feat(tosc): clip quantize and queued blink

Add 4 /launch/quant buttons (1/2, 1, 1BAR, 2BAR) with constf args
0.5/1/4/8 to LIVE page top bar. Extend pad.lua: onReceiveOSC reads
state int 0-3 (off/playing/queued-launch/queued-stop); onFrame pulses
amber when blinking=true. Test: test_live_page_quant_buttons asserts
CONSTANT/FLOAT args. 22 tests pass; dist rebuilt (8482 bytes).

touchosc/gen/layout.py

@@ -138,6 +138,14 @@ def live_page():
         messages=[s.osc("/sync/beat", [s.val()], send=0, receive=1, feedback=1)],
     ))
 
+    # Quantize selector row (send-only momentary): 1/2 beat / 1 beat / 1 bar / 2 bars
+    quant_defs = [("1/2", 0.5), ("1", 1), ("1 BAR", 4), ("2 BAR", 8)]
+    qx_start, qy, qw, qh, qgap = 625, 8, 130, 50, 8
+    for i, (lbl, beats) in enumerate(quant_defs):
+        qx = qx_start + i * (qw + qgap)
+        ch.append(button(lbl, "/launch/quant", qx, qy, qw, qh, args=[s.constf(beats)]))
+    ch.append(label("QUANT", qx_start, 62, 120, 20))
+
     # 4x4 pad grid -----------------------------------------------------------
     gx, gy, pw, ph, gap = 10, 96, 283, 178, 10
     for i, name in enumerate(PATTERNS):

touchosc/gen/lua/pad.lua

@@ -1,16 +1,33 @@
 -- Pad GROUP: reflect armed state from SC engine onto the arm button color.
 -- API verified on GrosMac at fidelity gate.
 -- self.children[1] is the arm BUTTON; color driven by /armed/<name>.
+-- State int: 0=off, 1=playing (solid green), 2=queued-launch (blink), 3=queued-stop (blink).
+local blinking = false
+
 function onReceiveOSC(message, connections)
   local path = message[1]
   local name = self.name:gsub("pad_", "")
   if path == "/armed/" .. name then
     local args = message[2]
-    local on = (args and args[1] and tonumber(args[1].value)) or 0
+    local state = math.floor((args and args[1] and tonumber(args[1].value)) or 0)
     if self.children and self.children[1] then
-      self.children[1].color = on > 0.5
-        and Color(0.27, 0.80, 0.40, 1)
-        or  Color(0.11, 0.11, 0.11, 1)
+      if state == 0 then
+        blinking = false
+        self.children[1].color = Color(0.11, 0.11, 0.11, 1)
+      elseif state == 1 then
+        blinking = false
+        self.children[1].color = Color(0.27, 0.80, 0.40, 1)
+      else
+        -- state 2 (queued-launch) or 3 (queued-stop): blink amber
+        blinking = true
+      end
     end
   end
 end
+
+function onFrame()
+  if blinking and self.children and self.children[1] then
+    local phase = (math.sin(getTime() * math.pi * 2.5) + 1) * 0.5
+    self.children[1].color = Color(0.80 * phase, 0.60 * phase, 0.10, 1)
+  end
+end

touchosc/tests/test_layout.py

@@ -249,6 +249,31 @@ def test_seq_page_no_sync_amp():
     assert "/sync/amp" not in addrs, "/sync/amp found — per-voice VU was supposed to be omitted"
 
 
+# ---------------------------------------------------------------------------
+# Page 1 — LIVE: quantize selector
+# ---------------------------------------------------------------------------
+
+def test_live_page_quant_buttons():
+    """LIVE page must have 4 /launch/quant buttons with CONSTANT/FLOAT args {0.5,1,4,8}."""
+    page = layout.live_page()
+    quant_args = []
+    for osc_el in page.findall(".//messages/osc"):
+        path_val = osc_el.find("path/partial/value")
+        if path_val is not None and path_val.text == "/launch/quant":
+            for part in osc_el.findall("arguments/partial"):
+                typ = part.find("type")
+                conv = part.find("conversion")
+                val = part.find("value")
+                if typ is not None and conv is not None and val is not None:
+                    quant_args.append((typ.text, conv.text, val.text))
+    assert len(quant_args) == 4, f"expected 4 /launch/quant arg partials, got {len(quant_args)}"
+    for typ, conv, _ in quant_args:
+        assert typ == "CONSTANT", f"quant arg type must be CONSTANT, got {typ}"
+        assert conv == "FLOAT", f"quant arg conversion must be FLOAT, got {conv}"
+    vals = {v for _, _, v in quant_args}
+    assert vals == {"0.5", "1", "4", "8"}, f"expected quant values {{0.5,1,4,8}}, got {vals}"
+
+
 # ---------------------------------------------------------------------------
 # Pad armed receive on GROUP — FIX 1 regression guard
 # ---------------------------------------------------------------------------