Add /clear command

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

web/src/components/ChatView.tsx

@@ -459,13 +459,15 @@ const MessageItem = memo(function MessageItem({ m, canEdit, onRewind, highlight
     return (
       <details className="summary-divider" data-mid={m.id} onToggle={(e) => setSummaryOpen((e.currentTarget as HTMLDetailsElement).open)}>
         <summary>
-          {summary.auto
+          {summary.text.startsWith("[Context cleared")
+            ? t("chat.cleared")
+            : summary.auto
             ? t("chat.compactedAuto", { tokens: summary.tokens ? fmtCompact(summary.tokens) : "?" })
             : summary.tokens
               ? t("chat.compactedManual", { tokens: fmtCompact(summary.tokens) })
               : t("chat.compacted")}
         </summary>
-        {summaryOpen && <Markdown text={summary.text} />}
+        {summaryOpen && !summary.text.startsWith("[Context cleared") && <Markdown text={summary.text} />}
       </details>
     );
   }

web/src/components/Composer.tsx

@@ -20,6 +20,7 @@ interface Suggestion {
 
 const BUILTIN: { name: string; key: Key }[] = [
   { name: "compact", key: "command.compact" },
+  { name: "clear", key: "command.clear" },
   { name: "new", key: "command.new" },
 ];
 

web/src/i18n/de.ts

@@ -1144,4 +1144,6 @@ export const de: Messages = {
   "stats.table.agent": "nach Modus",
   "stats.table.user": "nach Benutzer",
   "stats.table.session": "teuerste Chats",
+  "command.clear": "Bisheriges Gespräch vergessen (der Chat bleibt sichtbar)",
+  "chat.cleared": "Kontext geleert – das Modell sieht die Nachrichten darüber nicht mehr",
 };

web/src/i18n/en.ts

@@ -1143,6 +1143,8 @@ export const en = {
   "stats.table.agent": "by agent",
   "stats.table.user": "by user",
   "stats.table.session": "top chats",
+  "command.clear": "Forget the conversation so far (the chat stays visible)",
+  "chat.cleared": "Context cleared – the model no longer sees the messages above",
 };
 
 export type Messages = Record<keyof typeof en, string>;

web/src/whatsnew.ts

@@ -3,6 +3,10 @@
  * under "unreleased"; scripts/release.sh renames the key to the release version.
  */
 export const WHATS_NEW: Record<string, { en: string[]; de: string[] }> = {
+  unreleased: {
+    en: ["/clear: the model forgets the conversation so far, the chat stays visible"],
+    de: ["/clear: das Modell vergisst das bisherige Gespräch, der Chat bleibt sichtbar"],
+  },
   "202611-00029": {
     en: [
       "Statistics: foldable sections, years of history with a year filter, export as XLSX/CSV",