Show Windows privacy hints in launcher

The launcher sentence around the room name was replaced
by a standalone instruction ("meetingText"); the room name
now sits on its own line below it.

Windows users additionally get camera/microphone
permission instructions in the launcher view. The block
reuses the existing i18n/OS detection and only appears
when translations loaded, so a failed i18n.json fetch
cannot render an empty box.

launch.html

@@ -68,24 +68,47 @@
           <h1 data-i18n="launcher.title">Jitsi Meeting</h1>
 
           <p>
-            <span data-i18n="launcher.meetingPrefix">
-              The meeting
+            <span data-i18n="launcher.meetingText">
+              Please click the button, to join the meeting:
             </span>
             <span class="room">
               <strong id="roomName"></strong>
             </span>
-            <span data-i18n="launcher.meetingSuffix">
-              will be opened.
-            </span>
           </p>
 
           <button id="openButton" class="button primary" type="button" data-i18n="launcher.openButton">
-            Open meeting
+            Join meeting
           </button>
           
           <button id="createNewFromLauncherButton" class="button secondary hidden" type="button" data-i18n="creator.createNewButton">
             Create New Meeting
           </button>
+
+          <!-- KAMERA-/MIKROFON-HINWEISE (WINDOWS) -->
+          <div id="privacyInfo" class="privacy hidden">
+            <h2 data-i18n="meetingPrivacySettings.title"></h2>
+            <p data-i18n="meetingPrivacySettings.intro"></p>
+
+            <h3 data-i18n="meetingPrivacySettings.step1Title"></h3>
+            <p data-i18n="meetingPrivacySettings.step1Description"></p>
+
+            <h3 data-i18n="meetingPrivacySettings.step2Title"></h3>
+            <p data-i18n="meetingPrivacySettings.step2Description"></p>
+
+            <h3 data-i18n="meetingPrivacySettings.step3Title"></h3>
+            <p data-i18n="meetingPrivacySettings.step3Description"></p>
+
+            <p data-i18n="meetingPrivacySettings.browserPermissions"></p>
+
+            <h3 data-i18n="meetingPrivacySettings.goodToKnowTitle"></h3>
+            <ul>
+              <li data-i18n="meetingPrivacySettings.goodToKnow1"></li>
+              <li data-i18n="meetingPrivacySettings.goodToKnow2"></li>
+              <li data-i18n="meetingPrivacySettings.goodToKnow3"></li>
+            </ul>
+
+            <p data-i18n="meetingPrivacySettings.adminSupport"></p>
+          </div>
         </div>
 
         <!-- STARTVORGANG -->