Bump version to 0.0.64

The firmware ran every lane at a fixed beat/sub, ignoring the ~ flag, so a poly lane
(e.g. cowbell:3~) played quarter-notes instead of fitting its cycle into lane 1's bar —
the duple 'and' coincided with a triplet note. Now match the web engine: a poly lane's
whole cycle spans the master lane's bar (dur = master_bar / steps). Verified: claves:5~
over kick:4 -> both cycles = 2.400s (5-over-4); 3-over-2 lands correctly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-0.0.63
+0.0.64

pico-cp/code.py

@@ -357,10 +357,16 @@ class App:
         self.bpm, self.lanes = parse_program(prog)
         self.master = self.lanes[0]
         self._reset_clock(); self.draw_bpm(); self.draw_status(); self.build_grid()
+    def _lane_dur(self, L):
+        beat = 60_000_000_000 / self.bpm
+        if L['poly']:                                   # ~ polymeter: fit this lane's whole cycle into lane 1's bar
+            m = self.lanes[0]; master_bar = beat * (m['steps'] // m['sub'])
+            return int(master_bar / L['steps'])
+        return int(beat / L['sub'])                     # straight: a step = one beat / subdivision
     def _reset_clock(self):
         now = time.monotonic_ns()
         for L in self.lanes:
-            L['next'] = now; L['step'] = -1; L['dur'] = int(60_000_000_000 / self.bpm / L['sub'])
+            L['next'] = now; L['step'] = -1; L['dur'] = self._lane_dur(L)
 
     # ---------- audio + light ----------
     def click(self, level):
@@ -388,7 +394,7 @@ class App:
         v = max(30, min(300, v))
         if v != self.bpm:
             self.bpm = v
-            for L in self.lanes: L['dur'] = int(60_000_000_000 / self.bpm / L['sub'])
+            for L in self.lanes: L['dur'] = self._lane_dur(L)
             self.draw_bpm()
     def goto(self, i):
         was = self.running; self.load(i); self._label("play")