Merge pull request 'fix(location): confirm before sharing, with accuracy and an approximate option (#340)' (#353) from fix/location-confirm into lotus

The composer's location button sent the exact position (6 decimals) from a
single click once the browser permission had been granted, discarding the
fix's accuracy, so a ±3.5 km Wi-Fi/IP fix was shown as exact.

- ShareLocationDialog: "Share your location?" with the coordinates and
  ±accuracy, a "Check on OpenStreetMap" link, and Cancel / Send
  approximate (~1 km) / Send. Focus starts on Cancel; Esc cancels.
- utils/geoShare.ts (unit-tested): RFC 5870 geo URI with `;u=` accuracy;
  approximate shares round to 2 decimals and never claim better than 1 km.
- Location cards show the ± when the event carries `u=`.
- The toolbar icon is a pin instead of the globe.

Verified headless (fix 40.748817,-73.985428 ±3500 m): the click opens the
dialog and sends nothing; Cancel/Esc send nothing; Send approximate →
geo:40.75,-73.99;u=3500; Send → geo:40.748817,-73.985428;u=3500; the card
reads "40.74882, -73.98543 (±3.5 km)".

Fixes #340

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

.cinny-config.json.bak

@@ -1,17 +0,0 @@
-{
-  "defaultHomeserver": 0,
-  "homeserverList": [
-    "matrix.lotusguild.org"
-  ],
-  "allowCustomHomeservers": false,
-  "featuredCommunities": {
-    "openAsDefault": false,
-    "spaces": [],
-    "rooms": [],
-    "servers": []
-  },
-  "hashRouter": {
-    "enabled": false,
-    "basename": "/"
-  }
-}

.gitignore

@@ -14,3 +14,6 @@ test-results/
 # local dev homeserver (scripts/dev-homeserver.sh)
 .dev-homeserver/
 __pycache__/
+
+# Local config backups
+*.bak

e2e/security-nudge.spec.ts

@@ -0,0 +1,74 @@
+import { test, expect, Page } from '@playwright/test';
+import { HS, ensureUser, hsReachable, loginUI, TestUser, uniq } from './localHs';
+
+// [Gitea #110, #123] The device-security nudge. A fresh account has no key
+// backup and no cross-signing → "Set up key backup", but only after the 24 h
+// grace period on this device; "Not now" snoozes it.
+const strip = (page: Page) => page.getByRole('status').filter({ hasText: /encryption keys/ });
+
+/** Back-date this device's first-seen record past the 24 h grace period, then reload. */
+async function pastGrace(page: Page) {
+  await page.evaluate(() => {
+    const { deviceId } = JSON.parse(localStorage.getItem('cinny_session_v1') ?? '{}');
+    localStorage.setItem(
+      `lotus-security-nudge-${deviceId}`,
+      JSON.stringify({ firstSeen: Date.now() - 2 * 86_400_000, dismissals: {} }),
+    );
+  });
+  await page.reload();
+}
+
+/** The nudge waits until sync has settled (after "Connecting…"). */
+async function settled(page: Page) {
+  await page
+    .getByText('Connecting...')
+    .first()
+    .waitFor({ timeout: 30_000 })
+    .catch(() => undefined);
+  await page.getByText('Connecting...').first().waitFor({ state: 'detached', timeout: 90_000 });
+  await page.waitForTimeout(2000);
+}
+
+test.describe('security nudge (#110, #123)', () => {
+  let user: TestUser;
+
+  test.beforeAll(async () => {
+    test.skip(!(await hsReachable()), `no local homeserver at ${HS} (set E2E_LOCAL_HS)`);
+  });
+
+  test.beforeEach(async () => {
+    user = await ensureUser(uniq('e2e_nudge_'));
+  });
+
+  test('nothing during the first 24 h on a device', async ({ page }) => {
+    test.setTimeout(150_000);
+    await loginUI(page, user);
+    await settled(page);
+    // Past the point where the nudge shows once the grace period is over (~5 s).
+    await page.waitForTimeout(8000);
+    await expect(strip(page)).toHaveCount(0);
+  });
+
+  test('no key backup: "Set up key backup" opens Settings → Devices', async ({ page }) => {
+    test.setTimeout(150_000);
+    await loginUI(page, user);
+    await pastGrace(page);
+    await settled(page);
+    const nudge = strip(page);
+    await expect(nudge).toContainText("Your encryption keys aren't backed up");
+    await nudge.getByRole('button', { name: 'Set up' }).click();
+    await expect(page.getByText('Device Verification').first()).toBeVisible();
+  });
+
+  test('"Not now" snoozes it across a reload', async ({ page }) => {
+    test.setTimeout(200_000);
+    await loginUI(page, user);
+    await pastGrace(page);
+    await settled(page);
+    await strip(page).getByRole('button', { name: 'Not now' }).click();
+    await expect(strip(page)).toHaveCount(0);
+    await page.reload();
+    await settled(page);
+    await expect(strip(page)).toHaveCount(0);
+  });
+});

package-lock.json

@@ -45,12 +45,12 @@
         "html-react-parser": "6.1.2",
         "i18next": "26.2.0",
         "i18next-browser-languagedetector": "8.2.1",
-        "i18next-http-backend": "4.0.0",
+        "i18next-http-backend": "4.0.2",
         "immer": "11.1.8",
         "is-hotkey": "0.2.0",
         "jotai": "2.20.0",
         "jsqr": "1.4.0",
-        "katex": "0.16.47",
+        "katex": "0.18.11",
         "linkify-react": "4.3.3",
         "linkifyjs": "4.3.3",
         "matrix-js-sdk": "41.7.0",
@@ -8168,9 +8168,9 @@
       }
     },
     "node_modules/i18next-http-backend": {
-      "version": "4.0.0",
+      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/i18next-http-backend/-/i18next-http-backend-4.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/i18next-http-backend/-/i18next-http-backend-4.0.2.tgz",
-      "integrity": "sha512-EgSjO3Q1G6f2Q5oy7u9mmxuesE0oSfzAD97NFBjC8EmkK4guBSYLljM0Fng3DarMWIIkU70jfo4+mUzmyVISTA==",
+      "integrity": "sha512-oay62dIB2kL7+WHzoUXBjWfL3+mwijD3pQkQkIEaRLhy6kjXxUhrRenV0gInwlCASAaJaDy94+XvYizK+cAGdA==",
       "license": "MIT",
       "engines": {
         "node": ">=18"
@@ -9162,28 +9162,29 @@
       }
     },
     "node_modules/katex": {
-      "version": "0.16.47",
+      "version": "0.18.11",
-      "resolved": "https://registry.npmjs.org/katex/-/katex-0.16.47.tgz",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.18.11.tgz",
-      "integrity": "sha512-Eeo8Ys1doU1z+x8AZsPpQu+p/QcZBI5PeOo7QGQdy2x2m0MU/hYagBbGOmXwr5KVbEfVuWv9LpnQWeehogurjg==",
+      "integrity": "sha512-yvyz/2VMKqoho/35Hat5w37wIEdWJ5ElVMidTAlWrxr5uW4aBGsEpveTmKh18/zw08v/7lGswCPon4OhqmqrTA==",
+      "deprecated": "Accidentally published with breaking changes. Use 0.19.0 instead.",
       "funding": [
         "https://opencollective.com/katex",
         "https://github.com/sponsors/katex"
       ],
       "license": "MIT",
       "dependencies": {
-        "commander": "^8.3.0"
+        "commander": "^15.0.0"
       },
       "bin": {
         "katex": "cli.js"
       }
     },
     "node_modules/katex/node_modules/commander": {
-      "version": "8.3.0",
+      "version": "15.0.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-8.3.0.tgz",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-15.0.0.tgz",
-      "integrity": "sha512-OkTL9umf+He2DZkUq8f8J9of7yL6RJKI24dVITBmNfZBmri9zYZQrKkuXiKhyfPSu8tUhnVBB1iKXevvnlR4Ww==",
+      "integrity": "sha512-z67u4ZhzCL/Tydu1lJARtEZYWbWaN7oYLHbsuzocr6y4N6WZAagG3RQ4FW61V1/0+jImpj293XfrcYnd1qxtPg==",
       "license": "MIT",
       "engines": {
-        "node": ">= 12"
+        "node": ">=22.12.0"
       }
     },
     "node_modules/keyv": {
@@ -12164,9 +12165,10 @@
       }
     },
     "node_modules/source-map-js": {
-      "version": "1.2.1",
+      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.2.tgz",
-      "integrity": "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==",
+      "integrity": "sha512-KGj/8Y43x35aZVDtt+J4mK1hoLGHULMYfSkODJNQjNDC3oW1PqPoxMwo0pLUsWM/UEGzON/NxeHywEfNXNP3Vw==",
+      "license": "BSD-3-Clause",
       "engines": {
         "node": ">=0.10.0"
       }

