diff --git a/api/index.html b/api/index.html
index 01df7de..6f1a37c 100644
--- a/api/index.html
+++ b/api/index.html
@@ -106,7 +106,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -149,13 +149,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/api/og.sha b/api/og.sha
index fe8789c..63d7424 100644
--- a/api/og.sha
+++ b/api/og.sha
@@ -1 +1 @@
-117e6694f85fc5795148bd09805cb3f3a69ef6cd25aa20698a721405b050dacf
+02cbb467db5b72734f7a16c291a325c7600e54d5c9a270bd7fef59d01f3c6f68
diff --git a/billing/index.html b/billing/index.html
index ed25d8a..51d63a1 100644
--- a/billing/index.html
+++ b/billing/index.html
@@ -106,7 +106,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -149,13 +149,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/billing/og.sha b/billing/og.sha
index 6787f5b..3c2dea6 100644
--- a/billing/og.sha
+++ b/billing/og.sha
@@ -1 +1 @@
-0abf83bfed6898c570db89679b932c97b0ab36ce44d3530517dc335b7a5a9748
+0e20ece60c5ce29baca8d8bab674af671d82e1be872f622fafb614cccc114804
diff --git a/chat.js b/chat.js
index 650e6b7..2ea2913 100644
--- a/chat.js
+++ b/chat.js
@@ -714,10 +714,11 @@
   // rendered, each answer with the entities it cited. Every access is wrapped, because a
   // browser with site data blocked throws on the first read and the chat still has to work.
   var STORE_KEY = "chat";
-  // How big the panel is, kept beside the conversation and for the same lifetime: a size is a
-  // choice about this tab's reading, not a preference to carry to the next visit, and the
-  // conversation it frames goes when the tab goes. Its own key, because it outlives any one
-  // conversation: a visitor who sizes the panel, empties it and asks again keeps the size.
+  // How big the panel is, kept in `localStorage` as `lang` and `theme` are: a size is a choice
+  // about how this visitor reads the chat on this screen, so it holds in every tab and on the
+  // next visit, where the conversation it frames goes when its tab goes. Its own key, because it
+  // is no part of any conversation: a link opened in a new tab finds the panel at the size the
+  // visitor gave it, with nothing else carried over.
   var SIZE_KEY = "chat-size";
   var MIN_W = 320, MIN_H = 260, STEP = 24;
   function stored(){
@@ -725,10 +726,10 @@
     catch (e) { return null; }
   }
   function storedSize(){
-    try { var raw = sessionStorage.getItem(SIZE_KEY); var v = raw ? JSON.parse(raw) : null; return v && v.w && v.h ? v : null; }
+    try { var raw = localStorage.getItem(SIZE_KEY); var v = raw ? JSON.parse(raw) : null; return v && v.w && v.h ? v : null; }
     catch (e) { return null; }
   }
-  function keepSize(w, h){ try { sessionStorage.setItem(SIZE_KEY, JSON.stringify({ w: w, h: h })); } catch (e) {} }
+  function keepSize(w, h){ try { localStorage.setItem(SIZE_KEY, JSON.stringify({ w: w, h: h })); } catch (e) {} }
 
   // Where the visitor was reading, kept with the conversation so the back button returns them
   // to it and not to the end. A place is a turn and a distance into its bubble, not a pixel
@@ -1872,9 +1873,10 @@
   var introPick = null;
   // The question a link carries, waiting: a card the visitor acts on, built from the strings and
   // never from markup, so whatever the link says is shown as text. Send hands it to send() as if
-  // typed, Edit puts it in the input to change, and Discard drops it. Under the notice while the
-  // intro stands, since that is what the visitor reads first; at the end of a conversation the
-  // tab already holds, since the intro is then out of sight above it.
