fix: keep the workspace green on macOS after the mic/touch/rich-input batch

The new features were Linux-built only and broke the documented macOS gate
(cargo build/test/clippy --workspace) four ways, all fixed following the existing
platform-gating conventions:

- m3.rs: mic_service_thread split into the Linux worker and a non-Linux stub that
  drains and drops (sessions still count the datagrams) — opus/PipeWire are
  Linux-gated deps, same pattern as audio_thread.
- punktfunk-client-rs: the new `opus` dependency moved into the Linux target table and
  --mic-test gated with a warn-and-skip stub (only the synthetic-tone test rig needs
  the encoder; the mic uplink itself is portable).
- gamestream/audio.rs: SAMPLE_RATE import gated to any(linux, test) (the frame_sizing
  test uses it everywhere, the data plane only on Linux).
- tests/c_abi.rs: the harness's macOS link flags gained Security + CoreFoundation —
  the quic feature now pulls rustls's platform verifier into the staticlib.

Also: two clippy match-ref-pats lints in the new rich-input/HID-output decoders
(clippy -D warnings is the repo gate), the regenerated punktfunk_core.h committed (the
checked-in copy predated the rich-input/HID-output constants — CI fails on drift), and
web's inlang cache dir gitignored.

cargo build/test/clippy/fmt --workspace: green on macOS, 122 tests passing.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/punktfunk-core/src/quic.rs

@@ -690,15 +690,15 @@ impl RichInput {
         if b.first() != Some(&RICH_INPUT_MAGIC) {
             return None;
         }
-        match b.get(1)? {
-            &RICH_TOUCHPAD if b.len() >= 9 => Some(RichInput::Touchpad {
+        match *b.get(1)? {
+            RICH_TOUCHPAD if b.len() >= 9 => Some(RichInput::Touchpad {
                 pad: b[2],
                 finger: b[3],
                 active: b[4] != 0,
                 x: u16::from_le_bytes([b[5], b[6]]),
                 y: u16::from_le_bytes([b[7], b[8]]),
             }),
-            &RICH_MOTION if b.len() >= 15 => {
+            RICH_MOTION if b.len() >= 15 => {
                 let i16at = |o: usize| i16::from_le_bytes([b[o], b[o + 1]]);
                 Some(RichInput::Motion {
                     pad: b[2],
@@ -751,18 +751,18 @@ impl HidOutput {
         if b.first() != Some(&HIDOUT_MAGIC) {
             return None;
         }
-        match b.get(1)? {
-            &HIDOUT_LED if b.len() >= 6 => Some(HidOutput::Led {
+        match *b.get(1)? {
+            HIDOUT_LED if b.len() >= 6 => Some(HidOutput::Led {
                 pad: b[2],
                 r: b[3],
                 g: b[4],
                 b: b[5],
             }),
-            &HIDOUT_PLAYER_LEDS if b.len() >= 4 => Some(HidOutput::PlayerLeds {
+            HIDOUT_PLAYER_LEDS if b.len() >= 4 => Some(HidOutput::PlayerLeds {
                 pad: b[2],
                 bits: b[3],
             }),
-            &HIDOUT_TRIGGER if b.len() >= 4 => Some(HidOutput::Trigger {
+            HIDOUT_TRIGGER if b.len() >= 4 => Some(HidOutput::Trigger {
                 pad: b[2],
                 which: b[3],
                 effect: b[4..].to_vec(),