package.json

@@ -72,12 +72,12 @@
     "html-react-parser": "6.1.2",
     "i18next": "26.2.0",
     "i18next-browser-languagedetector": "8.2.1",
-    "i18next-http-backend": "4.0.0",
+    "i18next-http-backend": "4.0.2",
     "immer": "11.1.8",
     "is-hotkey": "0.2.0",
     "jotai": "2.20.0",
     "jsqr": "1.4.0",
-    "katex": "0.16.47",
+    "katex": "0.18.11",
     "linkify-react": "4.3.3",
     "linkifyjs": "4.3.3",
     "matrix-js-sdk": "41.7.0",

src/app/components/message/MsgTypeRenderers.tsx

@@ -37,6 +37,7 @@ import {
 } from '../../../types/matrix/common';
 import { FALLBACK_MIMETYPE, getBlobSafeMimeType } from '../../utils/mimeTypes';
 import { parseGeoUri, scaleYDimension } from '../../utils/common';
+import { formatAccuracy } from '../../utils/geoShare';
 import { Attachment, AttachmentBox, AttachmentContent, AttachmentHeader } from './attachment';
 import { FileHeader, FileDownloadButton } from './FileHeader';
 
@@ -732,6 +733,8 @@ export function MLocation({ content }: MLocationProps) {
   const lon = parseFloat(location.longitude);
   if (!isFinite(lat) || !isFinite(lon)) return <BrokenContent />;
   const description = typeof msc3488?.description === 'string' ? msc3488.description : undefined;
+  // RFC 5870 `;u=` uncertainty (meters), sent by Lotus since Gitea #340.
+  const accuracyLabel = formatAccuracy(Number(/;u=([\d.]+)/.exec(geoUri)?.[1]));
   const mapSrc = `https://www.openstreetmap.org/export/embed.html?bbox=${lon - 0.007},${
     lat - 0.004
   },${lon + 0.007},${lat + 0.004}&layer=mapnik&marker=${lat},${lon}`;
@@ -772,6 +775,7 @@ export function MLocation({ content }: MLocationProps) {
       )}
       <Text size="T300" priority="300">
         {`${lat.toFixed(5)}, ${lon.toFixed(5)}`}
+        {accuracyLabel && ` (${accuracyLabel})`}
       </Text>
       <Button
         as="a"

src/app/components/url-preview/UrlPreview.css.tsx

@@ -1,5 +1,6 @@
 import { keyframes, style } from '@vanilla-extract/css';
 import { DefaultReset, color, config, toRem } from 'folds';
+import { GIF_PREVIEW_MAX_HEIGHT } from '../../utils/gifPreviewSize';
 
 export const UrlPreview = style([
   DefaultReset,
@@ -955,12 +956,14 @@ export const PortraitSideLayout = style([
 // GIF card (Giphy / Tenor)
 // ---------------------------------------------------------------------------
 
+// Full card width; a GIF narrower than the card (portrait, square, small) is
+// centred on the surface colour instead of being stretched and cropped.
 export const GifThumbnailWrapper = style([
   DefaultReset,
   {
-    position: 'relative',
+    display: 'flex',
+    justifyContent: 'center',
     width: '100%',
-    maxHeight: toRem(200),
     overflow: 'hidden',
     flexShrink: 0,
     backgroundColor: color.Surface.Container,
@@ -972,14 +975,26 @@ export const GifThumbnailWrapper = style([
   },
 ]);
 
+// Wraps just the GIF so the "GIF" badge sits on the GIF's own corner.
+export const GifFrame = style([
+  DefaultReset,
+  {
+    position: 'relative',
+    display: 'block',
+    maxWidth: '100%',
+  },
+]);
+
+// The inline width/aspect-ratio (from og:image:width/height) sets the size;
+// max-width lets a phone's narrower card shrink it, keeping the ratio.
 export const GifThumbnailImg = style([
   DefaultReset,
   {
-    width: '100%',
-    maxHeight: toRem(200),
-    objectFit: 'cover',
-    objectPosition: 'center',
     display: 'block',
+    maxWidth: '100%',
+    maxHeight: toRem(GIF_PREVIEW_MAX_HEIGHT),
+    height: 'auto',
+    objectFit: 'contain',
   },
 ]);
 

src/app/components/url-preview/UrlPreviewCard.tsx

@@ -13,6 +13,7 @@ import {
   as,
   color,
   config,
+  toRem,
 } from 'folds';
 import { ImageOverlay } from '../ImageOverlay';
 import { MobileTouchTarget } from '../../styles/mobile.css';
@@ -48,6 +49,11 @@ import {
   tiktokOembedUrl,
   tiktokPlayerEmbedUrl,
 } from '../../utils/videoEmbed';
+import {
+  GIF_PREVIEW_MAX_HEIGHT,
+  GIF_PREVIEW_MAX_WIDTH,
+  gifPreviewBox,
+} from '../../utils/gifPreviewSize';
 
 const linkStyles = { color: color.Success.Main };
 
@@ -2277,6 +2283,9 @@ function GifCard({
 }) {
   const title = (prev['og:title'] as string | undefined) ?? '';
   const mxcImage = prev['og:image'] as string | undefined;
+  // Size the GIF from its own dimensions (Giphy and Tenor publish them) rather
+  // than forcing every GIF into one cropped band.
+  const box = gifPreviewBox(prev['og:image:width'], prev['og:image:height']);
 
   // A GIF card exists to show a moving GIF, so request the original rather than
   // a thumbnail — the thumbnail endpoint would return a frozen first frame.
@@ -2284,7 +2293,15 @@ function GifCard({
   const thumbSrc = mxcImage
     ? shouldServeGifOriginal(url, prev)
       ? mxcUrlToHttp(mx, mxcImage, useAuthentication)
-      : mxcUrlToHttp(mx, mxcImage, useAuthentication, 400, 200, 'scale', false)
+      : mxcUrlToHttp(
+          mx,
+          mxcImage,
+          useAuthentication,
+          GIF_PREVIEW_MAX_WIDTH * 2,
+          GIF_PREVIEW_MAX_HEIGHT * 2,
+          'scale',
+          false,
+        )
     : null;
 
