Feat: UI / UX fixes

src/state/ui.rs

@@ -3,7 +3,7 @@ use std::time::{Duration, Instant};
 
 use cagire_markdown::ParsedMarkdown;
 use cagire_ratatui::Sparkles;
-use tachyonfx::{fx, Effect, EffectManager, Interpolation};
+use tachyonfx::{fx, Effect, EffectManager, Interpolation, Motion};
 
 use crate::page::Page;
 use crate::state::effects::FxId;
@@ -83,6 +83,8 @@ pub struct UiState {
     pub window_height: u32,
     pub load_demo_on_startup: bool,
     pub demo_index: usize,
+    pub nav_indicator_until: Option<Instant>,
+    pub nav_fx: RefCell<Option<Effect>>,
 }
 
 impl Default for UiState {
@@ -135,6 +137,8 @@ impl Default for UiState {
             window_height: 800,
             load_demo_on_startup: true,
             demo_index: 0,
+            nav_indicator_until: None,
+            nav_fx: RefCell::new(None),
         }
     }
 }
@@ -196,6 +200,19 @@ impl UiState {
         self.minimap = MinimapMode::Hidden;
     }
 
+    pub fn show_nav_indicator(&mut self, duration_ms: u64, direction: Motion) {
+        self.nav_indicator_until = Some(Instant::now() + Duration::from_millis(duration_ms));
+        let bg = crate::theme::get().ui.bg;
+        *self.nav_fx.borrow_mut() = Some(fx::fade_from_fg(bg, (150, Interpolation::QuadOut)));
+        crate::state::effects::nav_sweep(self, direction);
+    }
+
+    pub fn nav_indicator_visible(&self) -> bool {
+        self.nav_indicator_until
+            .map(|t| Instant::now() < t)
+            .unwrap_or(false)
+    }
+
     pub fn invalidate_help_cache(&self) {
         self.help_parsed
             .borrow_mut()