A native player bar, and the Glass look it sits in (#2)

The first native surface, and the one that settles how the rest will look.

Glass.swift is not a port of the stylesheet. ipx's Glass is already an
approximation of what UIKit gives away -- panels are a 70% colour under
blur(24px) saturate(180%) with an inset top highlight, which is a material,
and the palette names Apple's own colours in its own comments. So where the
CSS had to write #409cff in dark and #0055aa in light, because no single
blue clears AA over the wash, this asks for the system blue and gets both.
Only the wash keeps its hex values: there the colour is the design and
there is no system equivalent to ask for.

PlayerBarView draws what Playback knows, and Playback is the same object
the lock screen and the remote commands drive, so all of them agree without
anything being kept in step by hand. Back 15 and forward 30 match the page
and the lock screen, so every way of skipping moves by the same amount.
Seeking waits for the finger to lift rather than sending a stream of seeks
at a player still answering the last one.

The page's own bar is hidden rather than left to sit under ours. Its play
buttons still work -- they post to the host either way -- but two bars for
one player would be two sets of buttons disagreeing about what is playing,
and only one of them is what CarPlay will be driving.

One test had to be rewritten rather than the code: it asserted that one of
the fixture's two episodes had a file, which stops being true the moment
the event test asks the daemon to scan. The daemon is shared and keeps what
earlier tests did to it, so the assertion now asks what the downloaded
filter means instead of how many things match it today. Thirteen pass,
twice over the same accumulated state.

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

ios/Sources/PlayerBarView.swift

@@ -0,0 +1,133 @@
+import SwiftUI
+
+/// The bar along the bottom, in Glass.
+///
+/// It draws what Playback knows, and Playback is the same object CarPlay and the lock screen
+/// drive, so all three agree without anything being kept in step by hand.
+struct PlayerBarView: View {
+    @ObservedObject var playback: Playback
+    /// Dragging the scrubber has to win over the clock, or the thumb fights the finger.
+    @State private var scrubbing: Double?
+
+    private var item: Playback.Item? { playback.nowPlaying }
+    private var length: Double { playback.length ?? 0 }
+    private var position: Double { scrubbing ?? playback.elapsed }
+
+    var body: some View {
+        if let item {
+            VStack(spacing: 6) {
+                HStack(spacing: 12) {
+                    art
+                    titles(item)
+                    Spacer(minLength: 8)
+                    controls
+                    close
+                }
+                scrubber
+            }
+            .padding(.horizontal, 14)
+            .padding(.vertical, 9)
+            .glassPane()
+            .overlay(alignment: .top) { Rectangle().fill(Glass.line).frame(height: 0.5) }
+            .transition(.move(edge: .bottom).combined(with: .opacity))
+        }
+    }
+
+    // MARK: - pieces
+
+    @ViewBuilder private var art: some View {
+        Group {
+            if let image = playback.artwork {
+                Image(uiImage: image).resizable().aspectRatio(contentMode: .fill)
+            } else {
+                // The feed's initials, as the page does when there is no picture: two letters
+                // read as a thing on purpose, where a grey square reads as something missing.
+                ZStack {
+                    Rectangle().fill(Glass.accent.opacity(0.18))
+                    Text(initials).font(.caption.weight(.semibold)).foregroundStyle(Glass.accent)
+                }
+            }
+        }
+        .frame(width: 38, height: 38)
+        .clipShape(RoundedRectangle(cornerRadius: 7, style: .continuous))
+    }
+
+    private var initials: String {
+        let words = (item?.feedTitle ?? "").split(separator: " ").prefix(2)
+        let letters = words.compactMap { $0.first }.map(String.init).joined()
+        return letters.isEmpty ? "?" : letters.uppercased()
+    }
+
+    private func titles(_ item: Playback.Item) -> some View {
+        VStack(alignment: .leading, spacing: 1) {
+            Text(item.title.isEmpty ? "(untitled)" : item.title)
+                .font(.subheadline.weight(.semibold))
+                .foregroundStyle(Glass.text)
+                .lineLimit(1)
+            Text(item.feedTitle)
+                .font(.caption)
+                .foregroundStyle(Glass.dim)
+                .lineLimit(1)
+        }
+    }
+
+    private var controls: some View {
+        HStack(spacing: 14) {
+            // 15 back and 30 forward, the same pair the page and the lock screen use, so every
+            // way of skipping moves by the same amount.
+            button("gobackward.15", "Back 15 seconds") { playback.seek(to: playback.elapsed - 15) }
+            Button {
+                playback.playing ? playback.pause() : playback.play()
+            } label: {
+                Image(systemName: playback.playing ? "pause.circle.fill" : "play.circle.fill")
+                    .font(.system(size: 30))
+                    .symbolRenderingMode(.hierarchical)
+            }
+            .buttonStyle(.plain)
+            .foregroundStyle(Glass.accent)
+            .accessibilityLabel(playback.playing ? "Pause" : "Play")
+            button("goforward.30", "Forward 30 seconds") { playback.seek(to: playback.elapsed + 30) }
+        }
+    }
+
+    private var close: some View {
+        button("xmark", "Close the player") { playback.stop() }
+    }
+
+    private func button(_ symbol: String, _ label: String, _ action: @escaping () -> Void) -> some View {
+        Button(action: action) { Image(systemName: symbol).font(.system(size: 15, weight: .medium)) }
+            .buttonStyle(.plain)
+            .foregroundStyle(Glass.dim)
+            .accessibilityLabel(label)
+    }
+
+    private var scrubber: some View {
+        HStack(spacing: 8) {
+            Text(clock(position)).monospacedDigit()
+            Slider(value: Binding(
+                get: { position },
+                set: { scrubbing = $0 }
+            ), in: 0...max(length, 1), onEditingChanged: { editing in
+                // Seek when the finger lifts, not continuously: seeking on every value sends a
+                // stream of them at a player that is still answering the last one.
+                if !editing, let to = scrubbing {
+                    playback.seek(to: to)
+                    scrubbing = nil
+                }
+            })
+            .disabled(length <= 0)
+            .tint(Glass.accent)
+            Text(clock(length)).monospacedDigit()
+        }
+        .font(.caption2)
+        .foregroundStyle(Glass.faint)
+    }
+
+    /// h:mm:ss once past an hour, m:ss below it, as the page's clock() does.
+    private func clock(_ seconds: Double) -> String {
+        guard seconds.isFinite, seconds >= 0 else { return "0:00" }
+        let total = Int(seconds)
+        let (h, m, s) = (total / 3600, (total % 3600) / 60, total % 60)
+        return h > 0 ? String(format: "%d:%02d:%02d", h, m, s) : String(format: "%d:%02d", m, s)
+    }
+}