   // If there's no image, fall back to a generic-style layout
@@ -2316,7 +2333,9 @@ function GifCard({
 
   return (
     <Box direction="Column" style={{ width: '100%' }}>
-      {/* GIF thumbnail — full width */}
+      {/* The whole GIF at its own aspect ratio, centred; never cropped. With a
+          known size the box is reserved before it loads (no layout jump);
+          without one it shows at its natural size, capped by the card. */}
       <a
         href={url}
         target="_blank"
@@ -2324,8 +2343,22 @@ function GifCard({
         className={previewCss.GifThumbnailWrapper}
         aria-label={`View GIF on ${siteBadgeLabel}: ${title}`}
       >
-        <img className={previewCss.GifThumbnailImg} src={thumbSrc} alt={title} loading="lazy" />
+        <span className={previewCss.GifFrame}>
-        <span className={previewCss.GifBadge}>GIF</span>
+          <img
+            className={previewCss.GifThumbnailImg}
+            src={thumbSrc}
+            alt={title}
+            loading="lazy"
+            width={box?.width}
+            height={box?.height}
+            style={
+              box
+                ? { width: toRem(box.width), aspectRatio: `${box.width} / ${box.height}` }
+                : undefined
+            }
+          />
+          <span className={previewCss.GifBadge}>GIF</span>
+        </span>
       </a>
       {/* Footer row */}
       <UrlPreviewContent>

src/app/features/room/RoomInput.tsx

@@ -153,6 +153,9 @@ import { useRoomUnverifiedDeviceCount } from '../../hooks/useDeviceVerificationS
 import { ScheduleMessageModal } from './ScheduleMessageModal';
 import { ScheduledMessagesTray } from './ScheduledMessagesTray';
 import { DraftIndicator } from './DraftIndicator';
+import { PendingLocation, ShareLocationDialog } from './ShareLocationDialog';
+import { buildGeoUri } from '../../utils/geoShare';
+import { useLocalRoomName } from '../../hooks/useRoomMeta';
 import { scheduledMessagesAtom } from '../../state/scheduledMessages';
 import { createErrorToast, toastQueueAtom } from '../../state/toast';
 import { getThreadDraftKey } from '../../state/room/thread';
@@ -356,6 +359,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
       () => normalizeComposerToolbarOrder(composerToolbarButtons?.order),
       [composerToolbarButtons?.order],
     );
+    const displayRoomName = useLocalRoomName(room);
     const [locating, setLocating] = React.useState(false);
     const [locationError, setLocationError] = React.useState<string | null>(null);
     const handleShareLocation = useCallback(() => {
@@ -368,21 +372,9 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
       navigator.geolocation.getCurrentPosition(
         (pos) => {
           setLocating(false);
-          const { latitude, longitude } = pos.coords;
+          // [Gitea #340] Don't send straight away: confirm first (ShareLocationDialog).
-          const geoUri = `geo:${latitude.toFixed(6)},${longitude.toFixed(6)}`;
+          const { latitude, longitude, accuracy } = pos.coords;
-          const ts = Date.now();
+          setPendingLocation({ latitude, longitude, accuracy });
-          // MSC3488 extensible location: send the geo_uri (legacy) alongside the
-          // m.location/m.asset/m.ts blocks so Element and other clients render a
-          // proper "shared location" pin instead of falling back to plain text.
-          sendRoomMessage(mx, roomId, threadRootId ?? null, {
-            msgtype: 'm.location',
-            body: `Shared a location: ${geoUri}`,
-            geo_uri: geoUri,
-            'org.matrix.msc3488.location': { uri: geoUri },
-            'org.matrix.msc3488.asset': { type: 'm.self' },
-            'org.matrix.msc3488.ts': ts,
-            'm.ts': ts,
-          });
         },
         (err) => {
           setLocating(false);
@@ -397,7 +389,30 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
         },
         { timeout: 10000 },
       );
-    }, [mx, roomId, threadRootId]);
+    }, []);
+    const [pendingLocation, setPendingLocation] = React.useState<PendingLocation | null>(null);
+    const handleSendLocation = useCallback(
+      (approximate: boolean) => {
+        if (!pendingLocation) return;
+        const { latitude, longitude, accuracy } = pendingLocation;
+        setPendingLocation(null);
+        const geoUri = buildGeoUri(latitude, longitude, accuracy, approximate);
+        const ts = Date.now();
+        // MSC3488 extensible location: send the geo_uri (legacy) alongside the
+        // m.location/m.asset/m.ts blocks so Element and other clients render a
+        // proper "shared location" pin instead of falling back to plain text.
+        sendRoomMessage(mx, roomId, threadRootId ?? null, {
+          msgtype: 'm.location',
+          body: `Shared ${approximate ? 'an approximate' : 'a'} location: ${geoUri}`,
+          geo_uri: geoUri,
+          'org.matrix.msc3488.location': { uri: geoUri },
+          'org.matrix.msc3488.asset': { type: 'm.self' },
+          'org.matrix.msc3488.ts': ts,
+          'm.ts': ts,
+        });
+      },
+      [pendingLocation, mx, roomId, threadRootId],
+    );
 
     const handleVoiceSend = useCallback(
       async (blob: Blob, mimeType: string, durationMs: number, waveform: number[]) => {
@@ -1538,11 +1553,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
                 style={touchTarget}
                 className={MobileTouchTarget}
               >
-                {locating ? (
+                {locating ? <Spinner variant="Secondary" size="400" /> : <Icon src={Icons.Pin} />}
-                  <Spinner variant="Secondary" size="400" />
-                ) : (
-                  <Icon src={Icons.SpaceGlobe} />
-                )}
               </IconButton>
             ) : null;
 
@@ -1751,6 +1762,14 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
             onClose={() => setPollOpen(false)}
           />
         )}
+        {pendingLocation && (
+          <ShareLocationDialog
+            location={pendingLocation}
+            roomName={displayRoomName}
+            onSend={handleSendLocation}
+            requestClose={() => setPendingLocation(null)}
+          />
+        )}
         {scheduleOpen && (
           <ScheduleMessageModal
             roomId={roomId}