+  // typed, Edit puts it in the input to change, and Discard drops it. It stands right after the
+  // intro's prompt line, where a question the visitor typed would stand, so the hello, the notice
+  // and what the panel offers read in the order they always do and the question is the last thing
+  // in the log; at the end of a conversation the tab already holds, for the same reason.
   function askCard(){
     var s = strings(langNow()).ask, card = el("div", "rbchat-ask"), row = el("div", "rbchat-ask-row");
     card.setAttribute("role", "group"); card.setAttribute("aria-label", s.label);
@@ -1892,9 +1894,10 @@
     askEl = card;
     return card;
   }
+  // Wherever the card stands it is the last thing in the log, so the log's end is where it shows.
   function showAsk(){
-    if (!linkAsk || (askEl && askEl.isConnected)) return;
-    log.appendChild(askCard());
+    if (!linkAsk) return;
+    if (!(askEl && askEl.isConnected)) log.appendChild(askCard());
     log.scrollTop = log.scrollHeight;
   }
 
@@ -1919,11 +1922,11 @@
     hello.appendChild(el("span", "rbchat-h2", lines[1]));
     introEl.appendChild(hello);
     notice = el("p", "rbchat-notice"); introEl.appendChild(notice); writeNotice();
-    if (linkAsk && !messages.length) introEl.appendChild(askCard());
     var groups = el("div", "rbchat-groups"); introEl.appendChild(groups);
     var promptLine = el("p", "rbchat-prompt-line", "› " + s.prompt + " ");
     // The block cursor waits here while the intro plays, and hands over to the command line.
     promptLine.appendChild(el("span", "rbchat-cur")); introEl.appendChild(promptLine);
+    if (linkAsk && !messages.length) introEl.appendChild(askCard());
     log.insertBefore(introEl, log.firstChild);
     if (!play || still()) finishIntro();
     facts(function(f){
@@ -1956,6 +1959,8 @@
         // A restored conversation has moved past the intro: its menus are spent, and the rows a
         // number picks stay those of the menu after the last answer.
         if (messages.length) spendIntro(); else { menuRows = rows.concat(picked).map(function(r){ return r[0]; }); keysLine(); }
+        // The menus are drawn above a waiting question and would push it out of sight.
+        if (askEl && askEl.parentNode === introEl) log.scrollTop = log.scrollHeight;
         if (!introEl.classList.contains("rbchat-still")) playIntro();
       });
     });
@@ -2080,7 +2085,13 @@
       for (var b = 0; b < labels.length; b++) labels[b].textContent = strings(answerLang(turns, langNow())).askNext;
     }
     // A language switch redraws the intro in the new language, finished, where the log holds one.
-    if (introEl && log) { var keep_ = log.scrollTop; introEl.parentNode && introEl.parentNode.removeChild(introEl); introEl = null; intro(false); log.scrollTop = keep_; }
+    // A waiting question is redrawn with it, and the button that held the focus holds it again:
+    // a page sets its language after the panel has opened, and Enter still has to send.
+    if (introEl && log) {
+      var keep_ = log.scrollTop, held = askEl && askEl.contains(document.activeElement) ? Array.prototype.indexOf.call(askEl.querySelectorAll("button"), document.activeElement) : -1;
+      introEl.parentNode && introEl.parentNode.removeChild(introEl); introEl = null; intro(false); log.scrollTop = keep_;
+      if (held >= 0 && askEl) askEl.querySelectorAll("button")[held].focus({ preventScroll: true });
+    }
     // The chips standing under an answer are drawn again from the titles they were picked as, so a
     // model question reads in the new language and a number key sends what its row now shows.
     if (qBox && qPicked && qPicked.length) { var was_ = qPicked.slice(); hideQuestions(); offer(was_); }
@@ -2111,7 +2122,7 @@
     // something to clear: an empty panel shows no control for emptying it. A conversation has no
     // length at which it must start over, so this is the only door; its reset takes the turns,
     // the log and the tab's copy together; the panel's size stays, being a choice
-    // about this tab's reading rather than part of the conversation.
+    // about how the visitor reads rather than part of the conversation.
     newBtn = el("button", "rbchat-new"); newBtn.type = "button"; newBtn.hidden = true;
     // The glyph is an arrow come back round, not a plus: a plus beside the cross read as "add",
     // and what the button does is start over. The note under it names the action for a pointer
@@ -2206,7 +2217,7 @@
     // Double-click gives the stylesheet's size back and forgets the stored one, as the stage's
     // gutter does: otherwise the only way back is to drag until it looks right again.
