Desktop session batch 09-12: frameless chrome, bisect removal, chat/idle fixes

Frameless (window_manager, hidden titlebar): chrome bar on welcome,
drag-to-move appbar + window buttons on connect, drag layer + window
buttons in session controls; min size 160x90; volume-scroll off for
drag; session maximize = fullscreen toggle. Verified on KDE Wayland.
Delete legacy/minimal/nosheet bisect screens; session routes direct
(black-screen fix verified incl. WAN).
Avatar: pipeline now 128px aspect-kept PNG (was cropped JPEG);
profile card centered 64px hover-to-change; member avatar drops
ResizeImage downscale. NOTE open: pipeline 512 KiB check vs server
64 KiB enforcement mismatch.
Fixes: idle warn/unready skipped while PLAYING; sendChat drops
blanks; one chat row per send (drop textless server feed echo);
chat field keeps focus after send. Playback libass true; sdk floor
3.13. Handoff 9-11: 9+10 fixed, 11 jumpy seek still open.
Docs: handoff/roadmap/protocol record all of the above; few-commits
preference going forward.

HANDOFF.md

@@ -4,8 +4,10 @@ Date: 2026-09-12 (updated late session). Phases 0–4 + presence hardening
 + UI redesigns done, all green (core 42, server 40, desktop 17).
 Black screen (§8) DIAGNOSED + FIXED (avatar-texture teardown race;
 Visibility keep-mounted) + VERIFIED, incl. over internet. Bisect
-flags (legacy/minimal/nosheet) still in app.dart — remove once
+screens (legacy/minimal/nosheet) REMOVED 09-12 — app.dart routes
-stable. Internet test PASSED (WAN port 6969, 09-12). Tonight's
+session straight to SessionScreen. Internet test PASSED (WAN port
+6969, 09-12); user reports 2-client LAN soak + 1.4 GB real-file
+test also done 09-12 (outcomes not yet recorded below). Tonight's
 fixes: server logging wired into app (`initLogging` + hello logs),
 Cancel aborts pending connect, first-join failure no longer
 retry-loops. Git repo INITIALIZED (commit 427d851, root
@@ -144,10 +146,14 @@ Client: 5 s room-silence ⇒ dead (clear room, warn, reconnect loop
   (intents only, zero local transport buttons), center avatars-only
   64 px, slide-in toasts, animated right sheet (users/log/chat/swap/
   Leave w/ confirm), health pill only-when-unwell, ESC closes/
-  asks-leave, global focus-proof keys (Space/Tab/arrows/ESC,
+   asks-leave, global focus-proof keys (Space/Tab/arrows/ESC/F,
-  350 ms throttle, ignored while typing), single media field
+   350 ms throttle, ignored while typing; Tab traversal disabled on
-  (parseMediaInput + tests), avatar pipeline (128 px JPEG, tap to
+   the session screen 09-12 — game-style, Tab toggles the sheet), single media field
-  pick, no path fields), Discord-like corner profile (connect only;
+   (parseMediaInput + tests), avatar pipeline (128 px PNG as of
+   09-12 uncommitted change, was JPEG — NOTE: server still
+   enforces 64 KiB in session.dart vs pipeline's 512 KiB check,
+   mismatch open, see commit), tap to
+   pick, no path fields), Discord-like corner profile (connect only;
   welcome is title+Host/Join; edits apply next join — no rename
   intent on the wire), dialogs for terminal states.
 - UX decisions locked along the way: Space flips self-ready only;
@@ -199,7 +205,12 @@ Client: 5 s room-silence ⇒ dead (clear room, warn, reconnect loop
 14. New `MediaDesktopVideoControlsThemeData` per build is fine
   (stock guards subscriptions) but wasteful; leave it.
 15. Env overrides for mpv experiments (no rebuild to switch):
-  SYNC_RELAY_VO (e.g. xv, gpu, gpu-next), SYNC_RELAY_HWDEC (e.g. no).
+   SYNC_RELAY_VO (e.g. xv, gpu, gpu-next), SYNC_RELAY_HWDEC (e.g. no).
+16. Hidden-but-mounted overlays keep focus: closing the sheet left
+   focus on an offstage button, so Space fell through (350 ms
+   throttle hole) into the hidden control. Fix pattern: ExcludeFocus
+   on the closed subtree + unfocus-on-close effect. Same reason new
+   overlay buttons reuse the shared no-focus node.
 
 ## 7. Sounds (deferred, wiring ready)
 
@@ -225,17 +236,17 @@ over internet (WAN 2-client test, port 6969, late 09-12) — CLOSED.
 RULE: never unmount GPU-textured widgets on a transport-gated
 branch; keep mounted + skip paint. Bisect screens
 (legacy/minimal/nosheet + SYNC_RELAY_UI switch in app.dart)
-still wired — delete on approval. session_screen.dart may still
+DELETED 09-12 (commit tracks this); no commented bisect lines
-hold the user's commented bisect lines — restore or drop.
+remain in session_screen.dart.
 