src/app/features/room/ShareLocationDialog.tsx

@@ -0,0 +1,124 @@
+import React from 'react';
+import FocusTrap from 'focus-trap-react';
+import {
+  Box,
+  Button,
+  config,
+  Dialog,
+  Header,
+  Icon,
+  IconButton,
+  Icons,
+  Overlay,
+  OverlayBackdrop,
+  OverlayCenter,
+  Text,
+} from 'folds';
+import { useModalStyle } from '../../hooks/useModalStyle';
+import { stopPropagation } from '../../utils/keyboard';
+import { formatAccuracy } from '../../utils/geoShare';
+
+export type PendingLocation = { latitude: number; longitude: number; accuracy?: number };
+
+type ShareLocationDialogProps = {
+  location: PendingLocation;
+  roomName: string;
+  onSend: (approximate: boolean) => void;
+  requestClose: () => void;
+};
+
+/**
+ * [Gitea #340] Confirm step before an m.location is posted: the toolbar button
+ * used to send the exact position from a single click. Shows what will be
+ * shared (coordinates + the fix's accuracy) and offers an approximate share.
+ */
+export function ShareLocationDialog({
+  location,
+  roomName,
+  onSend,
+  requestClose,
+}: ShareLocationDialogProps) {
+  const modalStyle = useModalStyle(420);
+  const { latitude, longitude, accuracy } = location;
+  const accuracyLabel = formatAccuracy(accuracy);
+  const mapUrl = `https://www.openstreetmap.org/?mlat=${latitude}&mlon=${longitude}#map=16/${latitude}/${longitude}`;
+
+  return (
+    <Overlay open backdrop={<OverlayBackdrop />}>
+      <OverlayCenter>
+        <FocusTrap
+          focusTrapOptions={{
+            initialFocus: '#share-location-cancel',
+            onDeactivate: requestClose,
+            clickOutsideDeactivates: true,
+            escapeDeactivates: stopPropagation,
+          }}
+        >
+          <Dialog
+            role="dialog"
+            aria-modal="true"
+            aria-labelledby="share-location-title"
+            variant="Surface"
+            style={modalStyle}
+          >
+            <Header
+              style={{
+                padding: `0 ${config.space.S200} 0 ${config.space.S400}`,
+                borderBottomWidth: config.borderWidth.B300,
+              }}
+              variant="Surface"
+              size="500"
+            >
+              <Box grow="Yes">
+                <Text id="share-location-title" as="h2" size="H4">
+                  Share your location?
+                </Text>
+              </Box>
+              <IconButton size="300" onClick={requestClose} radii="300" aria-label="Close">
+                <Icon src={Icons.Cross} />
+              </IconButton>
+            </Header>
+            <Box style={{ padding: config.space.S400 }} direction="Column" gap="400">
+              <Text>
+                Everyone in <b>{roomName}</b> will see this position, and it can&apos;t be taken
+                back from their devices once sent.
+              </Text>
+              <Box direction="Column" gap="100">
+                <Text size="T400">
+                  <b>
+                    {latitude.toFixed(5)}, {longitude.toFixed(5)}
+                  </b>
+                  {accuracyLabel && ` (${accuracyLabel})`}
+                </Text>
+                <Text size="T200" priority="300">
+                  {accuracyLabel
+                    ? 'The ± is how sure your device is of this position.'
+                    : 'Your device did not say how accurate this position is.'}{' '}
+                  <a href={mapUrl} target="_blank" rel="noreferrer noopener">
+                    Check on OpenStreetMap
+                  </a>
+                </Text>
+              </Box>
+              <Box gap="200" justifyContent="End" wrap="Wrap">
+                <Button
+                  id="share-location-cancel"
+                  variant="Secondary"
+                  fill="Soft"
+                  onClick={requestClose}
+                >
+                  <Text size="B400">Cancel</Text>
+                </Button>
+                <Button variant="Secondary" fill="Soft" onClick={() => onSend(true)}>
+                  <Text size="B400">Send approximate (~1 km)</Text>
+                </Button>
+                <Button variant="Primary" onClick={() => onSend(false)}>
+                  <Text size="B400">Send</Text>
+                </Button>
+              </Box>
+            </Box>
+          </Dialog>
+        </FocusTrap>
+      </OverlayCenter>
+    </Overlay>
+  );
+}

src/app/features/security-nudge/SecurityBanner.tsx

@@ -0,0 +1,137 @@
+import React, { useCallback, useEffect, useState } from 'react';
+import { useAtomValue, useSetAtom } from 'jotai';
+import { SyncState } from 'matrix-js-sdk';
+import { CryptoApi } from 'matrix-js-sdk/lib/crypto-api';
+import { Icons } from 'folds';
+import { ErrorBoundary } from 'react-error-boundary';
+import { useMatrixClient } from '../../hooks/useMatrixClient';
+import { useCrossSigningActive } from '../../hooks/useCrossSigning';
+import {
+  useDeviceVerificationStatus,
+  VerificationStatus,
+} from '../../hooks/useDeviceVerificationStatus';
+import { useKeyBackupInfo, useKeyBackupStatusChange } from '../../hooks/useKeyBackup';
+import { useAlive } from '../../hooks/useAlive';
+import { useSyncState } from '../../hooks/useSyncState';
+import { settingsRequestAtom } from '../../state/settingsRequest';
+import { serverStatusAtom } from '../../state/serverStatus';
+import { pickBanner } from '../../utils/kumaStatus';
+import {
+  dismissNudge,
+  NUDGE_COPY,
+  NUDGE_KEY_PREFIX,
+  nudgeFor,
+  NudgeRecord,
+  parseNudgeRecord,
+  shouldShowNudge,
+} from '../../utils/securityNudge';
+import { StatusStrip } from '../server-status/ServerStatusBanner';
+
+/** This device's backup connection: undefined until known, then true/false. */
+const useBackupActive = (crypto: CryptoApi): boolean | undefined => {
+  const alive = useAlive();
+  const [active, setActive] = useState<boolean>();
+  useEffect(() => {
+    crypto.getActiveSessionBackupVersion().then((v) => {
+      if (alive()) setActive(typeof v === 'string');
+    });
+  }, [crypto, alive]);
+  useKeyBackupStatusChange(useCallback((enabled: boolean) => setActive(enabled), []));
+  return active;
+};
+
+const readRecord = (key: string): NudgeRecord => {
+  let raw: string | null = null;
+  try {
+    raw = localStorage.getItem(key);
+  } catch {
+    /* storage unavailable */
+  }
+  const record = parseNudgeRecord(raw, Date.now());
+  if (!raw) {
+    try {
+      localStorage.setItem(key, JSON.stringify(record));
+    } catch {
+      /* best effort */
+    }
+  }
+  return record;
+};
+
+function SecurityBannerFor({ crypto }: { crypto: CryptoApi }) {
+  const mx = useMatrixClient();
+  const deviceId = mx.getDeviceId() ?? undefined;
+  const crossSigning = useCrossSigningActive();
+  const status = useDeviceVerificationStatus(crypto, mx.getSafeUserId(), deviceId);
+  const backupInfo = useKeyBackupInfo(crypto);
+  const backupActive = useBackupActive(crypto);
+  const { status: serverStatus, syncLost } = useAtomValue(serverStatusAtom);
+  const requestSettings = useSetAtom(settingsRequestAtom);
+  // Not urgent: wait until sync has settled (two SYNCING in a row), so it
+  // never stacks under the "Connecting…" strip at startup.
+  const [settled, setSettled] = useState(false);
+  useSyncState(
+    mx,
+    useCallback((state: SyncState | null, prev?: SyncState | null) => {
+      setSettled(state === SyncState.Syncing && prev === SyncState.Syncing);
+    }, []),
+  );
+
+  const key = `${NUDGE_KEY_PREFIX}${deviceId ?? 'unknown'}`;
+  const [record, setRecord] = useState(() => readRecord(key));
+
+  let deviceVerified: boolean | undefined;
+  if (status === VerificationStatus.Verified) deviceVerified = true;
+  else if (status === VerificationStatus.Unverified) deviceVerified = false;
+  const kind = nudgeFor({
+    crossSigning,
+    deviceVerified,
+    backupOnServer: backupInfo === undefined ? undefined : backupInfo !== null,
+    backupActive,
+  });
+
+  // One strip at a time: outages, maintenance and a lost connection win.
+  const otherStrip = syncLost || !!pickBanner(serverStatus, { syncLost, where: 'client' });
+  if (!settled || !deviceId || !kind || otherStrip || !shouldShowNudge(kind, record, Date.now()))
+    return null;
+
+  const copy = NUDGE_COPY[kind];
+  const dismiss = () => {
+    const next = dismissNudge(kind, record, Date.now());
+    try {
+      localStorage.setItem(key, JSON.stringify(next));
+    } catch {
+      /* dismissed for this session only */
+    }
+    setRecord(next);
+  };
+  return (
+    <StatusStrip
+      banner={{ key: kind, tone: 'Primary', text: copy.text, dismissable: true }}
+      icon={Icons.ShieldUser}
+      action={{ label: copy.action, onClick: () => requestSettings('devices') }}
+      dismissLabel="Not now"
+      onDismiss={dismiss}
+    />
+  );
+}
+
+/**
+ * [Gitea #110, #123] The device-security nudge: verify this device, connect
+ * it to the key backup, or set up key backup. See utils/securityNudge.ts.
+ */
+function SecurityBannerInner() {
+  const mx = useMatrixClient();
+  const crypto = mx.getCrypto();
+  if (!crypto) return null;
+  return <SecurityBannerFor crypto={crypto} />;
+}
+
+// A nudge must never take the app down: any error just hides it.
+export function SecurityBanner() {
+  return (
+    <ErrorBoundary fallback={null}>
+      <SecurityBannerInner />
+    </ErrorBoundary>
+  );
+}

src/app/features/server-status/ServerStatusBanner.tsx

@@ -22,7 +22,7 @@ const readDismissed = (): string[] => {
   }
 };
 