     grip.addEventListener("dblclick", function(){
-      try { sessionStorage.removeItem(SIZE_KEY); } catch (e) {}
+      try { localStorage.removeItem(SIZE_KEY); } catch (e) {}
       unsize();
     });
     grip.addEventListener("keydown", function(ev){
diff --git a/index.html b/index.html
index 5b020b7..c2e837a 100644
--- a/index.html
+++ b/index.html
@@ -108,7 +108,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -151,13 +151,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/model.json b/model.json
index 645f2c2..eb69839 100644
--- a/model.json
+++ b/model.json
@@ -1,5 +1,5 @@
 {
-  "commit": "57707b03bc351f0b5a038ba1167f56b6f8478379",
+  "commit": "d2efc960525abb769ca51041ad29d32bf51c0bc3",
   "core": "0.69.0",
   "root": "GuestGraph",
   "rootId": "01a0d2e2-f788-788d-ac26-56e9ef94fdd2",
@@ -13817,8 +13817,9 @@
       "fields": {
         "id": "01a108de-7c37-7b65-a051-0ca54a5997b0",
         "source": "Local",
-        "mechanism": "session-storage",
+        "mechanism": "local-storage",
         "necessity": "optional",
+        "duration": "Until the visitor clears it",
         "surfaces": [
           "chat.guestgraph.io chat"
         ]
diff --git a/model/index.html b/model/index.html
index c0af140..3c568ec 100644
--- a/model/index.html
+++ b/model/index.html
@@ -106,7 +106,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -149,13 +149,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/model/og.sha b/model/og.sha
index 02bc4fd..db9837a 100644
--- a/model/og.sha
+++ b/model/og.sha
@@ -1 +1 @@
-50510204bf2876ed03ba933106ee38c87bbeeb798065f993a8b728b6ea85a650
+42a1b3d74a3ae0c49bef54f027e28ab85acd78c908104e68a2c2f0c2f222bb9f
diff --git a/og.sha b/og.sha
index b76a7f1..d9f73a1 100644
--- a/og.sha
+++ b/og.sha
@@ -1 +1 @@
-2dddb6a90e5bf59305e5807bb30c6c356d596d6c999929c0ea431b9de17cbba5
+5bcf8837c4e2a0c81533477c7bbd6bf9ce7681e1064b75e1af372aa15f8e97a3
diff --git a/package-lock.json b/package-lock.json
index 4e43fa2..72295b2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
         "companygraph-meta-model": "github:companygraph/meta-model#v0.94.0"
       },
       "devDependencies": {
-        "@robertblust/design": "github:robertblust/design#v0.155.0",
+        "@robertblust/design": "github:robertblust/design#v0.156.0",
         "companygraph-mcp-server": "github:companygraph/mcp-server#v0.69.0",
         "pdf-lib": "^1.17.1",
         "playwright": "^1.63.0",
@@ -96,8 +96,8 @@
       }
     },
     "node_modules/@robertblust/design": {
-      "version": "0.155.0",
-      "resolved": "git+ssh://git@github.com/robertblust/design.git#6f4c29b1e307f3e982537ca2e132f8adb15bd895",
+      "version": "0.156.0",
+      "resolved": "git+ssh://git@github.com/robertblust/design.git#e9ae31386c3af4f16cd1f83faa0df5514ff56f6a",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/package.json b/package.json
index a6e717a..5cf3f7e 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "pin:check": "node pin-check.mjs"
   },
   "devDependencies": {
-    "@robertblust/design": "github:robertblust/design#v0.155.0",
+    "@robertblust/design": "github:robertblust/design#v0.156.0",
     "companygraph-mcp-server": "github:companygraph/mcp-server#v0.69.0",
     "pdf-lib": "^1.17.1",
     "playwright": "^1.63.0",
diff --git a/principles/index.html b/principles/index.html
index 2dc8008..1247f14 100644
--- a/principles/index.html
+++ b/principles/index.html
@@ -106,7 +106,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -149,13 +149,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
@@ -317,7 +318,7 @@ <h3 data-de="Der Kern bleibt offen">The core stays open</h3>
       </article>
     </section>
 
