docs(changelog): move log-viewer entry to 0.23.6 (0.23.5 already released)

The viewer fetched only the last 256 KB (~1600 lines) of opslog.log. During a
busy trace the oldest lines scrolled out of the window while the operator was
still reading them. Raise the tail to 1 MB (~6500 lines); the backend already
allows up to 4 MB.

changelog.json

@@ -1,4 +1,14 @@
 [
+  {
+    "version": "0.23.6",
+    "date": "",
+    "en": [
+      "Log viewer: the window now keeps about four times more history (1 MB instead of 256 KB, ~6500 lines). During a busy trace the oldest lines used to scroll out of the buffer while you were still reading them; the larger window holds them."
+    ],
+    "fr": [
+      "Visionneuse de log : la fenêtre conserve environ quatre fois plus d'historique (1 Mo au lieu de 256 Ko, ~6500 lignes). Lors d'une trace chargée, les plus vieilles lignes défilaient hors du buffer pendant qu'on les lisait encore ; la fenêtre agrandie les garde."
+    ]
+  },
   {
     "version": "0.23.5",
     "date": "",

frontend/src/components/LogViewer.tsx

@@ -21,7 +21,12 @@ import { TailLogFile, GetLogFilePath } from '../../wailsjs/go/main/App';
 //     256 KB blob: with "cluster" or "acom" typed in, the window becomes exactly
 //     the subsystem trace you would have grepped for.
 //   • It polls only while open. A closed dialog costs nothing.
-const TAIL_BYTES = 256 * 1024;
+// 1 MB ≈ 6500 lines. The window is a sliding tail: once new lines push past it
+// the oldest fall out of the fetched text entirely, so a small buffer dropped
+// lines the operator was still reading during a busy trace (CAT/cluster/antenna
+// polling). The backend caps this at 4 MB; 1 MB is a good balance against the
+// per-poll payload while open.
+const TAIL_BYTES = 1024 * 1024;
 const POLL_MS = 1000;
 
 export function LogViewer({ open, onOpenChange }: { open: boolean; onOpenChange: (v: boolean) => void }) {