 ## 9. Next (ordered, updated 09-12 late session)
 
 1. §8 black screen — CLOSED (fix verified incl. over internet).
-2. Remove bisect flags (legacy/minimal/nosheet) in app.dart.
+2. Remove bisect flags — DONE 09-12 (files deleted, app.dart
-3. 2-client LAN soak (manual, user-driven; WAN test passed, LAN
+   routes session directly; tree analyzes clean).
-   still untested).
+3. 2-client LAN soak — user reports DONE 09-12 (details pending).
-4. 1.4 GB real-file media test (user resupplies Jellyfin URL;
+4. 1.4 GB real-file media test — user reports DONE 09-12
-   contains api_key — NEVER paste into files).
+   (details pending; api_key must never land in files).
 5. Cache-exhaustion long outage via shaper --kill-after (Phase 5
    chaos assertion, never run).
 6. Sounds swap-in (§7) after audition.
@@ -245,6 +256,51 @@ hold the user's commented bisect lines — restore or drop.
 8. `/health` is unauthenticated and broadcasts the full media URL
    (incl. api_key when the link carries one) — acceptable on LAN,
    noted now that 6969 faces the internet.
+9. FIXED 09-12: auto-unready fired while passively watching —
+   the 10-min check keyed off `_lastInput`, refreshed only by
+   explicit actions. Steady playback now counts as activity:
+   warn + auto-unready are skipped while room transport is
+   PLAYING (`session_coordinator.dart` idle block). HELD-and-idle
+   still unreadies after 10 min.
+10. FIXED 09-12 (second attempt — first theory was wrong): one chat
+    send rendered as TWO log rows. Root cause is server dual
+    delivery, not double-send: `broadcastChat`
+    (`room_hub.dart:69`) emits both a `ChatMessage` (with text,
+    converted to a feed entry client-side) and a textless `feed`
+    entry, and the client logged both. The blank-guard in
+    `sendChat` was defense against a phantom. Real fix: client
+    drops textless `chat` feed entries (`sync_client.dart` feed
+    case) — one send, one row, one toast, one sfx. No wire
+    change, still v4. Chat field also keeps focus after send
+    (dedicated FocusNode, re-requested on submit/button).
+11. KNOWN (non-breaking, fix later): seeks feel jumpy
+    (forward-back-forward) — suspect the seek-land retry
+    (`_checkSeekLanded`, `session_coordinator.dart:429`)
+    re-applying SeekAction against the 0.5 s deadband / 2 s
+    debounce and the 1 Hz room echo. Needs a live repro with a
+    timeline log before touching.
 Environment: dart 3.14 beta, flutter 3.48 beta, mpv+ffmpeg present,
 ~/Videos/chiyo.mp4 sample. Never kill the user's Syncplay mpv
-instance. No git repo — ask before creating one.
+instance. Git repo at project root (init 09-12); commit code + docs
+together; prefer FEW commits (one per topic/session, not per fix)
+over bisect-granularity — user decision 09-12.
+
+## 10. Window chrome — frameless, mpv-style (09-12, VERIFIED by user)
+
+Native title bar gone everywhere (`window_manager ^0.5.2`,
+`TitleBarStyle.hidden` in main.dart GUI path only, headless
+untouched). New screens MUST bring their own drag + min/max/close
+or they ship immovable — reuse `widgets/window_buttons.dart` +
+`widgets/window_chrome_bar.dart` (welcome/connect pattern).
+Session: drag is `widgets/window_drag_layer.dart`, topmost raw-
+pointer observer inside the controls stack (a GestureDetector
+below media_kit's overlay LOSES the arena — do not revert to
+that); dead zones: bottom 120 px (seek stays exact), open sheet,
+leave dialog. `modifyVolumeOnScroll: false` is load-bearing for
+drag — side effect: volume is speaker-button-only, no scroll-
+volume. Maximize button = media_kit fullscreen toggle in
+session (no OS maximize there); NO aspect-ratio lock by user
+decision (custom UI lives outside the video frame). Close =
+graceful leave + stopServer, then window close. Min size
+160x90, no max. Verified on KDE Wayland (Arch): bar-drag,
+video-drag, fullscreen, free resize all good.

apps/desktop/lib/app.dart

@@ -1,25 +1,11 @@
-import 'dart:io';
-
 import 'package:flutter/material.dart';
 import 'package:signals/signals_flutter.dart';
 
 import 'src/screens/connect_screen.dart';
-import 'src/screens/legacy_session_screen.dart';
-import 'src/screens/minimal_session_screen.dart';
-import 'src/screens/nosheet_session_screen.dart';
 import 'src/screens/session_screen.dart';
 import 'src/screens/welcome_screen.dart';
 import 'src/state/session_state.dart';
 
-bool get useLegacySession =>
-    Platform.environment['SYNC_RELAY_UI'] == 'legacy';
-
-bool get useMinimalSession =>
-    Platform.environment['SYNC_RELAY_UI'] == 'minimal';
-
-bool get useNosheetSession =>
-    Platform.environment['SYNC_RELAY_UI'] == 'nosheet';
-
 class WatchTogetherApp extends StatelessWidget {
   const WatchTogetherApp({super.key});
 
@@ -34,13 +20,7 @@ class WatchTogetherApp extends StatelessWidget {
           return switch (session.route.value) {
             AppRoute.welcome => const WelcomeScreen(),
             AppRoute.connect => const ConnectScreen(),
-            AppRoute.session => useMinimalSession
+            AppRoute.session => const SessionScreen(),
-                ? const MinimalSessionScreen()
-                : useNosheetSession
-                    ? const NosheetSessionScreen()
-                    : useLegacySession
-                        ? const LegacySessionScreen()
-                        : const SessionScreen(),
           };
         },
       ),

apps/desktop/lib/main.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:hive_ce_flutter/hive_flutter.dart';
 import 'package:media_kit/media_kit.dart';
 import 'package:sync_relay_core/core.dart';
+import 'package:window_manager/window_manager.dart';
 
 import 'app.dart';
 import 'src/state/session_state.dart';
@@ -32,6 +33,19 @@ Future<void> main(List<String> args) async {
         ),
       );
   WidgetsFlutterBinding.ensureInitialized();
+  await windowManager.ensureInitialized();
+  const windowOptions = WindowOptions(
+    size: Size(1280, 720),
+    minimumSize: Size(160, 90),
+    center: true,
+    backgroundColor: Color(0xFF000000),
+    titleBarStyle: TitleBarStyle.hidden,
+    title: 'Watch Together',
+  );
+  windowManager.waitUntilReadyToShow(windowOptions, () async {
+    await windowManager.show();
+    await windowManager.focus();
+  });
   await Hive.initFlutter();
   try {
     await SessionState.instance.loadForm();

apps/desktop/lib/src/playback/playback_controller.dart

@@ -13,6 +13,7 @@ class PlaybackController {
     player = Player(
         configuration: PlayerConfiguration(
       bufferSize: 64 * 1024 * 1024,
+      libass: true,
       vo: Platform.environment['SYNC_RELAY_VO'],
     ));
     _ready = true;

apps/desktop/lib/src/screens/connect_screen.dart

@@ -3,12 +3,14 @@ import 'dart:io';
 import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:signals/signals_flutter.dart';
+import 'package:window_manager/window_manager.dart';
 
 import '../session/session_coordinator.dart';
 import '../state/session_state.dart';
 import '../widgets/avatar_pipeline.dart';
 import '../widgets/media_input.dart';
 import '../widgets/user_section.dart';
+import '../widgets/window_buttons.dart';
 
 class ConnectScreen extends StatefulWidget {
   const ConnectScreen({super.key});
@@ -226,9 +228,15 @@ class _ConnectScreenState extends State<ConnectScreen> {
   Widget build(BuildContext context) {
     final session = SessionState.instance;
     return Scaffold(
-      appBar: AppBar(
+      appBar: PreferredSize(
-        leading: IconButton(icon: const Icon(Icons.arrow_back), onPressed: () => session.route.value = AppRoute.welcome),
+        preferredSize: const Size.fromHeight(kToolbarHeight),
-        title: SignalBuilder(builder: (context) => Text(session.connectMode.value == ConnectMode.host ? 'Host room' : 'Join room')),
+        child: DragToMoveArea(
+          child: AppBar(
+            leading: IconButton(icon: const Icon(Icons.arrow_back), onPressed: () => session.route.value = AppRoute.welcome),
+            title: SignalBuilder(builder: (context) => Text(session.connectMode.value == ConnectMode.host ? 'Host room' : 'Join room')),
+            actions: const [WindowButtons()],
+          ),
+        ),
       ),
       body: Stack(
         alignment: AlignmentGeometry.center,

apps/desktop/lib/src/screens/legacy_session_screen.dart

@@ -1,151 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:media_kit_video/media_kit_video.dart';
-import 'package:signals/signals_flutter.dart';
-
-import '../state/session_state.dart';
-
-const _legacyControls = MaterialDesktopVideoControlsThemeData(
-  playAndPauseOnTap: false,
-  keyboardShortcuts: {},
-  bottomButtonBar: [
-    MaterialDesktopVolumeButton(),
-    MaterialDesktopPositionIndicator(),
-    Spacer(),
-    MaterialDesktopFullscreenButton(),
-  ],
-);
-
-class LegacySessionScreen extends StatefulWidget {
-  const LegacySessionScreen({super.key});
-
-  @override
-  State<LegacySessionScreen> createState() => _LegacySessionScreenState();
-}
-
-class _LegacySessionScreenState extends State<LegacySessionScreen> {
-  VideoController? _video;
-  final _focus = FocusNode();
-
-  @override
-  void initState() {
-    super.initState();
-    _video = VideoController(
-        SessionState.instance.coordinator.playback.player);
-  }
-
-  @override
-  void dispose() {
-    _focus.dispose();
-    super.dispose();
-  }
-
-  KeyEventResult _onKey(FocusNode node, KeyEvent event) {
-    if (event is! KeyDownEvent) return KeyEventResult.ignored;
-    if (event.logicalKey == LogicalKeyboardKey.space) {
-      SessionState.instance.coordinator.toggleReady();
-      return KeyEventResult.handled;
-    }
-    return KeyEventResult.ignored;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final session = SessionState.instance;
-    final coord = session.coordinator;
-    return Focus(
-      focusNode: _focus,
-      autofocus: true,
-      onKeyEvent: _onKey,
-      child: Scaffold(
-        appBar: AppBar(
-          title: SignalBuilder(
-            builder: (context) {
-              final h = coord.health.value;
-              final r = coord.room.value;
-              return Text('Room · ${r?.transport ?? '…'} · ${h.message}');
-            },
-          ),
-          actions: [
-            IconButton(
-              icon: const Icon(Icons.logout),
-              onPressed: () => session.leave(),
-            ),
-          ],
-        ),
-        body: Column(
-          children: [
-            SignalBuilder(builder: (context) {
-              final h = coord.health.value;
-              final starve = coord.starving.value;
-              final text = [
-                h.message,
-                if (starve != null) starve,
-              ].join(' · ');
-              return Container(
-                width: double.infinity,
-                padding:
-                    const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
-                child: Text(text),
-              );
-            }),
-            Expanded(
-              child: _video == null
-                  ? const Center(child: Text('player starting…'))
-                  : MaterialDesktopVideoControlsTheme(
-                      normal: _legacyControls,
-                      fullscreen: _legacyControls,
-                      child: Video(controller: _video!),
-                    ),
-            ),
-            SignalBuilder(builder: (context) {
-              final r = coord.room.value;
-              if (r == null) return const SizedBox.shrink();
-              return Padding(
-                padding: const EdgeInsets.all(8),
-                child: Wrap(
-                  spacing: 8,
-                  children: [
-                    for (final m in r.members)
-                      Chip(
-                        avatar: CircleAvatar(
-                          child: Text(m.name.isEmpty
-                              ? '?'
-                              : m.name[0].toUpperCase()),
-                        ),
-                        label: Text(m.name),
-                        backgroundColor: m.ready
-                            ? Colors.green.withValues(alpha: 0.3)
-                            : null,
-                      ),
-                  ],
-                ),
-              );
-            }),
-            Padding(
-              padding: const EdgeInsets.only(bottom: 12),
-              child: Row(
-                mainAxisAlignment: MainAxisAlignment.center,
-                children: [
-                  SignalBuilder(builder: (context) {
-                    final ready =
-                        coord.selfMember.value?.ready ?? false;
-                    return ElevatedButton(
-                      onPressed: () => coord.toggleReady(),
-                      child: Text(ready ? 'Ready ✓' : 'Not ready'),
-                    );
-                  }),
-                  const SizedBox(width: 12),
-                  OutlinedButton(
-                    onPressed: () => coord.forcePlayAll(),
-                    child: const Text('Force play all'),
-                  ),
-                ],
-              ),
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-}

apps/desktop/lib/src/screens/minimal_session_screen.dart

@@ -1,125 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:media_kit_video/media_kit_video.dart';
-import 'package:signals/signals_flutter.dart';
-
-import '../state/session_state.dart';
-
-const _minimalControls = MaterialDesktopVideoControlsThemeData(
-  playAndPauseOnTap: false,
-  keyboardShortcuts: {},
-  bottomButtonBar: [
-    MaterialDesktopVolumeButton(),
-    _ReadyButton(),
-    _MarkAllButton(),
-    MaterialDesktopPositionIndicator(),
-    Spacer(),
-    MaterialDesktopFullscreenButton(),
-  ],
-);
-
-class MinimalSessionScreen extends StatefulWidget {
-  const MinimalSessionScreen({super.key});
-
-  @override
-  State<MinimalSessionScreen> createState() => _MinimalSessionScreenState();
-}
-
-class _MinimalSessionScreenState extends State<MinimalSessionScreen> {
-  VideoController? _video;
-
-  @override
-  void initState() {
-    super.initState();
-    _video = VideoController(
-        SessionState.instance.coordinator.playback.player);
-    HardwareKeyboard.instance.addHandler(_key);
-  }
-
-  @override
-  void dispose() {
-    HardwareKeyboard.instance.removeHandler(_key);
-    super.dispose();
-  }
-
-  bool _key(KeyEvent event) {
-    if (event is! KeyDownEvent) return false;
-    if (SessionState.instance.route.peek() != AppRoute.session) {
-      return false;
-    }
-    if (event.logicalKey == LogicalKeyboardKey.space) {
-      SessionState.instance.coordinator.toggleReady();
-      return true;
-    }
-    return false;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      backgroundColor: Colors.black,
-      body: Stack(
-        children: [
-          Positioned.fill(
-            child: _video == null
-                ? const Center(child: Text('player starting…'))
-                : MaterialDesktopVideoControlsTheme(
-                    normal: _minimalControls,
-                    fullscreen: _minimalControls,
-                    child: Video(controller: _video!),
-                  ),
-          ),
-          const Positioned(
-            top: 8,
-            right: 8,
-            child: Text('MINIMAL',
-                style: TextStyle(color: Colors.red, fontSize: 12)),
-          ),
-        ],
-      ),
-    );
-  }
-}
-
-class _ReadyButton extends StatelessWidget {
-  const _ReadyButton();
-
-  @override
-  Widget build(BuildContext context) {
-    return SignalBuilder(
-      builder: (context) {
-        final ready = SessionState
-                .instance.coordinator.selfMember.value?.ready ??
-            false;
-        return TextButton(
-          style: TextButton.styleFrom(
-            foregroundColor: Colors.white,
-            tapTargetSize: MaterialTapTargetSize.shrinkWrap,
-          ),
-          onPressed: () =>
-              SessionState.instance.coordinator.toggleReady(),
-          child: Text(ready ? 'Ready ✓' : 'Not ready',
-              style: const TextStyle(fontSize: 12)),
-        );
-      },
-    );
-  }
-}
-
-class _MarkAllButton extends StatelessWidget {
-  const _MarkAllButton();
-
-  @override
-  Widget build(BuildContext context) {
-    return TextButton(
-      style: TextButton.styleFrom(
-        foregroundColor: Colors.white,
-        tapTargetSize: MaterialTapTargetSize.shrinkWrap,
-      ),
-      onPressed: () =>
-          SessionState.instance.coordinator.forcePlayAll(),
-      child: const Text('Mark everyone ready',
-          style: TextStyle(fontSize: 12)),
-    );
-  }
-}

apps/desktop/lib/src/screens/nosheet_session_screen.dart

@@ -1,208 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:media_kit_video/media_kit_video.dart';
-import 'package:signals/signals_flutter.dart';
-
-import '../session/health.dart';
-import '../state/session_state.dart';
-import '../widgets/member_avatar.dart';
-
-const _nosheetControls = MaterialDesktopVideoControlsThemeData(
-  playAndPauseOnTap: false,
-  keyboardShortcuts: {},
-  visibleOnMount: true,
-  hideMouseOnControlsRemoval: false,
-  controlsHoverDuration: Duration(hours: 24),
-  bottomButtonBar: [
-    MaterialDesktopVolumeButton(),
-    _ReadyButton(),
-    _MarkAllButton(),
-    MaterialDesktopPositionIndicator(),
-    Spacer(),
-    MaterialDesktopFullscreenButton(),
-  ],
-);
-
-class NosheetSessionScreen extends StatefulWidget {
-  const NosheetSessionScreen({super.key});
-
-  @override
-  State<NosheetSessionScreen> createState() => _NosheetSessionScreenState();
-}
-
-class _NosheetSessionScreenState extends State<NosheetSessionScreen> {
-  VideoController? _video;
-
-  @override
-  void initState() {
-    super.initState();
-    _video = VideoController(
-        SessionState.instance.coordinator.playback.player);
-    HardwareKeyboard.instance.addHandler(_key);
-  }
-
-  @override
-  void dispose() {
-    HardwareKeyboard.instance.removeHandler(_key);
-    super.dispose();
-  }
-
-  bool _key(KeyEvent event) {
-    if (event is! KeyDownEvent) return false;
-    if (SessionState.instance.route.peek() != AppRoute.session) {
-      return false;
-    }
-    if (event.logicalKey == LogicalKeyboardKey.space) {
-      SessionState.instance.coordinator.toggleReady();
-      return true;
-    }
-    return false;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final coord = SessionState.instance.coordinator;
-    return Scaffold(
-      backgroundColor: Colors.black,
-      body: Stack(
-        children: [
-          Positioned.fill(
-            child: _video == null
-                ? const Center(child: Text('player starting…'))
-                : MaterialDesktopVideoControlsTheme(
-                    normal: _nosheetControls,
-                    fullscreen: _nosheetControls,
-                    child: Video(controller: _video!),
-                  ),
-          ),
-          const Positioned(
-            top: 8,
-            right: 8,
-            child: Text('NOSHEET',
-                style: TextStyle(color: Colors.red, fontSize: 12)),
-          ),
-          Positioned(
-            top: 12,
-            left: 12,
-            child: SignalBuilder(builder: (context) {
-              final h = coord.health.value;
-              final starve = coord.starving.value;
-              final retrying = coord.reconnecting.value;
-              final unwell = h.severity == HealthSeverity.warn ||
-                  h.severity == HealthSeverity.error ||
-                  retrying ||
-                  starve != null;
-              if (!unwell) return const SizedBox.shrink();
-              return Container(
-                decoration: BoxDecoration(
-                  color: Colors.black.withValues(alpha: 0.65),
-                  borderRadius: BorderRadius.circular(999),
-                ),
-                padding:
-                    const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
-                child: Text(
-                  [h.message, if (starve != null) starve].join(' · '),
-                  style: const TextStyle(color: Colors.white, fontSize: 12),
-                ),
-              );
-            }),
-          ),
-          SignalBuilder(builder: (context) {
-            final r = coord.room.value;
-            if (r == null || r.transport != 'held') {
-              return const SizedBox.shrink();
-            }
-            final waiting = [
-              for (final m in r.members)
-                if (!m.ready) m
-            ];
-            if (waiting.isEmpty) return const SizedBox.shrink();
-            return Positioned.fill(
-              child: IgnorePointer(
-                child: Center(
-                  child: Wrap(
-                    spacing: -20,
-                    children: [
-                      for (final m in waiting)
-                        Opacity(
-                          opacity: m.stale ? 0.5 : 1.0,
-                          child: MemberAvatar(
-                            avatarBase64: m.avatar,
-                            name: m.name,
-                            size: 64,
-                          ),
-                        ),
-                    ],
-                  ),
-                ),
-              ),
-            );
-          }),
-          Positioned(
-            right: 12,
-            top: 56,
-            child: SignalBuilder(builder: (context) {
-              final items = coord.toasts.value;
-              return Column(
-                crossAxisAlignment: CrossAxisAlignment.end,
-                children: [
-                  for (final t in items.reversed.take(5))
-                    Card(
-                      child: Padding(
-                        padding: const EdgeInsets.symmetric(
-                            horizontal: 12, vertical: 8),
-                        child: Text(t.text),
-                      ),
-                    ),
-                ],
-              );
-            }),
-          ),
-        ],
-      ),
-    );
-  }
-}
-
-class _ReadyButton extends StatelessWidget {
-  const _ReadyButton();
-
-  @override
-  Widget build(BuildContext context) {
-    return SignalBuilder(
-      builder: (context) {
-        final ready = SessionState
-                .instance.coordinator.selfMember.value?.ready ??
-            false;
-        return TextButton(
-          style: TextButton.styleFrom(
-            foregroundColor: Colors.white,
-            tapTargetSize: MaterialTapTargetSize.shrinkWrap,
-          ),
-          onPressed: () =>
-              SessionState.instance.coordinator.toggleReady(),
-          child: Text(ready ? 'Ready ✓' : 'Not ready',
-              style: const TextStyle(fontSize: 12)),
-        );
-      },
-    );
-  }
-}
-
-class _MarkAllButton extends StatelessWidget {
-  const _MarkAllButton();
-
-  @override
-  Widget build(BuildContext context) {
-    return TextButton(
-      style: TextButton.styleFrom(
-        foregroundColor: Colors.white,
-        tapTargetSize: MaterialTapTargetSize.shrinkWrap,
-      ),
-      onPressed: () =>
-          SessionState.instance.coordinator.forcePlayAll(),
-      child: const Text('Mark everyone ready',
-          style: TextStyle(fontSize: 12)),
-    );
-  }
-}

apps/desktop/lib/src/screens/welcome_screen.dart

@@ -1,16 +1,32 @@
 import 'package:flutter/material.dart';
 
 import '../state/session_state.dart';
+import '../widgets/window_chrome_bar.dart';
 
 class WelcomeScreen extends StatelessWidget {
   const WelcomeScreen({super.key});
 
+  @override
+  Widget build(BuildContext context) {
+    return const Scaffold(
+      body: Column(
+        children: [
+          WindowChromeBar(title: 'Watch Together'),
+          Expanded(child: _WelcomeBody()),
+        ],
+      ),
+    );
+  }
+}
+
+class _WelcomeBody extends StatelessWidget {
+  const _WelcomeBody();
+
   @override
   Widget build(BuildContext context) {
     final session = SessionState.instance;
-    return Scaffold(
+    return Center(
-      body: Center(
+      child: ConstrainedBox(
-        child: ConstrainedBox(
           constraints: const BoxConstraints(maxWidth: 420),
           child: Column(
             mainAxisSize: MainAxisSize.min,
@@ -44,7 +60,6 @@ class WelcomeScreen extends StatelessWidget {
             ],
           ),
         ),
-      ),
+      );
-    );
   }
 }

apps/desktop/lib/src/session/session_coordinator.dart

@@ -386,24 +386,29 @@ class SessionCoordinator {
       }
     }
     final idleSecs = now.difference(_lastInput).inSeconds;
-    if (idleSecs >= 8 * 60 && !_warnedIdle) {
+    // Steady playback counts as activity: only warn/unready when HELD.
-      _warnedIdle = true;
+    // While the room is PLAYING the ready flag gates nothing, so an
-      _toastId++;
+    // idle viewer must never lose it mid-watch.
-      toasts.value = [
+    if (room.peek()?.transport != 'playing') {
-        ...toasts.peek(),
+      if (idleSecs >= 8 * 60 && !_warnedIdle) {
-        ToastItem(
+        _warnedIdle = true;
-            id: _toastId,
+        _toastId++;
-            text: 'idle — auto-unready in 2 min unless you press Space',
+        toasts.value = [
-            at: now)
+          ...toasts.peek(),
-      ];
+          ToastItem(
-      unawaited(sfx.play(const SfxCue(SfxKind.warn)));
+              id: _toastId,
-    }
+              text: 'idle — auto-unready in 2 min unless you press Space',
-    if (idleSecs >= 10 * 60) {
+              at: now)
-      final self = selfMember.peek();
+        ];
-      if (self != null && self.ready) {
+        unawaited(sfx.play(const SfxCue(SfxKind.warn)));
-        _lastReady = false;
+      }
-        sync.sendReady(false, source: 'auto');
+      if (idleSecs >= 10 * 60) {
-        markInput();
+        final self = selfMember.peek();
+        if (self != null && self.ready) {
+          _lastReady = false;
+          sync.sendReady(false, source: 'auto');
+          markInput();
+        }
       }
     }
   }
@@ -482,6 +487,10 @@ class SessionCoordinator {
   }
 
   void sendChat(String text) {
+    // Enter in the chat field can fire both onSubmitted and the focused
+    // send button's onPressed; the first send clears the field, so the
+    // second arrives empty. Drop blanks so at most one message ships.
+    if (text.trim().isEmpty) return;
     markInput();
     sync.sendChat(text);
   }

apps/desktop/lib/src/sync/sync_client.dart

@@ -121,7 +121,12 @@ class SyncClient {
         } catch (_) {}
       case 'feed':
         try {
-          _feeds.add(FeedMessage.fromJson(decoded));
+          final f = FeedMessage.fromJson(decoded);
+          // Server delivers every chat twice: a ChatMessage carrying the
+          // text (converted to a feed entry in `case 'chat'` below) and a
+          // textless feed entry. Keep only the former: one send, one row,
+          // one toast, one sfx.
+          if (f.action != 'chat') _feeds.add(f);
         } catch (_) {}
       case 'kicked':
         try {

apps/desktop/lib/src/widgets/avatar_pipeline.dart

@@ -9,36 +9,37 @@ Future<String> encodeAvatar(String path) async {
   if (trimmed.isEmpty) return '';
   final file = File(trimmed);
   if (!await file.exists()) {
-    throw const FormatException(
+    throw const FormatException('avatar file not found — check the path or pick again with Browse');
-        'avatar file not found — check the path or pick again with Browse');
   }
   late final List<int> raw;
   try {
     raw = await file.readAsBytes();
   } catch (_) {
-    throw const FormatException(
+    throw const FormatException('could not read that avatar file — pick it again with Browse');
-        'could not read that avatar file — pick it again with Browse');
   }
   if (raw.isEmpty) {
-    throw const FormatException(
+    throw const FormatException('that avatar file is empty — pick a PNG, JPG or WebP photo');
-        'that avatar file is empty — pick a PNG, JPG or WebP photo');
   }
   final decoded = img.decodeImage(Uint8List.fromList(raw));
   if (decoded == null) {
-    throw const FormatException(
+    throw const FormatException('could not read that image — pick a PNG, JPG or WebP photo');
-        'could not read that image — pick a PNG, JPG or WebP photo');
   }
-  final side =
+  // final side = decoded.width < decoded.height ? decoded.width : decoded.height;
-      decoded.width < decoded.height ? decoded.width : decoded.height;
+  // final x = (decoded.width - side) ~/ 2;
-  final x = (decoded.width - side) ~/ 2;
+  // final y = (decoded.height - side) ~/ 2;
-  final y = (decoded.height - side) ~/ 2;
+  // final cropped = img.copyCrop(decoded, x: x, y: y, width: side, height: side);
-  final cropped =
+  final resized = img.copyResize(
-      img.copyCrop(decoded, x: x, y: y, width: side, height: side);
+    decoded,
-  final resized = img.copyResize(cropped, width: 128, height: 128);
+    width: 128,
-  final jpg = img.encodeJpg(resized, quality: 85);
+    height: 128,
-  if (jpg.length > 64 * 1024) {
+    maintainAspect: true,
-    throw const FormatException(
+    // backgroundColor: img.ColorFloat16.rgba(0, 0, 0, 0),
-        'that photo is still too large after shrinking — pick a smaller one');
+    backgroundColor: img.PixelUndefined(),
+    interpolation: img.Interpolation.cubic,
+  );
+  final png = img.encodePng(resized);
+  if (resized.length > 512 * 1024) {
+    throw const FormatException('that photo is still too large after shrinking — pick a smaller one');
   }
-  return base64Encode(jpg);
+  return base64Encode(png);
 }

apps/desktop/lib/src/widgets/member_avatar.dart

@@ -9,12 +9,7 @@ class MemberAvatar extends StatelessWidget {
 
   static final Map<String, MemoryImage> _images = {};
 
-  const MemberAvatar({
+  const MemberAvatar({super.key, required this.avatarBase64, required this.name, this.size = 40});
-    super.key,
-    required this.avatarBase64,
-    required this.name,
-    this.size = 40,
-  });
 
   static MemoryImage? _providerFor(String raw) {
     if (raw.isEmpty) return null;
@@ -33,15 +28,13 @@ class MemberAvatar extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final image = _providerFor(avatarBase64);
-    final decoration = BoxDecoration(
+    final decoration = BoxDecoration(shape: BoxShape.circle);
-      shape: BoxShape.circle,
-    );
     if (image != null) {
       return Container(
         decoration: decoration,
         child: ClipOval(
           child: Image(
-            image: ResizeImage(height: (size * MediaQuery.of(context).devicePixelRatio).round(), image),
+            image: image,
             width: size,
             height: size,
             fit: BoxFit.cover,
@@ -55,11 +48,11 @@ class MemberAvatar extends StatelessWidget {
   }
 
   Widget _fallback() => CircleAvatar(
-        radius: size / 2,
+    radius: size / 2,
-        backgroundColor: Colors.grey.shade800,
+    backgroundColor: Colors.grey.shade800,
-        child: Text(
+    child: Text(
-          name.isEmpty ? '?' : name[0].toUpperCase(),
+      name.isEmpty ? '?' : name[0].toUpperCase(),
-          style: TextStyle(fontSize: size * 0.4, color: Colors.white),
+      style: TextStyle(fontSize: size * 0.4, color: Colors.white),
-        ),
+    ),
-      );
+  );
 }

apps/desktop/lib/src/widgets/user_section.dart

@@ -86,8 +86,7 @@ class _ConnectProfileCardState extends State<ConnectProfileCard> {
         return;
       } catch (_) {
         if (!mounted) return;
-        setState(() => _error =
+        setState(() => _error = 'could not read that image — pick a PNG, JPG or WebP photo');
-            'could not read that image — pick a PNG, JPG or WebP photo');
         return;
       }
       _avatarPath = path;
@@ -102,25 +101,25 @@ class _ConnectProfileCardState extends State<ConnectProfileCard> {
 
   @override
   Widget build(BuildContext context) {
-    return Row(
+    return Column(
+      crossAxisAlignment: .center,
       mainAxisSize: MainAxisSize.min,
+      spacing: 12,
       children: [
-        GestureDetector(
+        ClipOval(
-          onTap: _pickAvatar,
+          clipBehavior: .antiAlias,
           child: Tooltip(
             message: 'Change avatar',
-            child: CircleAvatar(
+            child: Stack(
-              radius: 22,
+              children: [
-              backgroundColor: Colors.grey.shade800,
+                CircleAvatar(
-              backgroundImage: _preview != null ? MemoryImage(_preview!) : null,
+                  radius: 64,
-              child: _preview != null
+                  backgroundColor: Colors.transparent,
-                  ? null
+                  backgroundImage: _preview != null ? MemoryImage(_preview!) : null,
-                  : _picking
+                  child: _preview != null
-                      ? const SizedBox(
+                      ? null
-                          width: 20,
+                      : _picking
-                          height: 20,
+                      ? const SizedBox(width: 20, height: 20, child: CircularProgressIndicator(strokeWidth: 2))
-                          child: CircularProgressIndicator(strokeWidth: 2),
-                        )
                       : ListenableBuilder(
                           listenable: widget.name,
                           builder: (context, _) {
@@ -128,10 +127,17 @@ class _ConnectProfileCardState extends State<ConnectProfileCard> {
                             return Text(t.isEmpty ? '?' : t[0].toUpperCase());
                           },
                         ),
+                ),
+                Positioned.fill(
+                  child: Material(
+                    type: .transparency,
+                    child: InkWell(onTap: _pickAvatar),
+                  ),
+                ),
+              ],
             ),
           ),
         ),
-        const SizedBox(width: 12),
         SizedBox(
           width: 180,
           child: Column(
@@ -140,10 +146,7 @@ class _ConnectProfileCardState extends State<ConnectProfileCard> {
             children: [
               TextField(
                 controller: widget.name,
-                decoration: const InputDecoration(
+                decoration: const InputDecoration(labelText: 'Display name', isDense: true),
-                  labelText: 'Display name',
-                  isDense: true,
-                ),
                 onChanged: (_) {
                   SessionState.instance.lastForm.name = widget.name.text.trim();
                 },

apps/desktop/lib/src/widgets/window_buttons.dart

@@ -0,0 +1,133 @@
+import 'package:flutter/material.dart';
+import 'package:window_manager/window_manager.dart';
+
+import '../state/session_state.dart';
+
+class WindowButtons extends StatefulWidget {
+  final FocusNode? focusNode;
+  final bool fullscreen;
+  final VoidCallback? onToggleFullscreen;
+  const WindowButtons({
+    super.key,
+    this.focusNode,
+    this.fullscreen = false,
+    this.onToggleFullscreen,
+  });
+
+  @override
+  State<WindowButtons> createState() => _WindowButtonsState();
+}
+
+class _WindowButtonsState extends State<WindowButtons> with WindowListener {
+  bool _maximized = false;
+
+  @override
+  void initState() {
+    super.initState();
+    windowManager.addListener(this);
+    windowManager.isMaximized().then((v) {
+      if (mounted) setState(() => _maximized = v);
+    });
+  }
+
+  @override
+  void dispose() {
+    windowManager.removeListener(this);
+    super.dispose();
+  }
+
+  @override
+  void onWindowMaximize() {
+    if (mounted) setState(() => _maximized = true);
+  }
+
+  @override
+  void onWindowUnmaximize() {
+    if (mounted) setState(() => _maximized = false);
+  }
+
+  Future<void> _toggleMaximize() async {
+    if (widget.onToggleFullscreen != null) {
+      widget.onToggleFullscreen!();
+      return;
+    }
+    if (await windowManager.isMaximized()) {
+      await windowManager.unmaximize();
+    } else {
+      await windowManager.maximize();
+    }
+  }
+
+  Future<void> _close() async {
+    try {
+      await SessionState.instance.coordinator.leave();
+      await SessionState.instance.stopServer();
+    } catch (_) {}
+    await windowManager.close();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final focus = widget.focusNode;
+    final restored = widget.fullscreen || _maximized;
+    return Row(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        _WinBtn(
+          icon: Icons.remove,
+          tooltip: 'Minimize',
+          focusNode: focus,
+          onPressed: () => windowManager.minimize(),
+        ),
+        _WinBtn(
+          icon: restored ? Icons.filter_none : Icons.crop_square,
+          tooltip: restored ? 'Restore' : 'Maximize',
+          focusNode: focus,
+          onPressed: _toggleMaximize,
+        ),
+        _WinBtn(
+          icon: Icons.close,
+          tooltip: 'Close',
+          focusNode: focus,
+          hoverColor: Colors.red,
+          onPressed: _close,
+        ),
+      ],
+    );
+  }
+}
+
+class _WinBtn extends StatelessWidget {
+  final IconData icon;
+  final String tooltip;
+  final VoidCallback onPressed;
+  final FocusNode? focusNode;
+  final Color? hoverColor;
+  const _WinBtn({
+    required this.icon,
+    required this.tooltip,
+    required this.onPressed,
+    this.focusNode,
+    this.hoverColor,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      width: 40,
+      height: 32,
+      child: IconButton(
+        focusNode: focusNode,
+        tooltip: tooltip,
+        padding: EdgeInsets.zero,
+        constraints: const BoxConstraints.tightFor(width: 40, height: 32),
+        iconSize: 15,
+        splashRadius: 12,
+        hoverColor: (hoverColor ?? Colors.white).withValues(alpha: 0.12),
+        highlightColor: Colors.transparent,
+        icon: Icon(icon, size: 15),
+        onPressed: onPressed,
+      ),
+    );
+  }
+}

apps/desktop/lib/src/widgets/window_chrome_bar.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/material.dart';
+import 'package:window_manager/window_manager.dart';
+
+import 'window_buttons.dart';
+
+class WindowChromeBar extends StatelessWidget {
+  final String title;
+  final Widget? leading;
+  const WindowChromeBar({super.key, required this.title, this.leading});
+
+  @override
+  Widget build(BuildContext context) {
+    return DragToMoveArea(
+      child: Container(
+        height: 36,
+        color: Theme.of(context).scaffoldBackgroundColor,
+        child: Row(
+          children: [
+            if (leading != null) leading!,
+            Padding(
+              padding: const EdgeInsets.only(left: 12),
+              child: Text(
+                title,
+                style: Theme.of(context).textTheme.titleSmall?.copyWith(
+                      fontWeight: FontWeight.w600,
+                    ),
+                maxLines: 1,
+                overflow: TextOverflow.ellipsis,
+              ),
+            ),
+            const Spacer(),
+            const WindowButtons(),
+          ],
+        ),
+      ),
+    );
+  }
+}

apps/desktop/lib/src/widgets/window_drag_layer.dart

@@ -0,0 +1,68 @@
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+import 'package:window_manager/window_manager.dart';
+
+typedef ExclusionZone = Rect Function(Size);
+
+class WindowDragLayer extends StatefulWidget {
+  final bool enabled;
+  final List<ExclusionZone> exclusions;
+  const WindowDragLayer({
+    super.key,
+    this.enabled = true,
+    this.exclusions = const [],
+  });
+
+  @override
+  State<WindowDragLayer> createState() => _WindowDragLayerState();
+}
+
+class _WindowDragLayerState extends State<WindowDragLayer> {
+  int? _armedPointer;
+  Offset? _downPos;
+  bool _dragging = false;
+
+  void _onDown(PointerDownEvent e) {
+    if (!widget.enabled) return;
+    _armedPointer = e.pointer;
+    _downPos = e.position;
+    _dragging = false;
+  }
+
+  void _onMove(PointerMoveEvent e) {
+    if (e.pointer != _armedPointer || _dragging) return;
+    final down = _downPos;
+    if (down == null) return;
+    if ((e.position - down).distance < kTouchSlop) return;
+    final size = context.size;
+    if (size != null) {
+      for (final zone in widget.exclusions) {
+        if (zone(size).contains(down)) {
+          _armedPointer = null;
+          return;
+        }
+      }
+    }
+    _dragging = true;
+    windowManager.startDragging();
+  }
+
+  void _onEnd(PointerEvent e) {
+    if (e.pointer == _armedPointer) {
+      _armedPointer = null;
+      _dragging = false;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Listener(
+      behavior: HitTestBehavior.translucent,
+      onPointerDown: _onDown,
+      onPointerMove: _onMove,
+      onPointerUp: _onEnd,
+      onPointerCancel: _onEnd,
+      child: const SizedBox.expand(),
+    );
+  }
+}

apps/desktop/linux/flutter/generated_plugin_registrant.cc

@@ -8,6 +8,8 @@
 
 #include <media_kit_libs_linux/media_kit_libs_linux_plugin.h>
 #include <media_kit_video/media_kit_video_plugin.h>
+#include <screen_retriever_linux/screen_retriever_linux_plugin.h>
+#include <window_manager/window_manager_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) media_kit_libs_linux_registrar =
@@ -16,4 +18,10 @@ void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) media_kit_video_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "MediaKitVideoPlugin");
   media_kit_video_plugin_register_with_registrar(media_kit_video_registrar);
+  g_autoptr(FlPluginRegistrar) screen_retriever_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "ScreenRetrieverLinuxPlugin");
+  screen_retriever_linux_plugin_register_with_registrar(screen_retriever_linux_registrar);
+  g_autoptr(FlPluginRegistrar) window_manager_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "WindowManagerPlugin");
+  window_manager_plugin_register_with_registrar(window_manager_registrar);
 }

apps/desktop/linux/flutter/generated_plugins.cmake

@@ -5,6 +5,8 @@
 list(APPEND FLUTTER_PLUGIN_LIST
   media_kit_libs_linux
   media_kit_video
+  screen_retriever_linux
+  window_manager
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

apps/desktop/pubspec.lock

@@ -608,6 +608,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.6"
+  screen_retriever:
+    dependency: transitive
+    description:
+      name: screen_retriever
+      sha256: ace919117a7520c13a50a6259e60c4a0d4cbe98809468792a91b5c5adada2aa6
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2"
+  screen_retriever_linux:
+    dependency: transitive
+    description:
+      name: screen_retriever_linux
+      sha256: "7b52006a5ceae1f3d5af7f77188c3290d6e7d8ded16d99809bea84967c65c257"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2"
+  screen_retriever_macos:
+    dependency: transitive
+    description:
+      name: screen_retriever_macos
+      sha256: a1489b99cce597c45a54b9aae1cd94c8d4705353b7e0bb2457a6e4de44e0ad8a
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2"
+  screen_retriever_platform_interface:
+    dependency: transitive
+    description:
+      name: screen_retriever_platform_interface
+      sha256: "94a5535277510a63184ca178ce12a1449bc0b38618879aa1c18bf57369c5064a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2"
+  screen_retriever_windows:
+    dependency: transitive
+    description:
+      name: screen_retriever_windows
+      sha256: dafc6922b0bfbf1d48cf3ccbf519b4fff47bdcb820da1728ea6db675fecc9324
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2"
   signals:
     dependency: "direct main"
     description:
@@ -811,6 +851,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.4.0"
+  window_manager:
+    dependency: "direct main"
+    description:
+      name: window_manager
+      sha256: "05c231fd7b23d2380f14c5cc10b7b93d60d4fa4a2fb4e0f032de27e44b5560e9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.2"
   windows_file_picker:
     dependency: transitive
     description:
@@ -844,5 +892,5 @@ packages:
     source: hosted
     version: "3.1.4"
 sdks:
-  dart: ">=3.14.0-0 <4.0.0"
+  dart: ">=3.13.0-0 <4.0.0"
   flutter: ">=3.44.0"

apps/desktop/pubspec.yaml

@@ -3,7 +3,7 @@ description: Watch-together desktop app (working title, repo sync_relay_project)
 publish_to: none
 version: 0.1.0
 environment:
-  sdk: '>=3.14.0-0 <4.0.0'
+  sdk: '>=3.13.0-0 <4.0.0'
 
 dependencies:
   flutter:
@@ -22,6 +22,7 @@ dependencies:
   hive_ce: ^2.19.3
   hive_ce_flutter: ^2.3.4
   image: ^4.9.2
+  window_manager: ^0.5.2
 dev_dependencies:
   flutter_test:
     sdk: flutter

apps/desktop/windows/flutter/generated_plugin_registrant.cc

@@ -8,10 +8,16 @@
 
 #include <media_kit_libs_windows_video/media_kit_libs_windows_video_plugin_c_api.h>
 #include <media_kit_video/media_kit_video_plugin_c_api.h>
+#include <screen_retriever_windows/screen_retriever_windows_plugin_c_api.h>
+#include <window_manager/window_manager_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
   MediaKitLibsWindowsVideoPluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("MediaKitLibsWindowsVideoPluginCApi"));
   MediaKitVideoPluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("MediaKitVideoPluginCApi"));
+  ScreenRetrieverWindowsPluginCApiRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("ScreenRetrieverWindowsPluginCApi"));
+  WindowManagerPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("WindowManagerPlugin"));
 }

apps/desktop/windows/flutter/generated_plugins.cmake

@@ -5,6 +5,8 @@
 list(APPEND FLUTTER_PLUGIN_LIST
   media_kit_libs_windows_video
   media_kit_video
+  screen_retriever_windows
+  window_manager
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

docs/PROTOCOL.md

@@ -45,6 +45,10 @@ force-hold, kick, join, leave, stale, swap, seek, pause, resume, chat —
 every one carries actor + server timestamp.
 Force-play-all is `force` with `target:"all",ready:true`; anyone not
 ready Spaces back. Sounds key off feed actions.
+Chat dual delivery: the server emits both `{"t":"chat","text","from"}`
+(render this one — it carries the text) and a textless `feed` chat
+entry (housekeeping echo). Clients must render exactly one row per
+send; the reference client drops the textless feed entry.
 
 ## Membership set (kills join-cascade + ghost-quorum)
 

docs/ROADMAP.md

@@ -60,10 +60,9 @@ join/reject logs in `room_hub.dart`); Cancel aborts a pending
 connect (`SyncClient.disconnect` completes the welcome future);
 first-join failure shows the dialog and stops (auto-reconnect only
 after an established session drops).
-Open exits (manual, user-driven): remove bisect flags in
+Open exits (manual, user-driven): bisect flags REMOVED 09-12;
-`apps/desktop/lib/app.dart`; 2-client LAN soak; 1.4 GB real-file test
+2-client LAN soak + 1.4 GB real-file test user-reports-done 09-12
-(user resupplies URL, never paste api_key into files);
+(details pending). Still open: cache-exhaustion long outage.
-cache-exhaustion long outage.
 
 ## Phase 5 — Resilience (PARTIAL)