-    <p class="derived" data-de="Erzeugt aus <a href='https://github.com/guestgraph/mental-model'>guestgraph/mental-model</a>@57707b0 – <code class='mono'>model/vision.md</code> und <code class='mono'>model/values/</code>. Dieses Repository ist eine Instanz von <a href='https://companygraph.io/'>CompanyGraph</a>, einem Meta-Modell, das ein Unternehmen als Graph aus Markdown beschreibt.">Generated from <a href="https://github.com/guestgraph/mental-model">guestgraph/mental-model</a>@57707b0 — <code class="mono">model/vision.md</code> and <code class="mono">model/values/</code>. That repository is an instance of <a href="https://companygraph.io/">CompanyGraph</a>, a meta-model for describing a company as a graph of Markdown.</p>
+    <p class="derived" data-de="Erzeugt aus <a href='https://github.com/guestgraph/mental-model'>guestgraph/mental-model</a>@d2efc96 – <code class='mono'>model/vision.md</code> und <code class='mono'>model/values/</code>. Dieses Repository ist eine Instanz von <a href='https://companygraph.io/'>CompanyGraph</a>, einem Meta-Modell, das ein Unternehmen als Graph aus Markdown beschreibt.">Generated from <a href="https://github.com/guestgraph/mental-model">guestgraph/mental-model</a>@d2efc96 — <code class="mono">model/vision.md</code> and <code class="mono">model/values/</code>. That repository is an instance of <a href="https://companygraph.io/">CompanyGraph</a>, a meta-model for describing a company as a graph of Markdown.</p>
     <!-- principles:end -->
   </div>
 </main>
diff --git a/principles/og.sha b/principles/og.sha
index 6382149..6ad7e72 100644
--- a/principles/og.sha
+++ b/principles/og.sha
@@ -1 +1 @@
-534bea22b0571585cbf19f06df9e094760c5011971ceef7d765d57f338d8fe77
+5488e06d1a8ea72a2253c6cc5dfd17da50ea6ac6091c3d03544be3d10a135545
diff --git a/privacy/index.html b/privacy/index.html
index aa9fbf5..6edc3ea 100644
--- a/privacy/index.html
+++ b/privacy/index.html
@@ -106,7 +106,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -149,13 +149,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
@@ -328,11 +329,12 @@ <h2 data-de="Wohin Ihre Daten gehen">Where your data goes</h2>
       <!-- privacy:start -->
       <div class="lineage" id="lineage">
         <svg class="wires" id="wires" aria-hidden="true"></svg>
-        <div class="ln-model" id="lnmodel"><div class="lbl" data-de="Auf guestgraph.io">On guestgraph.io</div><div class="nm" data-de="Ihr Besuch">Your visit</div><div class="at mono">@57707b0</div></div>
+        <div class="ln-model" id="lnmodel"><div class="lbl" data-de="Auf guestgraph.io">On guestgraph.io</div><div class="nm" data-de="Ihr Besuch">Your visit</div><div class="at mono">@d2efc96</div></div>
         <ul class="ln-groups">
           <li class="ln-group hand">
             <div class="ln-maker" data-maker="local-storage"><svg class="mk hand" aria-hidden="true"><use href="#m-hand"/></svg><span class="who"><span data-de="In Ihrem Browser gespeichert">Kept in your browser</span><span class="how" data-de="bis Sie die Daten löschen · nie automatisch übermittelt">until you clear it · never sent on its own</span></span></div>
             <ul class="ln-surfaces">
+              <li><button class="ln-s" type="button" id="key-chat-size" data-id="01a108de-7c37-7b65-a051-0ca54a5997b0" data-maker="local-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat-size</span><span class="host" data-de="Wie gross Sie das Chatfenster eingestellt haben, in Pixeln">How big the visitor made the chat panel, in pixels</span></button></li>
               <li><button class="ln-s" type="button" id="key-lang" data-id="01a108de-2f51-7c49-8857-96a3ade6db33" data-maker="local-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">lang</span><span class="host" data-de="Die Sprache, die Sie gewählt haben, `de` oder `en`, damit sich die nächste Seite in dieser Sprache öffnet">The language the visitor chose, `de` or `en`, so the next page opens in it</span></button></li>
               <li><button class="ln-s" type="button" id="key-stage-card" data-id="01a108de-4d0c-73ca-9439-74a87d8cf815" data-maker="local-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">stage-card</span><span class="host" data-de="Wie breit Sie den Detailbereich auf den Modellseiten eingestellt haben, in Pixeln">How wide the visitor left the details panel on the model pages, in pixels</span></button></li>
