forza-trigger: drop pedal-off early-returns (root cause of "no reaction")

Live diagnostic on yarn revealed the daemon was receiving 324-byte FH5
packets correctly (5.7MB on the systemd socket; strace showed steady
recvfrom + write to /dev/hidraw7) but writing trigger mode 0x05
(no-resistance) on nearly every tick. Cause: `accel` and `brake` are
0 most of the time during normal play (off-throttle on straight
sections, off-brake when not braking). Both handlers had:

  if accel/255 <= THROTTLE_INPUT_THRESHOLD: effect.off(); return
  if brake/255 <= BRAKE_INPUT_THRESHOLD:    effect.off(); return

Every off-pedal packet set the trigger to OFF. Brief pedal-on moments
set vibration. The result: rapidly oscillating off↔vibration state,
imperceptible at 60 Hz packet rate.

These early-returns were holdovers from the previous Race-Element 1:1
port (variant A), which IS designed to be silent unless slipping.
Variant D's whole point is "always feels something" — Cosmii has no
pedal-off gate, and its baseline branch produces feedback even at
brake=0/accel=0 with strength clamped to MIN.

Fix: remove both early-returns. Foot-off-pedal flows through the
baseline branch and produces feedback(strength=MIN_*_RESISTANCE). The
user feels light constant resistance instead of silence. Trigger only
returns to physical-rest when out-of-race (run-loop's reset_triggers).

Also drop the now-dead BRAKE_INPUT_THRESHOLD / THROTTLE_INPUT_THRESHOLD
constants. Two tests renamed and updated to assert MIN-strength
baseline feedback instead of effect.off() on zero pedal.

54/54 tests pass. Build clean.

hosts/yarn/forza-trigger/forza_trigger.py

@@ -92,11 +92,6 @@ LOG = logging.getLogger("forza-trigger")
 # Source citations point to legacy_Program.cs (Cosmii) and fds_Settings.cs
 # (Patmagauran defaults, inherited by Cosmii via INI file).
 
-# Pedal input gates: avoid noise at zero pedal pressure. Not in upstream;
-# carried over from the previous Race-Element port (BRAKE_INPUT_THRESHOLD = 3%).
-BRAKE_INPUT_THRESHOLD = 0.03  # 0..1 fraction of pedal travel
-THROTTLE_INPUT_THRESHOLD = 0.03
-
 # --- L2 brake ---------------------------------------------------------------
 # fds_Settings.cs (Cosmii inherits via appsettings.ini).
 GRIP_LOSS_VAL = 0.5             # combined-slip threshold for vibration overlay
@@ -402,12 +397,12 @@ def handle_throttle(controller: DualSenseController, pkt: ForzaDataPacket, state
                              fall through to feedback-only (avoids audible
                              clicking at very low frequencies).
       - In-race + no slip:   continuous feedback resistance scaled by avgAccel.
-      - Pedal not pressed:   trigger off.
+      - Pedal at rest:       baseline still active at MIN strength so the
+                             trigger always has *some* feel under the finger.
+                             Trigger is only `effect.off()` when out of race
+                             (handled by the run-loop, not here).
     """
     accel = _safe_field(pkt, "accel", 0.0)
-    if accel / 255.0 <= THROTTLE_INPUT_THRESHOLD:
-        controller.right_trigger.effect.off()
-        return
 
     avg_a = _avg_accel(pkt)
     _, combined_front, combined_rear = _combined_slip(pkt)
@@ -484,12 +479,10 @@ def handle_brake(controller: DualSenseController, pkt: ForzaDataPacket, state: D
       - In-race + slip:      vibration overlay (freq from slip, amp from brake input).
                              Below MIN_BRAKE_VIBRATION freq → revert to feedback-only.
       - In-race + no slip:   continuous feedback resistance scaled by brake input.
-      - Pedal not pressed:   trigger off.
+      - Pedal at rest:       baseline still active at MIN strength so the
+                             trigger always has some feel.
     """
     brake = _safe_field(pkt, "brake", 0.0)
-    if brake / 255.0 <= BRAKE_INPUT_THRESHOLD:
-        controller.left_trigger.effect.off()
-        return
 
     # Use the worst axle's slip for both detection and the freq curve.
     # Cosmii's all-4 average misses single-axle ABS events (front locks