Floatplane channel plugin for Jellyfin 10.10.x: browse, HLS proxy, cookie session, CI release

- IChannel: creators -> sub-channels -> video posts (public listing API, search mapped)
- IRequiresMediaInfoCallback -> signed proxy URLs; stream controller rewrites HLS so the
  AES-128 key is fetched server-side with the session cookie, segments stay on the CDN
- delivery/info cached per token lifetime and throttled (~2/min)
- config page: paste sails.sid + validate, extra creators, quality, search test
- scripts/package.sh -> plugin folder + zip + md5 + manifest.json; Gitea release workflow
- research docs, HAR analysis (HAR itself gitignored), install-pi5.sh

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

doc/research/reference-sources/floaty_live_status_provider.dart

@@ -0,0 +1,55 @@
+import 'dart:async';
+import 'package:flutter_riverpod/legacy.dart';
+
+class LiveStatusNotifier extends StateNotifier<String> {
+  Timer? _timer;
+  final String? lastLiveTime;
+
+  LiveStatusNotifier(this.lastLiveTime) : super('') {
+    _updateOfflineTime();
+    _timer = Timer.periodic(const Duration(minutes: 1), (_) {
+      _updateOfflineTime();
+    });
+  }
+
+  void _updateOfflineTime() {
+    if (lastLiveTime == null || lastLiveTime!.isEmpty) {
+      state = '';
+      return;
+    }
+
+    final lastLive = DateTime.tryParse(lastLiveTime!);
+    if (lastLive == null) {
+      state = '';
+      return;
+    }
+
+    DateTime unixTime = DateTime.now();
+    DateTime isoTime = DateTime.parse(lastLiveTime!);
+
+    Duration diff = unixTime.difference(isoTime).abs();
+
+    int days = diff.inDays;
+    int hours = diff.inHours.remainder(24);
+    int minutes = diff.inMinutes.remainder(60);
+
+    List<String> parts = [];
+    if (days > 0) parts.add("$days day${days > 1 ? 's' : ''}");
+    if (hours > 0) parts.add("$hours hour${hours > 1 ? 's' : ''}");
+    if (minutes > 0) parts.add("$minutes minute${minutes > 1 ? 's' : ''}");
+
+    state = parts.isNotEmpty ? parts.join(" ") : "just now";
+  }
+
+  @override
+  void dispose() {
+    _timer?.cancel();
+    super.dispose();
+  }
+}
+
+final liveStatusProvider =
+    StateNotifierProvider.family<LiveStatusNotifier, String, String?>(
+        (ref, lastLiveTime) {
+  return LiveStatusNotifier(lastLiveTime);
+});