               <li><button class="ln-s" type="button" id="key-stage-card-modal" data-id="01a108de-5ca1-70b7-a9be-101b67f9b5b0" data-maker="local-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">stage-card-modal</span><span class="host" data-de="Wie breit Sie den Detailbereich in der vergrösserten Ansicht eingestellt haben, in Pixeln">How wide the visitor left the details panel in the expanded view, in pixels</span></button></li>
@@ -345,7 +347,6 @@ <h2 data-de="Wohin Ihre Daten gehen">Where your data goes</h2>
               <li><button class="ln-s" type="button" id="key-chat" data-id="01a108de-6c48-78e8-92ea-94fd61a3d2a2" data-maker="session-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat</span><span class="host" data-de="Das Gespräch in diesem Tab, damit es nicht verloren geht, wenn Sie einem Link folgen">The conversation in this tab, so following a link does not lose it</span></button></li>
               <li><button class="ln-s" type="button" id="key-chat-facts" data-id="01a108de-9aee-7747-92cb-eb38ab0410e2" data-maker="session-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat-facts</span><span class="host" data-de="Was der Chat aus der Datei des Modells gelesen hat, um Fragen vorzuschlagen. So zeigt die nächste Seite diese Fragen sofort an">What the chat read from the model's file to offer its questions, so the next page draws them at once</span></button></li>
               <li><button class="ln-s" type="button" id="key-chat-pictures" data-id="01a108de-8b7a-7ff6-9af0-9a7b8a38dc8c" data-maker="session-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat-pictures</span><span class="host" data-de="Die Diagramme, die der Chat in diesem Tab in seinen Antworten gezeichnet hat">The figures the chat drew in its answers in this tab</span></button></li>
-              <li><button class="ln-s" type="button" id="key-chat-size" data-id="01a108de-7c37-7b65-a051-0ca54a5997b0" data-maker="session-storage" aria-pressed="false" aria-controls="lnpanel"><span class="nm">chat-size</span><span class="host" data-de="Wie gross Sie das Chatfenster eingestellt haben, in Pixeln">How big the visitor made the chat panel, in pixels</span></button></li>
             </ul>
           </li>
           <li class="ln-group">
diff --git a/privacy/og.sha b/privacy/og.sha
index a52cf29..1b86839 100644
--- a/privacy/og.sha
+++ b/privacy/og.sha
@@ -1 +1 @@
-d37f9f123709e762e412d9619d09f0cbe073f47cfdd011abcaf1c0de78deb28a
+2ea411a14fc97ab48ff05bbb4e573f24f3715d127fe2b1dd9b9c572ea6039653
diff --git a/problems/index.html b/problems/index.html
index 552aea8..8c36d81 100644
--- a/problems/index.html
+++ b/problems/index.html
@@ -106,7 +106,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -149,13 +149,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/problems/og.sha b/problems/og.sha
index dd0610a..ee0873d 100644
--- a/problems/og.sha
+++ b/problems/og.sha
@@ -1 +1 @@
-a4dd9ff385d5031b6afb5447e2692ae7b63074c740892eecea2e3afba1126d07
+1c1fd91883ecb85e5df984abdddec51c6579ea4dfaca9461695cc055f2912c99
diff --git a/processes/index.html b/processes/index.html
index 4c4370e..7eee019 100644
--- a/processes/index.html
+++ b/processes/index.html
@@ -106,7 +106,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -149,13 +149,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/processes/og.sha b/processes/og.sha
index d5b7903..69b8de0 100644
--- a/processes/og.sha
+++ b/processes/og.sha
@@ -1 +1 @@
-99852b9e1785fc22cae2dc8a003c68595a4e6c49940da2f92a009be98fa56d2b
+ec12a703b14f241bda2fd59bc411dc9718d035546647680052cf57628ab8862b
diff --git a/processes/pictures/answering.sha b/processes/pictures/answering.sha
index 0483f1a..013e484 100644
--- a/processes/pictures/answering.sha
+++ b/processes/pictures/answering.sha
@@ -1 +1 @@
-519eca92166807f07e15eb5d5fbbf4582a62459d88881c2fd88312b2423ee209
+0c1587a3775758e5b0626b341b7fa95f965cc537883680b46af27aeff7da2a1a
