chore(release): renumber group calls as v6.7.0

Group calls are a new capability, and 6.6.6 only landed as a patch because the
version was bumped once per deploy while the feature was being tested. The
number is the release's, not the deploy's.

No code changes: version, badge, changelog heading, docs and build stamp.

Claude-Session: https://claude.ai/code/session_01XSxAkET3hQTkYDQfbjCQwZ

he/index.html

@@ -30,7 +30,7 @@
 
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 <link rel="manifest" href="/he/manifest.json">
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+<link rel="icon" type="image/x-icon" href="/logo/favicon.ico?v=1788239352576">
 
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@@ -96,7 +96,7 @@
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-<link rel="apple-touch-icon" href="/logo/icon-180x180.png?v=1788237895492">
+<link rel="apple-touch-icon" href="/logo/icon-180x180.png?v=1788239352576">
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 <link rel="apple-touch-icon" sizes="60x60" href="/logo/icon-60x60.png">
 <link rel="apple-touch-icon" sizes="72x72" href="/logo/icon-72x72.png">
@@ -105,7 +105,7 @@
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 <link rel="apple-touch-icon" sizes="144x144" href="/logo/icon-144x144.png">
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-<link rel="apple-touch-icon" sizes="180x180" href="/logo/icon-180x180.png?v=1788237895492">
+<link rel="apple-touch-icon" sizes="180x180" href="/logo/icon-180x180.png?v=1788239352576">
 
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 <meta name="msapplication-TileColor" content="#ff6b35">
@@ -222,7 +222,7 @@
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          app modules below, but the parser / first paint is no longer blocked. -->
-    <script defer src="/config/ice-servers.js?v=1788237895492"></script>
+    <script defer src="/config/ice-servers.js?v=1788239352576"></script>
     <script defer src="/libs/react/react.production.min.js"></script>
     <script defer src="/libs/react-dom/react-dom.production.min.js"></script>
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@@ -230,8 +230,8 @@
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     <script defer src="/libs/prism/prism.js"></script>
     <!-- Critical, paint-defining CSS stays render-blocking (avoids FOUC / layout shift). -->
-    <link rel="stylesheet" href="/assets/tailwind.css?v=1788237895492">
-    <link rel="icon" type="image/x-icon" href="/logo/favicon.ico?v=1788237895492">
+    <link rel="stylesheet" href="/assets/tailwind.css?v=1788239352576">
+    <link rel="icon" type="image/x-icon" href="/logo/favicon.ico?v=1788239352576">
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@@ -239,38 +239,38 @@
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     <link rel="preload" href="/assets/fonts/inter/files/inter-latin-700.woff2" as="font" type="font/woff2" crossorigin>
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-    <link rel="stylesheet" href="/src/styles/animations.css?v=1788237895492">
-    <link rel="stylesheet" href="/src/styles/components.css?v=1788237895492">
+    <link rel="stylesheet" href="/src/styles/main.css?v=1788239352576">
+    <link rel="stylesheet" href="/src/styles/animations.css?v=1788239352576">
+    <link rel="stylesheet" href="/src/styles/components.css?v=1788239352576">
     <!-- Loads after components.css on purpose: press feedback, material weight,
          size-specific tracking and the reduced-motion / -transparency / -contrast
          answers all need to settle arguments with the sheets above on source order. -->
-    <link rel="stylesheet" href="/src/styles/apple-motion.css?v=1788237895492">
+    <link rel="stylesheet" href="/src/styles/apple-motion.css?v=1788239352576">
     <!-- Last of the hand-written sheets: the mirroring rules must win over anything
          above them, and they only ever apply under [dir="rtl"]. -->
-    <link rel="stylesheet" href="/src/styles/rtl.css?v=1788237895492">
+    <link rel="stylesheet" href="/src/styles/rtl.css?v=1788239352576">
     <!-- Non-critical CSS (FontAwesome ~102KB, Prism) loaded async — no longer blocks paint. -->
-    <script defer src="/src/scripts/load-async-css.js?v=1788237895492"></script>
+    <script defer src="/src/scripts/load-async-css.js?v=1788239352576"></script>
     <noscript>
         <link rel="stylesheet" href="/assets/fontawesome/css/all.min.css">
         <link rel="stylesheet" href="/libs/prism/prism.css">
     </noscript>
-    <script defer src="/src/scripts/fa-check.js?v=1788237895492"></script>
+    <script defer src="/src/scripts/fa-check.js?v=1788239352576"></script>
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-    <script type="module" src="/src/components/QRScanner.js?v=1788237895492"></script>
+    <script defer src="/src/utils/updateManager.js?v=1788239352576"></script>
+    <script type="module" src="/src/components/UpdateChecker.jsx?v=1788239352576"></script>
+    <script type="module" src="/dist/qr-local.js?v=1788239352576"></script>
+    <script type="module" src="/src/components/QRScanner.js?v=1788239352576"></script>
 </head>
 <body>
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-    <script type="module" src="/dist/app-boot.js?v=1788237895492"></script>
-    <script type="module" src="/dist/app.js?v=1788237895492"></script>
+    <script type="module" src="/dist/app-boot.js?v=1788239352576"></script>
+    <script type="module" src="/dist/app.js?v=1788239352576"></script>
 
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-<script defer src="/src/scripts/pwa-offline-test.js?v=1788237895492"></script>
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+<script defer src="/src/scripts/pwa-register.js?v=1788239352576"></script>
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+<script src="/src/pwa/pwa-manager.js?v=1788239352576" type="module"></script>
+<script defer src="/src/scripts/pwa-offline-test.js?v=1788239352576"></script>
+<link rel="stylesheet" href="/src/styles/pwa.css?v=1788239352576">
 </body>
 </html>