style(waveform, pad): smooth waveform ballistics and theme-sync pads

Author: rayocta303

src/ui/player/deckstrip.c

@@ -411,8 +411,8 @@ static void DeckStrip_Draw(Component *base) {
       Color BL_HIGH = {246, 251, 246, 255};
 
       float smLo = 0, smMi = 0, smHi = 0;
-      const float ATK = 1.0f; // Instant
-      const float REL = 1.0f;
+      const float ATK = 0.9f;
+      const float REL = 0.12f;
 
       for (int xi = 0; xi < (int)ww; xi++) {
         float r0 = (float)xi / ww;

src/ui/player/waveform.c

@@ -357,8 +357,8 @@ static void Waveform_Draw(Component *base) {
   const float HIGH_SCALE = 1.0f;
   const float NORM = 2.0f / 255.0f; // Boosted to 2.0x to fill canvas and prevent empty space
   const float PWV2_HSCALE = waveCenter / 31.0f;
-  const float ATK = 1.0f; // Instant attack (no smoothing)
-  const float REL = 1.0f; // Instant release
+  const float ATK = 0.9f; // Fast attack
+  const float REL = 0.12f; // Smooth release for that 'tail' look
 
   // hardware-accurate 3-band palette (Blue/Green/White)
   Color BL_LOW = {16, 105, 238, 255};   // Teensy col_blue