diff --git a/processes/pictures/contribution.sha b/processes/pictures/contribution.sha
index 6ba5fbb..d8bb125 100644
--- a/processes/pictures/contribution.sha
+++ b/processes/pictures/contribution.sha
@@ -1 +1 @@
-bf765e3a9155be0bdc2f1eaeecc5df9b8f5fa62b26242524d63a31465f9b6237
+5c09839ae96c159be0810064b479c823bff9ea8b731e8e7986c161a5a7891b1d
diff --git a/processes/pictures/deciding.sha b/processes/pictures/deciding.sha
index 62c7a54..3af8ee6 100644
--- a/processes/pictures/deciding.sha
+++ b/processes/pictures/deciding.sha
@@ -1 +1 @@
-50aacf274318c421916d4f9855e85b4753a10779395be0d2cde8c3a9b59b95c6
+1fe5bde23b1983ab9a9da8fdeaceea166a53b91e15dd6ba9a9785fd2271d4ab1
diff --git a/processes/pictures/delivery.sha b/processes/pictures/delivery.sha
index 074134e..86be062 100644
--- a/processes/pictures/delivery.sha
+++ b/processes/pictures/delivery.sha
@@ -1 +1 @@
-04f0a2a1a6649a0758bf64449d8f48c0a5b8c6487dfca869545f7eb05bd57128
+9094e5aa366fc0ef85623580f0122c966b5aaa131caae7d1e02e3a398f5b6d2c
diff --git a/processes/pictures/feature-request.sha b/processes/pictures/feature-request.sha
index 192556f..6fb2a33 100644
--- a/processes/pictures/feature-request.sha
+++ b/processes/pictures/feature-request.sha
@@ -1 +1 @@
-792fbed761d1184af7f3a9c7a20d9549923c828178a83782af7fe57aa12ac21f
+24e9b28db5cc4229bb286eb2a07be4597106a2ca1cf3648358d65809b15dd5bb
diff --git a/processes/pictures/narrating.sha b/processes/pictures/narrating.sha
index faaab0e..8c6b337 100644
--- a/processes/pictures/narrating.sha
+++ b/processes/pictures/narrating.sha
@@ -1 +1 @@
-aa6f4644441335e928efe7c29190f383e4790514218891511e0f72107199a966
+063a10421bae62fecc121b6deaf6d5c3d7b701e2c89c13fd55a9e64315737755
diff --git a/sitemap.xml b/sitemap.xml
index bd5f0c0..14314cd 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -5,15 +5,15 @@
   of their own; they no longer do, so there is no second list to keep in step.
 -->
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
-  <url><loc>https://guestgraph.io/</loc><lastmod>2026-10-08</lastmod></url>
-  <url><loc>https://guestgraph.io/principles/</loc><lastmod>2026-10-13</lastmod></url>
-  <url><loc>https://guestgraph.io/processes/</loc><lastmod>2026-10-13</lastmod></url>
-  <url><loc>https://guestgraph.io/surfaces/</loc><lastmod>2026-10-13</lastmod></url>
-  <url><loc>https://guestgraph.io/api/</loc><lastmod>2026-10-08</lastmod></url>
-  <url><loc>https://guestgraph.io/model/</loc><lastmod>2026-10-13</lastmod></url>
-  <url><loc>https://guestgraph.io/billing/</loc><lastmod>2026-10-08</lastmod></url>
-  <url><loc>https://guestgraph.io/privacy/</loc><lastmod>2026-10-13</lastmod></url>
-  <url><loc>https://guestgraph.io/problems/</loc><lastmod>2026-10-08</lastmod></url>
-  <url><loc>https://guestgraph.io/talks/</loc><lastmod>2026-10-08</lastmod></url>
-  <url><loc>https://guestgraph.io/talks/intro/</loc><lastmod>2026-10-05</lastmod></url>
+  <url><loc>https://guestgraph.io/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/principles/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/processes/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/surfaces/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/api/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/model/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/billing/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/privacy/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/problems/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/talks/</loc><lastmod>2026-10-14</lastmod></url>
+  <url><loc>https://guestgraph.io/talks/intro/</loc><lastmod>2026-10-14</lastmod></url>
 </urlset>
diff --git a/source.json b/source.json
index 224814f..952af1a 100644
--- a/source.json
+++ b/source.json
@@ -1 +1 @@
-{"repo":"guestgraph/mental-model","commit":"57707b03bc351f0b5a038ba1167f56b6f8478379"}
\ No newline at end of file
+{"repo":"guestgraph/mental-model","commit":"d2efc960525abb769ca51041ad29d32bf51c0bc3"}
\ No newline at end of file
diff --git a/surfaces/index.html b/surfaces/index.html
