fix(behaviors): Fix timing of delayed hold-tap trigger

A hold-tap timer event would be triggered too soon if the hold-tap
was delayed for longer than its tapping-term. This may cause
accidental hold behavior when the correct behavior would be tap.

By queuing the timer event instead of executing it immediately,
other delayed events get a chance to be processed properly.

app/src/behaviors/behavior_hold_tap.c

@@ -449,11 +449,7 @@ static int on_hold_tap_binding_pressed(struct zmk_behavior_binding *binding,
     // if this behavior was queued we have to adjust the timer to only
     // wait for the remaining time.
     int32_t tapping_term_ms_left = (hold_tap->timestamp + cfg->tapping_term_ms) - k_uptime_get();
-    if (tapping_term_ms_left > 0) {
-        k_delayed_work_submit(&hold_tap->work, K_MSEC(tapping_term_ms_left));
-    } else {
-        decide_hold_tap(hold_tap, HT_TIMER_EVENT);
-    }
+    k_delayed_work_submit(&hold_tap->work, K_MSEC(tapping_term_ms_left));
 
     return ZMK_BEHAVIOR_OPAQUE;
 }

app/tests/hold-tap/tap-preferred/6-nested-timeouts/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-preferred/6-nested-timeouts/keycode_events.snapshot

@@ -0,0 +1,10 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided hold-timer (tap-preferred decision moment timer)
+kp_pressed: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_pressed: 1 new undecided hold_tap
+ht_decide: 1 decided tap (tap-preferred decision moment key-up)
+kp_pressed: usage_page 0x07 keycode 0x0d implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x0d implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 1 cleaning up hold-tap
+kp_released: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-preferred/6-nested-timeouts/native_posix.keymap

@@ -0,0 +1,53 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+
+/* 
+* A hold-tap with long tapping term is pressed first.
+* A hold-tap with short tapping term is quickly tapped.
+* The short tapping term hold-tap should 'tap', not 'hold'.
+*/
+
+/ {
+	behaviors {
+		tp_short: short_tap {
+			compatible = "zmk,behavior-hold-tap";
+			label = "MOD_TAP_SHORT";
+			#binding-cells = <2>;
+			flavor = "tap-preferred";
+			tapping-term-ms = <100>;
+			quick-tap-ms = <200>;
+			bindings = <&kp>, <&kp>;
+		};
+		tp_long: long_tap {
+			compatible = "zmk,behavior-hold-tap";
+			label = "MOD_TAP_LONG";
+			#binding-cells = <2>;
+			flavor = "tap-preferred";
+			tapping-term-ms = <200>;
+			quick-tap-ms = <200>;
+			bindings = <&kp>, <&kp>;
+		};
+	};
+
+	keymap {
+		compatible = "zmk,keymap";
+		label ="Default keymap";
+
+		default_layer {
+			bindings = <
+				&tp_long LEFT_SHIFT F &tp_short LEFT_CONTROL J
+				&kp D &kp RIGHT_CONTROL>;
+		};
+	};
+};
+
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,20) 
+		ZMK_MOCK_PRESS(0,1,20) 
+		ZMK_MOCK_RELEASE(0,1,200) 
+		ZMK_MOCK_RELEASE(0,0,10) 
+	>;
+};