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

mise.toml

@@ -139,3 +139,17 @@ rm -rf boards/esp32-32e/build
 rm -rf boards/esp32-s3-lcd-43/build
 echo "[OK] Build artifacts cleaned"
 """
+
+[tasks.format]
+run = """
+clang-format -i --style=file \
+                        boards/esp32-32e/*.cpp \
+                        boards/esp32-32e/*.h \
+                        boards/esp32-32e/*.ino \
+                        boards/esp32-s3-lcd-43/*.cpp \
+                        boards/esp32-s3-lcd-43/*.h \
+                        boards/esp32-s3-lcd-43/*.ino \
+                        libraries/KlubhausCore/src/*.cpp \
+                        libraries/KlubhausCore/src/*.h \
+                        libraries/KlubhausCore/*.properties
+"""