index 6dc8043..6ee009e 100644
--- a/surfaces/index.html
+++ b/surfaces/index.html
@@ -106,7 +106,7 @@
 </script>
 
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -149,13 +149,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
@@ -338,7 +339,7 @@ <h1 data-de="<span class='r70'>Nichts wird neben</span><span class='rcl'>dem <em
       <!-- surfaces:start -->
       <div class="lineage" id="lineage">
         <svg class="wires" id="wires" aria-hidden="true"></svg>
-        <div class="ln-model" id="lnmodel"><div class="lbl" data-de="Das Modell">The model</div><div class="nm">mental-model</div><div class="at mono">@57707b0</div></div>
+        <div class="ln-model" id="lnmodel"><div class="lbl" data-de="Das Modell">The model</div><div class="nm">mental-model</div><div class="at mono">@d2efc96</div></div>
         <ul class="ln-groups">
           <li class="ln-group">
             <div class="ln-maker" data-maker="https://github.com/guestgraph/guestgraph.github.io"><svg class="mk build" aria-hidden="true"><use href="#m-build"/></svg><span class="who">guestgraph.github.io<span class="how" data-de="Build">build</span></span></div>
diff --git a/surfaces/og.sha b/surfaces/og.sha
index fefbc45..7d73ab5 100644
--- a/surfaces/og.sha
+++ b/surfaces/og.sha
@@ -1 +1 @@
-2479e1131d39813d9718fb86c75d75a61021c33f7843fd4922f2afae8a9eee0d
+3c5ad94ad402d5c2b49b9852a072e3c428ea26de34330e314c9d0cb181a32d9b
diff --git a/talks/index.html b/talks/index.html
index bbffc63..6a4c849 100644
--- a/talks/index.html
+++ b/talks/index.html
@@ -112,7 +112,7 @@
 }
 </script>
 <script>
-  /* ─── theme boot · v5 · page ────────────────────────────────────
+  /* ─── theme boot · v6 · page ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -155,13 +155,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/talks/intro/index.html b/talks/intro/index.html
index 7727583..0c664da 100644
--- a/talks/intro/index.html
+++ b/talks/intro/index.html
@@ -120,7 +120,7 @@
 </script>
 <meta name="author" content="Robert Blust">
 <script>
-  /* ─── theme boot · v5 · deck ────────────────────────────────────
+  /* ─── theme boot · v6 · deck ────────────────────────────────────
      Set the theme before anything paints. Generated from @robertblust/design —
      editing it here does nothing, because the next `npm run design` overwrites it.
 
@@ -163,13 +163,14 @@
     try {
       if (window.top !== window && /[?&]embed(&|$)/.test(location.search)) document.documentElement.setAttribute("data-embed", "");
     } catch (e) {}
-    // A conversation the tab keeps open: the keys are chat.js's, `chat` and `chat-size`, read
-    // the way it reads them. Never in a frame, which takes no chat of its own.
+    // A conversation the tab keeps open: the keys are chat.js's, `chat` in the tab's storage and
+    // `chat-size` in the browser's, read the way it reads them. Never in a frame, which takes no
+    // chat of its own.
     try {
       var r = document.documentElement, c = JSON.parse(sessionStorage.getItem("chat") || "null");
       if (c && c.open && window.top === window) {
         r.setAttribute("data-chat-waiting", location.host);
-        var z = JSON.parse(sessionStorage.getItem("chat-size") || "null");
+        var z = JSON.parse(localStorage.getItem("chat-size") || "null");
         if (z && z.w && z.h) { r.style.setProperty("--rbchat-kept-w", z.w + "px"); r.style.setProperty("--rbchat-kept-h", z.h + "px"); }
       }
     } catch (e) {}
diff --git a/talks/intro/og.sha b/talks/intro/og.sha
index 91bce28..955016c 100644
--- a/talks/intro/og.sha
+++ b/talks/intro/og.sha
@@ -1 +1 @@
-2bf124ee4fbe1296577f1ba4c65a6ab04a255cda96b456a46835602011546cae
+21e6c1a84bf6309187f2d1634cde00068cc07b6670c30dfde6599155f72e6fc4
diff --git a/talks/og.sha b/talks/og.sha
index 6afc323..f9c2de8 100644
--- a/talks/og.sha
+++ b/talks/og.sha
@@ -1 +1 @@
-132f35af32f00b97df31c348d8a42401316ef1cae176e323c9e5622311449d3e
+aa81ac2f8491b251f863c601eea065d5a6d1c343eb88b50ea0e557999c345527