Phase 6: lock-screen now-playing widget

[tirthfx]

What changed

Phase 6 of the dual-surface build: the live now-playing widget on the lock screen (PRD §3.2 state L1, reference image 1).

• LockScreenNowPlayingWidget — a frosted card (album art, title/artist, scrubber, prev/pause-play/next) floating in the lower-middle over the wallpaper. Frosted .ultraThinMaterial + a dark tint so white text stays legible on any wallpaper.
• Wired to the shared MediaMetadataService — the exact same live Spotify state and transport controls the notch uses; no new plumbing.
• Reuses ScrubberView from the notch player, so the progress bar and drag-to-seek behave identically across surfaces.
• Shows for any active track (playing or paused); fades out to just wallpaper + clock when playback is idle.

Why

Continues Surface B toward the reference flow. L1 (this) → L2 click-to-expand (Phase 7) → L3 swipe-to-lyrics (Phase 8).

Base

Stacked on phase-5-lockscreen-shell (open PR #5, verified but unmerged). This PR's diff is Phase 6 only. Merge #5 first, or rebase onto main.

Notes for review — needs your eyes in Xcode

• Visuals unverifiable headlessly (the lock screen blocks synthesized keystrokes/screenshots without Accessibility/Screen-Recording). Confirmed: builds clean, launches without crashing, notch unaffected. Please run it, play a track, press ⌃⌘L: expect the widget over the wallpaper with real art/title/artist, a moving scrubber, and working prev/pause/next.
• Widget placement is centered at 60% down / clock at 17% down — my read of image 1. Easy to nudge if it's off.
• Clicking the widget doesn't expand it yet — that's Phase 7.

🤖 Generated with Claude Code

[gemini-code-assist]

Code Review

This pull request integrates the new LockScreenNowPlayingWidget into the pseudo lock screen backdrop (LockScreenBackdropView). It updates AppDelegate and PseudoLockScreenController to pass the MediaMetadataService dependency down to the backdrop view, enabling the widget to dynamically display active track metadata and handle playback controls. Feedback was provided on the use of .position(x:y:) in SwiftUI, which can expand the views' layout bounds and interfere with background hit-testing; using .offset(y:) is recommended instead.

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[gemini-code-assist]

Using .position(x:y:) in SwiftUI causes the modified views to expand and occupy the entire available space of their parent container (the full screen inside GeometryReader). This can interfere with hit-testing, potentially blocking user interactions (such as 'click-away' dismissal) on the background WallpaperView even in areas that appear empty.

Using .offset(y:) with a top-aligned ZStack is a safer and more idiomatic alternative because it shifts the views' rendering without expanding their layout bounds to fill the screen.

Suggested change

	ClockView()
	.position(x: geo.size.width / 2, y: max(96, geo.size.height * 0.17))
	if case .active(let nowPlaying) = metadata.state {
	LockScreenNowPlayingWidget(
	nowPlaying: nowPlaying,
	albumArt: metadata.albumArt,
	onPlayPause: { Task { await metadata.togglePlayPause() } },
	onPrevious: { Task { await metadata.skipToPrevious() } },
	onNext: { Task { await metadata.skipToNext() } },
	onSeek: { position in Task { await metadata.seek(to: position) } }
	)
	.position(x: geo.size.width / 2, y: geo.size.height * 0.60)
	.transition(.opacity)
	}
	ClockView()
	.offset(y: max(96, geo.size.height * 0.17))
	if case .active(let nowPlaying) = metadata.state {
	LockScreenNowPlayingWidget(
	nowPlaying: nowPlaying,
	albumArt: metadata.albumArt,
	onPlayPause: { Task { await metadata.togglePlayPause() } },
	onPrevious: { Task { await metadata.skipToPrevious() } },
	onNext: { Task { await metadata.skipToNext() } },
	onSeek: { position in Task { await metadata.seek(to: position) } }
	)
	.offset(y: geo.size.height * 0.60)
	.transition(.opacity)
	}