-const bannerIcon = (b: StatusBanner): IconSrc => {
+const bannerIcon = (b: StripContent): IconSrc => {
   if (b.kind === 'maintenance') return Icons.Setting;
   if (b.tone === 'Primary') return Icons.Info;
   return Icons.Warning;
@@ -32,12 +32,28 @@ const bannerIcon = (b: StatusBanner): IconSrc => {
  * [Gitea #124] One status strip, in the same slot and style as the sync and
  * clock banners. Presentational: the caller picks the banner.
  */
+export type StripContent = Pick<
+  StatusBanner,
+  'key' | 'tone' | 'text' | 'detail' | 'dismissable'
+> & {
+  kind?: StatusBanner['kind'];
+};
+
 export function StatusStrip({
   banner,
   onDismiss,
+  icon,
+  action,
+  dismissLabel,
 }: {
-  banner: StatusBanner;
+  banner: StripContent;
   onDismiss?: () => void;
+  /** Overrides the icon picked from the banner's tone/kind. */
+  icon?: IconSrc;
+  /** A primary action button (e.g. "Verify"). */
+  action?: { label: string; onClick: () => void };
+  /** A text button instead of the ✕ for dismissing (e.g. "Not now"). */
+  dismissLabel?: string;
 }) {
   const [open, setOpen] = useState(false);
   const mobile = useScreenSizeContext() === ScreenSize.Mobile;
@@ -59,8 +75,8 @@ export function StatusStrip({
           gap="200"
           style={{ minHeight: config.size.X300 }}
         >
-          <Icon size="100" src={bannerIcon(banner)} />
+          <Icon size="100" src={icon ?? bannerIcon(banner)} />
-          <Text size="L400" truncate={mobile && !open} style={{ minWidth: 0 }}>
+          <Text size="L400" truncate={mobile && !!banner.detail && !open} style={{ minWidth: 0 }}>
             {banner.text}
           </Text>
           {banner.detail && (
@@ -78,7 +94,31 @@ export function StatusStrip({
               </Text>
             </Button>
           )}
-          {banner.dismissable && onDismiss && (
+          {action && (
+            <Button
+              size="300"
+              variant={banner.tone}
+              fill="Solid"
+              radii="300"
+              onClick={action.onClick}
+              style={{ flexShrink: 0 }}
+            >
+              <Text size="B300">{action.label}</Text>
+            </Button>
+          )}
+          {banner.dismissable && onDismiss && dismissLabel && (
+            <Button
+              size="300"
+              variant={banner.tone}
+              fill="None"
+              radii="300"
+              onClick={onDismiss}
+              style={{ flexShrink: 0 }}
+            >
+              <Text size="B300">{dismissLabel}</Text>
+            </Button>
+          )}
+          {banner.dismissable && onDismiss && !dismissLabel && (
             <IconButton
               size="300"
               variant={banner.tone}

src/app/hooks/usePresenceUpdater.ts

@@ -167,13 +167,17 @@ export function usePresenceUpdater() {
       // it isn't usable here. fetch(..., { keepalive: true }) lets the request outlive the
       // page and is the correct mechanism for an authed endpoint. (keepalive bodies are
       // capped at 64KB, which this tiny payload is well under.)
+      // [Gitea #339] Synapse treats a missing status_msg as "clear it", so a bare
+      // { presence: 'offline' } wiped the user's custom status for everyone whenever
+      // any tab closed or reloaded. Send the current status along with it.
+      const status = readStatus();
       fetch(`${baseUrl}/_matrix/client/v3/presence/${encodeURIComponent(userId)}/status`, {
         method: 'PUT',
         headers: {
           Authorization: `Bearer ${token}`,
           'Content-Type': 'application/json',
         },
-        body: JSON.stringify({ presence: 'offline' }),
+        body: JSON.stringify({ presence: 'offline', ...(status ? { status_msg: status } : {}) }),
         keepalive: true,
       }).catch((err) => warnPresenceFailure('offline (pagehide)', err));
     };

src/app/hooks/useVoiceChannelFull.ts

@@ -5,6 +5,7 @@ import { StateEvent } from '../../types/matrix/room';
 import { VoiceLimitContent } from '../features/common-settings/general/RoomVoiceLimit';
 import { useCallMembers, useCallSession } from './useCall';
 import { useMatrixClient } from './useMatrixClient';
+import { voiceChannelOccupancy } from '../utils/voiceChannelFull';
 
 export type VoiceChannelFull = {
   channelFull: boolean;
@@ -26,9 +27,11 @@ export const useVoiceChannelFull = (room: Room): VoiceChannelFull => {
 
   return useMemo(() => {
     const maxUsers = limitEvent?.getContent<VoiceLimitContent>().max_users ?? 0;
-    // A user already counted in the session is rejoining and should not be blocked.
+    // Distinct people, not per-device memberships (Gitea #342).
-    const alreadyMember = callMembers.some((m) => m.sender === mx.getSafeUserId());
+    return voiceChannelOccupancy(
-    const channelFull = maxUsers > 0 && !alreadyMember && callMembers.length >= maxUsers;
+      callMembers.map((m) => m.sender),
-    return { channelFull, current: callMembers.length, max: maxUsers };
+      mx.getSafeUserId(),
+      maxUsers,
+    );
   }, [limitEvent, callMembers, mx]);
 };

src/app/pages/client/ClientNonUIFeatures.tsx

@@ -783,15 +783,20 @@ function ReminderMonitor() {
   const { reminders, removeReminder } = useReminders();
   const setToast = useSetAtom(toastQueueAtom);
   const mDirects = useAtomValue(mDirectAtom);
+  const [showNotifications] = useSetting(settingsAtom, 'showNotifications');
+  const quietActive = useNotificationsQuiet();
   const firedRef = useRef<Set<string>>(new Set());
   const removingRef = useRef<Set<string>>(new Set());
-  // Read the latest reminders / DM map via refs so the poll interval below is
+  // Read the latest reminders / DM map / notification prefs via refs so the poll
-  // created once — not torn down and restarted (which resets its 30s countdown
+  // interval below is created once — not torn down and restarted (which resets
-  // and can indefinitely defer a near-due reminder) on every reminder sync (N115).
+  // its 30s countdown and can indefinitely defer a near-due reminder) on every
+  // reminder sync (N115).
   const remindersRef = useRef(reminders);
   remindersRef.current = reminders;
   const mDirectsRef = useRef(mDirects);
   mDirectsRef.current = mDirects;
+  const osNotifyRef = useRef(false);
+  osNotifyRef.current = showNotifications && !quietActive;
 
