dailz 6d49222de8 feat: Phase 1 MVP with audit fixes — Wayland screen capture + VAAPI encoding ...

Phase 1 MVP implementation of wl-webrtc: Wayland screen capture tool
with hardware-accelerated VAAPI H.264 encoding and WebTransport output.

Includes all 9 runtime bug fixes from code audit (fix-audit-issues plan):

CRITICAL:
- C2: h264_metadata BSF with repeat_sps/repeat_pps in encode pipeline
- C4: FpsLimit wired as timing gate in on_copy_complete

HIGH:
- C3+A2: DRM device discovery via dmabuf feedback MainDevice event,
  unified resolve_drm_path() helper (CLI > compositor > auto > fallback)
- H2: Separate physical_size (mm) from mode_size (pixels) in wl_output
- H1+A3: Multi-output warning + named-output-not-found error

MEDIUM:
- M5: tv_sec u32->u64 to avoid Y2106 timestamp truncation
- M4: Guard against SHM Buffer event (DMA-BUF only)

Key components:
- src/avhw.rs: FFmpeg VAAPI encoder + filter graph + BSF pipeline
- src/state.rs: Wayland event loop + output negotiation + screencopy
- src/cap_wlr_screencopy.rs: wlr-screencopy capture source
- src/fps_limit.rs: Frame rate limiting with configurable target
- src/transform.rs: Frame format conversion utilities

2026-04-05 23:35:00 +08:00

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