fix(config-backup): ignore a Docker case's conversation id, list every ignored key, correct the retention and restart docs

src/config-backup.ts

@@ -205,10 +205,12 @@ const sha256 = (data: Buffer | string): string => createHash('sha256').update(da
 const VOLATILE_KEYS: Readonly<Record<string, readonly string[]>> = {
   'custom-model-hosts.json': ['lastDiscoveredAt'],
   // Rewritten by activity, not by anything the user set: a Basic-auth login (at most once a minute
-  // per user), a session started in another case, and every captured prompt.
+  // per user), a session started in another case, every captured prompt, and a Docker case's
+  // conversation id after a /clear.
   'users.json': ['lastLoginAt'],
   'settings.json': ['lastUsedCase'],
   'intents.json': ['recentPrompts', 'updatedAt'],
+  'docker-cases.json': ['lastClaudeSessionId'],
 };
 
 function withoutKeys(value: unknown, drop: ReadonlySet<string>): unknown {

src/web/public/index.html

@@ -3269,7 +3269,7 @@
                   <div class="set-row has-field" data-search="config backup retention keep days age">
                     <div class="set-row-text">
                       <span class="set-row-label">Delete backups older than (days)</span>
-                      <span class="set-row-desc">0 keeps backups until the count above pushes them out.</span>
+                      <span class="set-row-desc">A backup is removed once a newer one has existed this many days. 0 keeps backups until the count above pushes them out.</span>
                     </div>
                     <input type="number" id="appSettingsConfigBackupKeepDays" class="set-input" min="0" max="3650" step="1" placeholder="30">
                   </div>