Put text fill and the command-line preferences on the Display page

Three settings that work, persist, and could only be reached by typing their
name: TEXTFILL, CLIPROMPTLINES and COMMANDLINEFADETIME. The last two govern
how much of the command window is prompt and how long its history lingers —
the kind of thing people fiddle with once and then leave, which is exactly
what a settings dialog is for.

One fix rides along. TEXTFILL is a process-global, so changing it invalidates
the text in every open drawing; the SETVAR path rebuilt only the active tab,
leaving the others rendering the previous setting until an unrelated edit
happened to rebuild them. Both paths now go through
`invalidate_text_everywhere`, so the checkbox and the command cannot disagree.

Co-Authored-By: Claude Opus 5 <[email protected]>

src/app/commands/styleprops.rs

@@ -2184,9 +2184,7 @@ impl OpenCADStudio {
                     // TEXTFILL reset the glyph atlas; re-tessellate so text picks
                     // up the re-baked filled / hollow tiles.
                     if name == "TEXTFILL" {
-                        self.tabs[i]
-                            .scene
-                            .invalidate_text_geometry_dependencies();
+                        self.invalidate_text_everywhere();
                     }
                     // LTSCALE scales the dash pattern baked into every wire, and
                     // PDMODE / PDSIZE decide the point glyph built at tessellation

src/app/mod.rs

@@ -2011,6 +2011,12 @@ pub enum Message {
     SaveTimeChanged(i32),
     /// Toggle keeping a `.bak` copy when overwriting a drawing (ISAVEBAK).
     BackupOnSaveChanged(bool),
+    /// Toggle filled TrueType glyphs (TEXTFILL).
+    TextFillChanged(bool),
+    /// Change how many prompt lines sit above the command window (CLIPROMPTLINES).
+    ClipromptLinesChanged(i32),
+    /// Change how long command-line history lines stay visible (COMMANDLINEFADETIME).
+    CommandLineFadeChanged(i32),
     /// Restore Model Space display/canvas appearance to defaults.
     RestoreModelSpaceDisplayDefaults,
     /// Restore Selection visual effect settings to defaults.

src/app/update/file.rs

@@ -355,6 +355,17 @@ impl OpenCADStudio {
         }
     }
 
+    /// Rebuild text geometry in every open drawing.
+    ///
+    /// `TEXTFILL` is a process-global, so a change to it invalidates the text
+    /// in every tab. Doing only the active one leaves the others rendering the
+    /// previous setting until some unrelated edit happens to rebuild them.
+    pub(in crate::app) fn invalidate_text_everywhere(&mut self) {
+        for tab in &mut self.tabs {
+            tab.scene.invalidate_text_geometry_dependencies();
+        }
+    }
+
     /// Snapshot the persisted UI preferences from live state.
     pub(in crate::app) fn current_settings(&self) -> crate::app::settings::UserSettings {
         crate::app::settings::UserSettings {

src/app/update/mod.rs

@@ -6200,6 +6200,29 @@ impl OpenCADStudio {
                 Task::none()
             }
 
+            Message::TextFillChanged(filled) => {
+                crate::scene::text::sdf_atlas::set_textfill(filled);
+                self.invalidate_text_everywhere();
+                self.persist_settings_if_changed();
+                Task::none()
+            }
+
+            Message::ClipromptLinesChanged(lines) => {
+                let lines = crate::app::settings::clamp_clipromptlines(lines);
+                self.cliprompt_lines = lines;
+                self.command_line.set_cliprompt_lines(lines.clamp(0, 50) as u8);
+                self.persist_settings_if_changed();
+                Task::none()
+            }
+
+            Message::CommandLineFadeChanged(ms) => {
+                let ms = crate::app::settings::clamp_commandline_fade_ms(ms);
+                self.commandline_fade_ms = ms;
+                self.command_line.set_commandline_fade_ms(ms.max(0) as u32);
+                self.persist_settings_if_changed();
+                Task::none()
+            }
+
             Message::PickDragRectToggled(rectangle) => {
                 self.pick_drag_rect = rectangle;
                 self.persist_settings_if_changed();

src/app/view/modal.rs

@@ -195,6 +195,9 @@ impl OpenCADStudio {
                         crate::ui::window::options::AppPrefs {
                             savetime_min: self.savetime_min,
                             backup_on_save: self.backup_on_save,
+                            textfill: crate::scene::text::sdf_atlas::textfill(),
+                            cliprompt_lines: self.cliprompt_lines,
+                            commandline_fade_ms: self.commandline_fade_ms,
                         },
                         self.double_click_block_refedit,
                         self.double_click_block_attedit,