fix(pwa): the installed app can rotate, and "New Message" opens a new DM (#292)

manifest.json locked the installed app to portrait (no landscape video,
screenshare or call view on Android / tablets) and its "New Message"
shortcut pointed at /, the home page. Drop the orientation lock and
point the shortcut at ./direct/create/ (Create Chat).

Fixes #292

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

public/manifest.json

@@ -5,7 +5,6 @@
   "dir": "auto",
   "lang": "en-US",
   "display": "standalone",
-  "orientation": "portrait",
   "start_url": "./",
   "background_color": "#0a0a0a",
   "theme_color": "#980000",
@@ -90,7 +89,7 @@
       "name": "New Message",
       "short_name": "DM",
       "description": "Open a new direct message",
-      "url": "/",
+      "url": "./direct/create/",
       "icons": [
         {
           "src": "public/res/android/android-chrome-96x96.png",

src/app/components/CallEmbedProvider.tsx

@@ -89,8 +89,6 @@ import { zIndices } from '../styles/zIndex';
 
 const PIP_MIN_W = 200;
 const PIP_MIN_H = 112;
-/** Default PiP top: just below the 64px-ish room header. */
-const PIP_DEFAULT_TOP = 72;
 
 type Corner = 'se' | 'sw' | 'ne' | 'nw';
 
@@ -1048,11 +1046,8 @@ export function CallEmbedProvider({ children }: CallEmbedProviderProps) {
           el.style.left = `${Math.max(0, Math.min(savedPos.left, window.innerWidth - 280))}px`;
           el.style.top = `${Math.max(0, Math.min(savedPos.top, window.innerHeight - 158))}px`;
         } else {
-          // [Gitea #323] First use: top-right under the room header, over the
-          // timeline. Bottom-right sat on the composer (Send / Emoji, and on
-          // phones the whole message box), so typing landed on the call.
-          el.style.left = `${Math.max(0, window.innerWidth - 280 - 16)}px`;
-          el.style.top = `${PIP_DEFAULT_TOP}px`;
+          el.style.left = `${window.innerWidth - 280 - 16}px`;
+          el.style.top = `${window.innerHeight - 158 - 72}px`;
         }
         el.style.width = '280px';
         el.style.height = '158px';