   useEffect(() => {
     const check = () => {
@@ -815,6 +820,23 @@ function ReminderMonitor() {
           const hashPath = mDirectsRef.current.has(r.roomId)
             ? getDirectRoomPath(r.roomId, r.eventId)
             : getHomeRoomPath(r.roomId, r.eventId);
+          // [Gitea #338] A reminder is only done once the user has SEEN it: the
+          // toast stays until clicked or dismissed (it used to vanish after 4 s
+          // and the reminder was deleted at once, so one due while the user was
+          // away was lost). The removal is persisted on that click/dismiss; an
+          // unseen reminder comes back on the next start.
+          const done = () => {
+            if (removingRef.current.has(key)) return;
+            removingRef.current.add(key);
+            removeReminder(r.eventId, r.timestamp).catch(() => {
+              removingRef.current.delete(key);
+            });
+          };
+          const open = () => {
+            done();
+            // window.location.hash setter auto-prepends '#' (as the toast does)
+            window.location.hash = hashPath;
+          };
           setToast({
             id: `reminder-${key}`,
             displayName: 'Reminder',
@@ -822,16 +844,30 @@ function ReminderMonitor() {
             roomName,
             roomId: r.roomId,
             hashPath,
+            sticky: true,
+            onClick: open,
+            onDismiss: done,
           });
-        }
+          // Away from the window: also raise an OS notification (the reminder is
-        // Persist the removal, retrying on a later tick if it fails — without
+          // an explicit request, but quiet hours / notifications-off win). Never
-        // re-showing the toast (N114). The server echo drops it from
+          // put decrypted E2EE text in it (N106).
-        // `reminders` once the write lands.
+          if (osNotifyRef.current && notificationPermission('granted') && !document.hasFocus()) {
-        if (!removingRef.current.has(key)) {
+            const encrypted = !!room?.hasEncryptionStateEvent();
-          removingRef.current.add(key);
+            showOsNotification(
-          removeReminder(r.eventId, r.timestamp).catch(() => {
+              'Reminder',
-            removingRef.current.delete(key);
+              {
-          });
+                icon: LogoSVG,
+                badge: LogoSVG,
+                body: encrypted ? `A message in ${roomName}` : body,
+                tag: `reminder-${key}`,
+                data: { path: hashPath, roomId: r.roomId },
+              },
+              () => {
+                window.focus();
+                open();
+              },
+            ).catch(() => undefined);
+          }
         }
       });
     };

src/app/pages/client/ClientRoot.tsx

@@ -48,6 +48,7 @@ import {
   ServerStatusBanner,
   ServerStatusFeature,
 } from '../../features/server-status/ServerStatusBanner';
+import { SecurityBanner } from '../../features/security-nudge/SecurityBanner';
 import { AuthMetadataProvider } from '../../hooks/useAuthMetadata';
 import { getFallbackSession, removeFallbackSession } from '../../state/sessions';
 import { pushSessionToSW } from '../../../sw-session';
@@ -313,6 +314,8 @@ export function ClientRoot({ children }: ClientRootProps) {
           <ClientRootLoading />
         ) : (
           <MatrixClientProvider value={mx}>
+            {/* [Gitea #110/#123] Needs the client context (its hooks read it). */}
+            {!syncError && <SecurityBanner />}
             <ServerConfigsLoader>
               {(serverConfigs) => (
                 <CapabilitiesProvider value={serverConfigs.capabilities ?? {}}>

src/app/state/plaintextCaches.ts

@@ -8,6 +8,7 @@ import { clearNavToActivePathStore } from './navToActivePath';
 import { DRAFT_MSG_KEY_PREFIX } from '../utils/draft';
 import { clearCallSession } from '../utils/callRejoin';
 import { clearOutbox } from '../utils/outbox';
+import { NUDGE_KEY_PREFIX } from '../utils/securityNudge';
 
 /**
  * [Gitea #41] Wipe every persisted composer draft (`draft-msg-<roomId>`). Drafts
@@ -77,7 +78,11 @@ const clearStatusMessage = (): void => {
     return;
   }
   keys.forEach((key) => {
-    if (key.startsWith('lotus-status-msg-') || key.startsWith('lotus-status-expiry-')) {
+    if (
+      key.startsWith('lotus-status-msg-') ||
+      key.startsWith('lotus-status-expiry-') ||
+      key.startsWith(NUDGE_KEY_PREFIX)
+    ) {
       try {
         localStorage.removeItem(key);
       } catch {

src/app/utils/geoShare.test.ts

@@ -0,0 +1,30 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { buildGeoUri, formatAccuracy } from './geoShare';
+import { parseGeoUri } from './common';
+
+test('buildGeoUri: exact share keeps 6 decimals and adds the accuracy as u=', () => {
+  assert.equal(buildGeoUri(40.748817, -73.985428, 12.4), 'geo:40.748817,-73.985428;u=12');
+  assert.equal(buildGeoUri(40.748817, -73.985428), 'geo:40.748817,-73.985428');
+  assert.equal(buildGeoUri(40.748817, -73.985428, Number.NaN), 'geo:40.748817,-73.985428');
+});
+
+test('buildGeoUri: approximate share rounds to ~1 km and never claims better than 1 km', () => {
+  assert.equal(buildGeoUri(40.748817, -73.985428, 12, true), 'geo:40.75,-73.99;u=1000');
+  assert.equal(buildGeoUri(40.748817, -73.985428, 3500, true), 'geo:40.75,-73.99;u=3500');
+});
+
+test('buildGeoUri output still parses with the renderer', () => {
+  const loc = parseGeoUri(buildGeoUri(51.5, -0.12, 30));
+  assert.ok(loc);
+  assert.equal(parseFloat(loc.latitude), 51.5);
+  assert.equal(parseFloat(loc.longitude), -0.12);
+});
+
+test('formatAccuracy', () => {
+  assert.equal(formatAccuracy(12.4), '±12 m');
+  assert.equal(formatAccuracy(3500), '±3.5 km');
+  assert.equal(formatAccuracy(25000), '±25 km');
+  assert.equal(formatAccuracy(undefined), undefined);
+  assert.equal(formatAccuracy(0), undefined);
+});

src/app/utils/geoShare.ts

@@ -0,0 +1,39 @@
+/**
+ * [Gitea #340] Helpers for the "Share location" confirm step: the geo URI to
+ * send (RFC 5870, with the fix's accuracy as `u=` so receivers can draw a
+ * radius) and a human accuracy label, so a ±3 km Wi-Fi/IP fix isn't presented
+ * — or sent — as if it were exact.
+ */
+
+/** Decimals kept for an "approximate" share: 2 → ~1.1 km of latitude. */
+export const APPROXIMATE_DECIMALS = 2;
+/** Uncertainty reported for an approximate share (half a 0.01° cell, rounded up). */
+export const APPROXIMATE_UNCERTAINTY_M = 1000;
+
+const validAccuracy = (accuracy?: number): number | undefined =>
+  typeof accuracy === 'number' && Number.isFinite(accuracy) && accuracy > 0
+    ? Math.round(accuracy)
+    : undefined;
+
+export const buildGeoUri = (
+  latitude: number,
+  longitude: number,
+  accuracy?: number,
+  approximate = false,
+): string => {
+  const decimals = approximate ? APPROXIMATE_DECIMALS : 6;
+  const u = approximate
+    ? Math.max(APPROXIMATE_UNCERTAINTY_M, validAccuracy(accuracy) ?? 0)
+    : validAccuracy(accuracy);
+  const base = `geo:${latitude.toFixed(decimals)},${longitude.toFixed(decimals)}`;
+  return u ? `${base};u=${u}` : base;
+};
+
+/** "±12 m", "±3.5 km", or undefined when the browser gave no accuracy. */
+export const formatAccuracy = (accuracy?: number): string | undefined => {
+  const m = validAccuracy(accuracy);
+  if (m === undefined) return undefined;
+  if (m < 1000) return `±${m} m`;
+  const km = m / 1000;
+  return `±${km < 10 ? km.toFixed(1) : Math.round(km)} km`;
+};

src/app/utils/gifPreviewSize.test.ts

@@ -0,0 +1,36 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { gifPreviewBox } from './gifPreviewSize';
+
+test('gifPreviewBox: a landscape GIF wider than the card fills its width', () => {
+  assert.deepEqual(gifPreviewBox(480, 270), { width: 400, height: 225 });
+  assert.deepEqual(gifPreviewBox(480, 200), { width: 400, height: 167 });
+});
+
+test('gifPreviewBox: square and portrait GIFs keep their shape instead of being cropped', () => {
+  assert.deepEqual(gifPreviewBox(300, 300), { width: 320, height: 320 });
+  assert.deepEqual(gifPreviewBox(480, 480), { width: 320, height: 320 });
+  assert.deepEqual(gifPreviewBox(240, 480), { width: 160, height: 320 });
+});
+
+test('gifPreviewBox: a small GIF is enlarged at most 2×', () => {
+  assert.deepEqual(gifPreviewBox(100, 80), { width: 200, height: 160 });
+  assert.deepEqual(gifPreviewBox(150, 150), { width: 300, height: 300 });
+});
+
+test('gifPreviewBox: extreme aspect ratios stay inside the box and never collapse to 0', () => {
+  assert.deepEqual(gifPreviewBox(2000, 50), { width: 400, height: 10 });
+  assert.deepEqual(gifPreviewBox(1, 10000), { width: 1, height: 320 });
+});
+
+test('gifPreviewBox: accepts numeric strings and rejects unknown sizes', () => {
+  assert.deepEqual(gifPreviewBox('480', '270'), { width: 400, height: 225 });
+  assert.equal(gifPreviewBox(undefined, 270), undefined);
+  assert.equal(gifPreviewBox(480, 0), undefined);
+  assert.equal(gifPreviewBox('wide', 270), undefined);
+  assert.equal(gifPreviewBox(Number.NaN, 270), undefined);
+});
+
+test('gifPreviewBox: custom limits', () => {
+  assert.deepEqual(gifPreviewBox(480, 270, 200, 200, 1), { width: 200, height: 113 });
+});

src/app/utils/gifPreviewSize.ts

@@ -0,0 +1,39 @@
+/**
+ * Display size for a Giphy / Tenor link-preview GIF. The card used to force
+ * every GIF into a full-width × 200px band with `object-fit: cover`, so square
+ * and portrait GIFs lost most of their height and small ones were blown up.
+ * Fit the GIF inside `maxWidth × maxHeight` keeping its aspect ratio, and
+ * enlarge a small GIF at most `maxUpscale`× so it stays sharp.
+ */
+
+/** The GIF card's width (UrlPreview is 25rem); a phone shrinks it further via CSS. */
+export const GIF_PREVIEW_MAX_WIDTH = 400;
+export const GIF_PREVIEW_MAX_HEIGHT = 320;
+export const GIF_PREVIEW_MAX_UPSCALE = 2;
+
+export type GifPreviewBox = { width: number; height: number };
+
+// og:image:width / og:image:height are numbers from Synapse, but some sites
+// publish them as strings; anything else (missing, 0, NaN) means "unknown".
+const dimension = (value: unknown): number | undefined => {
+  const n = typeof value === 'string' ? Number(value) : value;
+  return typeof n === 'number' && Number.isFinite(n) && n > 0 ? n : undefined;
+};
+
+/** The box to render the GIF in, or `undefined` when its size isn't known. */
+export const gifPreviewBox = (
+  rawWidth: unknown,
+  rawHeight: unknown,
+  maxWidth = GIF_PREVIEW_MAX_WIDTH,
+  maxHeight = GIF_PREVIEW_MAX_HEIGHT,
+  maxUpscale = GIF_PREVIEW_MAX_UPSCALE,
+): GifPreviewBox | undefined => {
+  const width = dimension(rawWidth);
+  const height = dimension(rawHeight);
+  if (!width || !height) return undefined;
+  const scale = Math.min(maxWidth / width, maxHeight / height, maxUpscale);
+  return {
+    width: Math.max(1, Math.round(width * scale)),
+    height: Math.max(1, Math.round(height * scale)),
+  };
+};

src/app/utils/securityNudge.test.ts

@@ -0,0 +1,81 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import {
+  dismissNudge,
+  NUDGE_GRACE_MS,
+  NUDGE_SNOOZE_MS,
+  nudgeFor,
+  parseNudgeRecord,
+  SecurityState,
+  shouldShowNudge,
+} from './securityNudge';
+
+const healthy: SecurityState = {
+  crossSigning: true,
+  deviceVerified: true,
+  backupOnServer: true,
+  backupActive: true,
+};
+
+test('the #123 table: which nudge for which state', () => {
+  // E: healthy → nothing, ever.
+  assert.equal(nudgeFor(healthy), undefined);
+  // B: cross-signing, this device unverified, backup on server → verify first.
+  assert.equal(nudgeFor({ ...healthy, deviceVerified: false }), 'verify-device');
+  // C: cross-signing, unverified, no backup → still verify first.
+  assert.equal(
+    nudgeFor({ ...healthy, deviceVerified: false, backupOnServer: false }),
+    'verify-device',
+  );
+  // D: verified, no backup → #110's set-up nudge.
+  assert.equal(nudgeFor({ ...healthy, backupOnServer: false }), 'setup-backup');
+  // #110 state 2: backup exists, this device not using it.
+  assert.equal(nudgeFor({ ...healthy, backupActive: false }), 'connect-backup');
+  // A: never set up cross-signing, no backup → set up (the flow does both).
+  assert.equal(
+    nudgeFor({
+      crossSigning: false,
+      deviceVerified: false,
+      backupOnServer: false,
+      backupActive: false,
+    }),
+    'setup-backup',
+  );
+});
+
+test('nothing while crypto is still loading (F)', () => {
+  assert.equal(nudgeFor({ ...healthy, deviceVerified: undefined }), undefined);
+  assert.equal(nudgeFor({ ...healthy, backupOnServer: undefined }), undefined);
+  assert.equal(nudgeFor({ ...healthy, backupActive: undefined }), undefined);
+  // Unknown backup connection doesn't hide a known "no backup at all".
+  assert.equal(
+    nudgeFor({ ...healthy, backupOnServer: false, backupActive: undefined }),
+    'setup-backup',
+  );
+});
+
+test('timing: 24 h grace, 7-day snooze, stop after 3 dismissals', () => {
+  const t0 = 1_700_000_000_000;
+  let record = parseNudgeRecord(null, t0);
+  assert.equal(shouldShowNudge('verify-device', record, t0), false, 'first launch');
+  assert.equal(shouldShowNudge('verify-device', record, t0 + NUDGE_GRACE_MS - 1), false);
+  let now = t0 + NUDGE_GRACE_MS;
+  assert.equal(shouldShowNudge('verify-device', record, now), true, 'after 24 h');
+  for (let i = 1; i <= 3; i += 1) {
+    record = dismissNudge('verify-device', record, now);
+    assert.equal(shouldShowNudge('verify-device', record, now), false, `snoozed after #${i}`);
+    now += NUDGE_SNOOZE_MS;
+    assert.equal(shouldShowNudge('verify-device', record, now), i < 3, `after 7 days (#${i})`);
+  }
+  // Dismissing one nudge doesn't hide another.
+  assert.equal(shouldShowNudge('setup-backup', record, now), true);
+});
+
+test('stored record: round trip, and garbage starts a fresh grace period', () => {
+  const t0 = 1_700_000_000_000;
+  const r = dismissNudge('setup-backup', parseNudgeRecord(null, t0 - 5), t0);
+  assert.deepEqual(parseNudgeRecord(JSON.stringify(r), t0 + 1), r);
+  for (const bad of ['{', 'null', '"x"', '{"firstSeen":"yesterday"}', '{"firstSeen":1}']) {
+    assert.deepEqual(parseNudgeRecord(bad, t0), { firstSeen: t0, dismissals: {} }, bad);
+  }
+});

