feat(ui): MAIN and ADVANCED pages, Anvil main page around Mode, Split and Sub level

Producers found the panels crowded: every control had the same weight. The
header now carries a MAIN / ADVANCED switch (common-ui header_paged). The
main page keeps the controls a first result needs; the advanced page shows
everything, as before.

- Anvil: Mode (Replace or Enhance), Split and Sub level, plus Octave, Ghost,
  Keep and Output. Kick lock, Dynamics, Drive, Glide, Phase, Gate and the
  pitch switches move to Advanced. The note readout says when the original
  sub plays because tracking is unsure.
- Lathe, Temper, Knurl, Planish, Braze: tracking and fine-tuning controls
  (Gate, Smooth, Snap, Harmonics, Push at, Floor, Bright, Normalize, band
  gains, Phase) move to Advanced. Lathe labels the octaves of the note in Hz
  on the harmonic axis.
- Forge passes the page to its module pages.
- Weld: the main page shows the level won back at full height, Mode,
  Response and Output; the phase plot, Sections, Low, High and Gate move to
  Advanced.
- editor-check renders the advanced pages with --advanced.

plugins/forge/ui/src/lib.rs

@@ -14,6 +14,8 @@ pub struct State {
     pub knurl: knurl_ui::State,
     /// Module whose page is shown.
     pub page: Stage,
+    /// Module pages show their advanced controls. Not saved.
+    pub advanced: bool,
     latency: u32,
     sample_rate: f32,
     /// True while a pointer button is held, so knob drags become one host gesture.
@@ -27,6 +29,7 @@ impl Default for State {
             temper: temper_ui::State::default(),
             knurl: knurl_ui::State::default(),
             page: Stage::Lathe,
+            advanced: false,
             latency: 0,
             sample_rate: 48000.,
             gesture_active: false,
@@ -121,18 +124,29 @@ pub fn show(ui: &mut egui::Ui, settings: &mut Settings, state: &mut State) {
     state.gesture_active = ui.input(|i| i.pointer.any_down());
     settings.share();
     ui.add_space(2.);
-    header(ui, "FORGE", "TRACKED CHANNEL STRIP", |ui| {
-        let r = ui
-            .selectable_label(settings.bypass, RichText::new("BYPASS").size(13.))
-            .on_hover_text("Crossfade to the delayed dry signal.");
-        if r.clicked() {
-            settings.bypass = !settings.bypass;
-        }
-        ui.separator();
-        let mut mode = settings.source.mode();
-        pitch_from(ui, &mut mode, &mut settings.pitch);
-        settings.source = Source::from_mode(mode);
-    });
+    let mut advanced = state.advanced;
+    header_paged(
+        ui,
+        "FORGE",
+        "TRACKED CHANNEL STRIP",
+        Some(&mut advanced),
+        |ui| {
+            let r = ui
+                .selectable_label(settings.bypass, RichText::new("BYPASS").size(13.))
+                .on_hover_text("Crossfade to the delayed dry signal.");
+            if r.clicked() {
+                settings.bypass = !settings.bypass;
+            }
+            ui.separator();
+            let mut mode = settings.source.mode();
+            pitch_from(ui, &mut mode, &mut settings.pitch);
+            settings.source = Source::from_mode(mode);
+        },
+    );
+    state.advanced = advanced;
+    state.lathe.advanced = advanced;
+    state.temper.advanced = advanced;
+    state.knurl.advanced = advanced;
     ui.add_space(6.);
     panel(ui, |ui| {
         ui.set_width(ui.available_width());