media/01-status-sourceapp

[SunkenInTime]

Stack: 01/05

What becomes usable

• useProvider(media) now exposes status: playing | paused | stopped and display-only sourceApp on Windows.
• The existing playing wire key remains and is derived exactly as status === playing for installed/source compatibility.
• SMTC packaged AUMIDs resolve to package display names without prompting; Win32/unresolved IDs remain verbatim.
• Host formatting, dedupe storage, and both runtime readers use the frozen 12,502-byte worst-case media-frame bound. Encoding failure is logged.
• examples/now-playing renders the tri-state and source application.

Deliberately missing

Album artwork/cache and dynamic image reload (02), transport/capability channel (03), the spike-gated macOS adapter (04), and the noro acceptance gate (05).

Verification

• npm test — PASS (62/62)
• npm run typecheck — PASS
• runtime: zig build test -Dweb-layer=exclude -Dtrace=off — PASS (Zig 0.16.0)
• host: zig build test — PASS (Zig 0.16.0)
• runtime: zig build -Dweb-layer=exclude -Dtrace=off — PASS
• host: zig build — PASS
• weaver check examples/now-playing — PASS
• Live Spotify: PAUSED changed to PLAYING within the next 1 Hz poll; title, artist, source ID, and timeline remained live.

Visual gate

PASS. Both desktop-layer captures were opened and viewed. The per-element checklist and exact capture paths are recorded in docs/media-evidence/pr01-visual.md. Captures:

• docs/media-evidence/pr01-now-playing.png — paused, live metadata, raw Spotify.exe source
• docs/media-evidence/pr01-now-playing-playing.png — playing after the real player toggle

Performance

Explicitly declined: this schema/framing layer adds no poller or cadence, but no A/B performance run was made, so this PR makes no no-regression claim.

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