src/app/utils/securityNudge.ts

@@ -0,0 +1,94 @@
+/**
+ * [Gitea #110, #123] One "security" nudge for this device, in priority order:
+ *
+ * - verify-device: the account has cross-signing but THIS device isn't signed.
+ *   It can't unlock backed-up history and shows as untrusted to others.
+ *   Verifying with the recovery key also connects the backup, so it comes first.
+ * - connect-backup: a key backup exists on the server but this device isn't
+ *   backing up to it (`getActiveSessionBackupVersion()` null).
+ * - setup-backup: no key backup at all (includes accounts that never set up
+ *   cross-signing: the setup flow does both).
+ *
+ * Anything not yet known (crypto still loading) → no nudge. Timing: not in
+ * the first 24 h on a device (onboarding), "Not now" snoozes 7 days, three
+ * dismissals of a nudge stop it for good; a healthy device never sees one.
+ */
+
+export type NudgeKind = 'verify-device' | 'connect-backup' | 'setup-backup';
+
+export type SecurityState = {
+  /** m.cross_signing.master account data present. */
+  crossSigning: boolean;
+  /** This device cross-signing-verified; undefined while crypto isn't ready. */
+  deviceVerified: boolean | undefined;
+  /** A key backup version on the server; undefined while loading. */
+  backupOnServer: boolean | undefined;
+  /** This device is backing up to it; undefined while loading. */
+  backupActive: boolean | undefined;
+};
+
+export const nudgeFor = (s: SecurityState): NudgeKind | undefined => {
+  if (s.crossSigning) {
+    if (s.deviceVerified === undefined) return undefined;
+    if (!s.deviceVerified) return 'verify-device';
+  }
+  if (s.backupOnServer === undefined) return undefined;
+  if (!s.backupOnServer) return 'setup-backup';
+  if (s.backupActive === undefined) return undefined;
+  return s.backupActive ? undefined : 'connect-backup';
+};
+
+export const NUDGE_GRACE_MS = 24 * 60 * 60 * 1000;
+export const NUDGE_SNOOZE_MS = 7 * 24 * 60 * 60 * 1000;
+export const NUDGE_MAX_DISMISSALS = 3;
+
+export type NudgeRecord = {
+  /** When this device was first seen by the nudge (ms). */
+  firstSeen: number;
+  dismissals: Partial<Record<NudgeKind, { count: number; last: number }>>;
+};
+
+export const shouldShowNudge = (kind: NudgeKind, record: NudgeRecord, now: number): boolean => {
+  if (now - record.firstSeen < NUDGE_GRACE_MS) return false;
+  const d = record.dismissals[kind];
+  if (!d) return true;
+  return d.count < NUDGE_MAX_DISMISSALS && now - d.last >= NUDGE_SNOOZE_MS;
+};
+
+export const dismissNudge = (kind: NudgeKind, record: NudgeRecord, now: number): NudgeRecord => ({
+  ...record,
+  dismissals: {
+    ...record.dismissals,
+    [kind]: { count: (record.dismissals[kind]?.count ?? 0) + 1, last: now },
+  },
+});
+
+export const NUDGE_KEY_PREFIX = 'lotus-security-nudge-';
+
+/** Parse a stored record; anything unexpected starts a fresh one (grace period from now). */
+export const parseNudgeRecord = (raw: string | null, now: number): NudgeRecord => {
+  try {
+    const v = JSON.parse(raw ?? '');
+    if (v && typeof v.firstSeen === 'number' && v.dismissals && typeof v.dismissals === 'object') {
+      return { firstSeen: v.firstSeen, dismissals: v.dismissals };
+    }
+  } catch {
+    /* fresh record below */
+  }
+  return { firstSeen: now, dismissals: {} };
+};
+
+export const NUDGE_COPY: Record<NudgeKind, { text: string; action: string }> = {
+  'verify-device': {
+    text: 'Verify this device so you can read your older encrypted messages and others see it as trusted.',
+    action: 'Verify',
+  },
+  'connect-backup': {
+    text: "This device isn't using your key backup yet. Connect it so your encrypted messages stay readable if you lose it.",
+    action: 'Connect',
+  },
+  'setup-backup': {
+    text: "Your encryption keys aren't backed up. Set up key backup so you don't lose your encrypted messages if you log out or lose this device.",
+    action: 'Set up',
+  },
+};

src/app/utils/voiceChannelFull.test.ts

@@ -0,0 +1,28 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { voiceChannelOccupancy } from './voiceChannelFull';
+
+test('voiceChannelOccupancy: one user on two devices fills one slot, not two', () => {
+  assert.deepEqual(voiceChannelOccupancy(['@a:x', '@a:x'], '@b:x', 2), {
+    channelFull: false,
+    current: 1,
+    max: 2,
+  });
+});
+
+test('voiceChannelOccupancy: full when distinct users reach the limit', () => {
+  assert.deepEqual(voiceChannelOccupancy(['@a:x', '@c:x', '@a:x'], '@b:x', 2), {
+    channelFull: true,
+    current: 2,
+    max: 2,
+  });
+});
+
+test('voiceChannelOccupancy: someone already in the call can always join another device', () => {
+  assert.equal(voiceChannelOccupancy(['@a:x', '@b:x'], '@b:x', 2).channelFull, false);
+});
+
+test('voiceChannelOccupancy: no limit (0) is never full; unknown senders are ignored', () => {
+  assert.equal(voiceChannelOccupancy(['@a:x', '@c:x'], '@b:x', 0).channelFull, false);
+  assert.equal(voiceChannelOccupancy([undefined, '@a:x'], '@b:x', 2).current, 1);
+});

src/app/utils/voiceChannelFull.ts

@@ -0,0 +1,25 @@
+/**
+ * [Gitea #342] Whether a voice channel with an `io.lotus.voice_limit` is full.
+ * Counts distinct PEOPLE, not call memberships: a MatrixRTC membership is per
+ * device, so one user on desktop + phone (or with a crashed tab's membership
+ * not yet expired) used to fill two slots. This matches the server-side guard
+ * (matrix `voice-limit-guard.py`, which reduces LiveKit identities to users).
+ */
+export type VoiceChannelOccupancy = {
+  channelFull: boolean;
+  /** Distinct users in the call. */
+  current: number;
+  max: number;
+};
+
+export const voiceChannelOccupancy = (
+  memberSenders: Array<string | undefined>,
+  myUserId: string,
+  maxUsers: number,
+): VoiceChannelOccupancy => {
+  const users = new Set(memberSenders.filter((s): s is string => !!s));
+  // A user already in the call (another device, or rejoining) is never blocked.
+  const alreadyMember = users.has(myUserId);
+  const channelFull = maxUsers > 0 && !alreadyMember && users.size >= maxUsers;
+  return { channelFull, current: users.size, max: maxUsers };
+};