feat(display): add active state parameter to hint animation

1. **Added `active` parameter to hint animation**
   - `updateHint()` now accepts a boolean `active` parameter across both display drivers (TFT and GFX)
   - When `active=true`: faster pulse animation (500ms period) during active hold
   - When `active=false`: slower pulse animation (2000ms period) during idle state

2. **Improved animation calculations**
   - Replaced modulo operator with `fmodf()` for cleaner float calculations
   - Standardized to `static_cast<uint8_t>()` for type conversions
   - Fixed GFX driver to use `color565()` method instead of manual bit shifting

3. **Updated hint display logic**
   - Now differentiates between "holding" state (fast pulse) and "idle" state (slow pulse)
   - Hint draws at both states when `holdStartX >= 0` (touch position captured)

4. **Added code formatter task**
   - New `mise.toml` task for running clang-format across all source files

- Users get **visual feedback differentiation**: fast pulsing during active hold vs. slow pulsing when idle
- More intuitive UI that clearly indicates whether a long-press is in progress or just waiting
- Cleaner, more maintainable code with standardized calculations and type conversions

sketches/doorbell-touch/boards/esp32-s3-lcd-43/esp32-s3-lcd-43.ino

@@ -40,19 +40,21 @@ void loop() {
             holdStartY = -1;
         }
         if(h.started) {
-            // Capture initial touch position
             holdStartX = evt.x;
             holdStartY = evt.y;
         }
-        if(!h.active && holdStartX >= 0) {
-            display.updateHint(holdStartX, holdStartY);
+        // Draw hint during hold (ACTIVE) or idle (IDLE)
+        if(holdStartX >= 0) {
+            if(h.active) {
+                display.updateHint(holdStartX, holdStartY, true);
+            } else {
+                display.updateHint(holdStartX, holdStartY, false);
+            }
         }
     } else {
-        // Reset when not alerting
         holdStartX = -1;
         holdStartY = -1;
     }
-
     if(evt.pressed) {
         if(st.screen == ScreenID::OFF) {
             // Tap in OFF mode → wake to DASHBOARD