks.md
index 1967a8d6..b050c993 100644
--- a/conductor/tracks.md
+++ b/conductor/tracks.md
@@ -313,5 +313,5 @@ This file tracks all major tracks for the project. Each track has its own detail
 
 ---
 
-- [ ] **Track: Fix Approve Modal sizing and inline full preview**
+- [~] **Track: Fix Approve Modal sizing and inline full preview**
 *Link: [./tracks/approve_modal_ux_20260601/](./tracks/approve_modal_ux_20260601/)*
diff --git a/src/gui_2.py b/src/gui_2.py
index 386b0075..1c8ef2b0 100644
--- a/src/gui_2.py
+++ b/src/gui_2.py
@@ -4419,20 +4419,24 @@ def render_approve_script_modal(app: App) -> None:
  else:
   app._pending_dialog_open = False
  
- if imgui.begin_popup_modal("Approve PowerShell Command", None, imgui.WindowFlags_.always_auto_resize)[0]:
+ imgui.set_next_window_size(imgui.ImVec2(800, 600), imgui.Cond_.first_use_ever)
+ if imgui.begin_popup_modal("Approve PowerShell Command", None, 0)[0]:
   if not dlg: imgui.close_current_popup()
   else:
    imgui.text("The AI wants to run the following PowerShell script:")
    imgui.text_colored(vec4(200, 200, 100), f"base_dir: {dlg._base_dir}")
    imgui.separator()
    # Checkbox to toggle full preview inside modal
-   _, app.show_windows["Text Viewer"] = imgui.checkbox("Show Full Preview", app.show_windows.get("Text Viewer", False))
-   if app.show_windows.get("Text Viewer", False):
-    imgui.begin_child("preview_child", imgui.ImVec2(600, 300), True)
-    imgui.text_unformatted(dlg._script)
+   if not hasattr(app, 'ui_approve_modal_preview'): app.ui_approve_modal_preview = False
+   _, app.ui_approve_modal_preview = imgui.checkbox("Read-only Full Preview", app.ui_approve_modal_preview)
+   
+   avail_y = imgui.get_content_region_avail().y - 40 # reserve space for buttons
+   if app.ui_approve_modal_preview:
+    imgui.begin_child("preview_child", imgui.ImVec2(-1, avail_y), True)
+    markdown_helper.render(f"```powershell\n{dlg._script}\n```", context_id="approve_script_preview")
     imgui.end_child()
    else:
-    ch, dlg._script = imgui.input_text_multiline("##confirm_script", dlg._script, imgui.ImVec2(-1, 200))
+    ch, dlg._script = imgui.input_text_multiline("##confirm_script", dlg._script, imgui.ImVec2(-1, avail_y))
    imgui.separator()
    if imgui.button("Approve & Run", imgui.ImVec2(120, 0)):
     with dlg._condition: