fix(calls): app-wide call bar honours room camera/screenshare policy

The persistent call-status bar exposed Video and ScreenShare with no
io.lotus.room_quality check and no share confirmation, bypassing the
in-room bar's gating. Add useRoomCallPolicy and apply the same hiding
plus a "Share your screen?" confirm.

Fixes #26

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA

src/app/features/call-status/CallControl.tsx

@@ -1,11 +1,25 @@
-import { Box, Chip, Icon, IconButton, Icons, Spinner, Text, Tooltip, TooltipProvider } from 'folds';
-import React, { useCallback } from 'react';
+import {
+  Box,
+  Button,
+  Chip,
+  color,
+  config,
+  Icon,
+  IconButton,
+  Icons,
+  Spinner,
+  Text,
+  Tooltip,
+  TooltipProvider,
+} from 'folds';
+import React, { useCallback, useEffect, useState } from 'react';
 import { useSetAtom } from 'jotai';
 import { StatusDivider } from './components';
 import { CallEmbed, useCallControlState } from '../../plugins/call';
 import { AsyncStatus, useAsyncCallback } from '../../hooks/useAsyncCallback';
 import { callEmbedAtom } from '../../state/callEmbed';
 import { MobileTouchTarget } from '../../styles/mobile.css';
+import { useRoomCallPolicy } from '../../hooks/useRoomCallPolicy';
 
 type MicrophoneButtonProps = {
   enabled: boolean;
@@ -177,6 +191,23 @@ export function CallControl({
   const { microphone, video, sound, screenshare } = useCallControlState(callEmbed.control);
   const setCallEmbed = useSetAtom(callEmbedAtom);
 
+  // [Gitea #26] Apply the same room-level camera/screenshare policy as the
+  // in-room CallControls bar, so the status bar can't be used to bypass it.
+  const { allowCamera, allowScreenshare } = useRoomCallPolicy(callEmbed.room);
+  // Keep a forbidden control visible while its track is still live (so the user
+  // can stop it); otherwise hide it entirely.
+  const showCamera = allowCamera || video;
+  const showScreenshare = allowScreenshare || screenshare;
+  const [shareConfirm, setShareConfirm] = useState(false);
+  useEffect(() => {
+    if (!shareConfirm) return undefined;
+    const onKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') setShareConfirm(false);
+    };
+    window.addEventListener('keydown', onKeyDown);
+    return () => window.removeEventListener('keydown', onKeyDown);
+  }, [shareConfirm]);
+
   const handleMicrophoneToggle = useCallback(
     () => callEmbed.control.toggleMicrophone(),
     [callEmbed],
@@ -198,7 +229,65 @@ export function CallControl({
   };
 
   return (
-    <Box shrink="No" alignItems="Center" gap="300">
+    <Box shrink="No" alignItems="Center" gap="300" style={{ position: 'relative' }}>
+      {shareConfirm && (
+        <>
+          <div
+            style={{ position: 'fixed', inset: 0, zIndex: 99 }}
+            onClick={() => setShareConfirm(false)}
+            aria-hidden="true"
+          />
+          <Box
+            style={{
+              position: 'absolute',
+              bottom: '110%',
+              left: 0,
+              background: color.Surface.Container,
+              border: `${config.borderWidth.B300} solid ${color.Surface.ContainerLine}`,
+              borderRadius: '0.75rem',
+              padding: '1rem 1.25rem',
+              zIndex: 100,
+              minWidth: '260px',
+              maxWidth: `calc(100vw - 2 * ${config.space.S400})`,
+              boxShadow: '0 8px 32px rgba(0,0,0,0.35)',
+              display: 'flex',
+              flexDirection: 'column',
+              gap: '0.75rem',
+            }}
+          >
+            <Text size="T300" style={{ fontWeight: 600 }}>
+              Share your screen?
+            </Text>
+            <Text size="T200" style={{ opacity: 0.75 }}>
+              Your screen will be visible to all participants in this call.
+            </Text>
+            <Box gap="200">
+              <Button
+                size="300"
+                variant="Success"
+                fill="Solid"
+                radii="300"
+                onClick={() => {
+                  callEmbed.control.toggleScreenshare();
+                  setShareConfirm(false);
+                }}
+              >
+                <Text size="B300">Share</Text>
+              </Button>
+              <Button
+                size="300"
+                variant="Secondary"
+                fill="Soft"
+                radii="300"
+                outlined
+                onClick={() => setShareConfirm(false)}
+              >
+                <Text size="B300">Cancel</Text>
+              </Button>
+            </Box>
+          </Box>
+        </>
+      )}
       <Box alignItems="Inherit" gap="200">
         <MicrophoneButton
           enabled={microphone}
@@ -210,12 +299,16 @@ export function CallControl({
           onToggle={() => callEmbed.control.toggleSound()}
           disabled={!callJoined}
         />
-        {!compact && <StatusDivider />}
-        <VideoButton enabled={video} onToggle={handleVideoToggle} disabled={!callJoined} />
-        {!compact && (
+        {!compact && (showCamera || showScreenshare) && <StatusDivider />}
+        {showCamera && (
+          <VideoButton enabled={video} onToggle={handleVideoToggle} disabled={!callJoined} />
+        )}
+        {!compact && showScreenshare && (
           <ScreenShareButton
             enabled={screenshare}
-            onToggle={() => callEmbed.control.toggleScreenshare()}
+            onToggle={() =>
+              screenshare ? callEmbed.control.toggleScreenshare() : setShareConfirm(true)
+            }
             disabled={!callJoined}
           />
         )}

src/app/hooks/useRoomCallPolicy.ts

@@ -0,0 +1,28 @@
+import { Room } from 'matrix-js-sdk';
+import { useMemo } from 'react';
+import { useStateEvent } from './useStateEvent';
+import { StateEvent } from '../../types/matrix/room';
+import { RoomQualityContent } from '../utils/callQuality';
+
+export type RoomCallPolicy = {
+  allowCamera: boolean;
+  allowScreenshare: boolean;
+};
+
+/**
+ * [Gitea #26] Shared room-level camera/screenshare policy, read from the
+ * `io.lotus.room_quality` state event. Absent/true = allowed; only an explicit
+ * `false` forbids. Hoisted out of `CallControls` so other call surfaces (e.g.
+ * the app-wide `CallStatus` bar) can apply the same gating.
+ */
+export const useRoomCallPolicy = (room: Room): RoomCallPolicy => {
+  const roomQualityEvent = useStateEvent(room, StateEvent.LotusRoomQuality);
+
+  return useMemo(() => {
+    const roomQuality = roomQualityEvent?.getContent<RoomQualityContent>();
+    return {
+      allowCamera: roomQuality?.allow_camera !== false,
+      allowScreenshare: roomQuality?.allow_screenshare !== false,
+    };
+  }, [roomQualityEvent]);
+};