fix: agent update runs as root when it can (sudo without a password otherwise), checks the download, restarts reliably and reports its result; one-colour file icons; zip and delete on one line on phones; PIN buttons alike; no key fingerprint in the SSH status; corner plus clears split panes

internal/server/web/static/account.js

@@ -53,7 +53,7 @@
     '  <input type="password" name="current" inputmode="numeric" maxlength="4" pattern="[0-9]{4}" placeholder="текущий PIN" autocomplete="off">' +
     '  <input type="password" name="pin" inputmode="numeric" maxlength="4" pattern="[0-9]{4}" placeholder="новый PIN, 4 цифры" autocomplete="off">' +
     '  <input type="password" name="again" inputmode="numeric" maxlength="4" pattern="[0-9]{4}" placeholder="новый ещё раз" autocomplete="off">' +
-    '  <div class="row"><button type="button" class="btn danger small acct-pindel">Убрать PIN</button><button type="submit" class="acct-pinsave">Сохранить</button></div>' +
+    '  <div class="row"><button type="button" class="btn danger acct-pindel">Убрать PIN</button><button type="submit" class="acct-pinsave">Сохранить</button></div>' +
     '  </form>' +
     '  <label class="acct-pingrace"><span>На этом устройстве не спрашивать после ввода</span><select>' +
     '  <option value="0">каждый раз</option><option value="5">5 минут</option><option value="15">15 минут</option>' +