diff --git a/README.md b/README.md
index 43c50d4..9a6a518 100644
--- a/README.md
+++ b/README.md
@@ -199,8 +199,10 @@ in the stored wire shape and are skipped with a note in the import report.
 
 ### Files view (per-file tracking)
 
-The Trace tab's side panel has a view selector (*Map* / *Stats* / **Files**;
-a drop-down, since three tab captions no longer fit).  The Files view is a
+The Trace tab has a view selector (*Map* / *Stats* / **Files**) in its topbar,
+right-aligned over the side panel with the panel's width, so it stays visible
+while the panel scrolls (a drop-down, since three tab captions no longer
+fit).  The Files view is a
 trace-wide timeline of file operations — every **Read**, **Update** and
 **Changed on card** row shows the same file name as the Map view, and clicking
 a row jumps straight to the APDU in the trace and leaves it highlighted
diff --git a/README_RUS.md b/README_RUS.md
index a910e38..6dceb56 100644
--- a/README_RUS.md
+++ b/README_RUS.md
@@ -203,8 +203,10 @@ Application Layer* — два отдельных поля выбора, имен
 
 ### Просмотр файлов (сопровождение состояния файлов)
 
-В боковой панели вкладки «Трассировка» появился выбор вида (*Map* / *Stats* /
-**Files** — выпадающий список, три подписи-вкладки уже не помещались).  Вид
+В верхней панели вкладки «Трассировка» появился выбор вида (*Map* / *Stats* /
+**Files**) — он выровнен по правому краю над боковой панелью и имеет её
+ширину, поэтому виден всё время, пока панель прокручивается (выпадающий
+список, три подписи-вкладки уже не помещались).  Вид
 Files — это таймлайн файловых операций по всей трассе: строки **Read**,
 **Update** и **Changed on card** показывают те же имена файлов, что и вид Map,
 а щелчок по строке переходит прямо к APDU в трассе и оставляет его
diff --git a/frontend/index.html b/frontend/index.html
index a643c31..69518dd 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -9,6 +9,11 @@
 <link rel="icon" type="image/png" href="favicon.png">
 <meta name="theme-color" content="#0f172a">
 <style>
+:root {
+    /* Layout sizes (theme-independent) */
+    --side-panel-w: 260px;
+}
+
 :root, [data-theme="dark"] {
     --bg: #0f172a;
     --bg-panel: #1e293b;
@@ -104,10 +109,11 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
 
 /* Trace view */
 .trace-topbar { display: flex; gap: 12px; padding: 12px 16px; background: var(--bg-panel); align-items: center; flex-shrink: 0; }
-.trace-topbar input { flex: 0 1 33.333%; padding: 8px 12px; background: var(--bg-input); border: 1px solid var(--border); border-radius: 4px; color: var(--text); }
+.trace-topbar input { flex: 0 1 16.667%; padding: 8px 12px; background: var(--bg-input); border: 1px solid var(--border); border-radius: 4px; color: var(--text); }
 .trace-topbar input::placeholder { color: var(--text-muted); }
 .trace-topbar select { padding: 8px 12px; background: var(--bg-input); border: 1px solid var(--border); border-radius: 4px; color: var(--text); }
 .trace-topbar .filter-label { color: var(--text-muted); font-size: 13px; white-space: nowrap; }
+.trace-topbar #session-name-display { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
 .trace-topbar button { padding: 8px 16px; background: var(--accent); color: #fff; border: none; border-radius: 4px; cursor: pointer; font-weight: 600; }
 .trace-topbar button:hover { background: var(--accent-hover); }
 .trace-topbar button.stop { background: var(--danger); color: #fff; }
@@ -171,7 +177,7 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
 .detail-body td.name { color: var(--accent); font-weight: 600; }
 
 /* Side panel */
-.side-panel { width: 260px; background: var(--bg-panel); padding: 12px; overflow-y: auto; flex-shrink: 0; border-left: 1px solid var(--bg-input); }
+.side-panel { width: var(--side-panel-w); background: var(--bg-panel); padding: 12px; overflow-y: auto; flex-shrink: 0; border-left: 1px solid var(--bg-input); }
 .side-panel h3 { color: var(--accent); margin-bottom: 8px; font-size: 13px; text-transform: uppercase; letter-spacing: 1px; }
 .side-item { display: flex; justify-content: space-between; padding: 3px 8px; cursor: pointer; border-radius: 4px; font-size: 13px; }
 .side-item:hover { background: var(--bg-input); }
@@ -179,8 +185,11 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
 .side-tabs { display: flex; margin-bottom: 8px; border-bottom: 1px solid var(--bg-input); }
 .side-tab { flex: 1; padding: 6px 0; background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 12px; text-transform: uppercase; letter-spacing: 1px; border-bottom: 2px solid transparent; }
 .side-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
-.side-view-select { width: 100%; margin-bottom: 8px; padding: 6px 8px; background: var(--bg-input); color: var(--text);
-    border: 1px solid var(--border); border-radius: 4px; font-size: 12px; text-transform: uppercase; letter-spacing: 1px; cursor: pointer; }
+/* Side-panel view selector: it lives in the trace topbar, right-aligned over
+   the side panel with the panel's width, so it stays visible while the panel
+   scrolls.  The negative right margin cancels the topbar's 16px padding, so
+   its right edge lines up with the panel's. */
+.trace-topbar .side-view-select { width: var(--side-panel-w); flex: 0 0 auto; margin-left: auto; margin-right: -16px; }
 .file-op { display: flex; align-items: baseline; gap: 6px; padding: 3px 8px; cursor: pointer; border-radius: 4px; font-size: 13px; word-break: break-word; }
 .file-op:hover { background: var(--bg-input); }
 .file-op-read { color: var(--text-muted); }
@@ -330,7 +339,7 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
         <div class="header-tab" data-tab="sessions" data-l10n="Sessions">Sessions</div>
         <div class="header-tab" data-tab="settings" data-l10n="Settings">Settings</div>
     </div>
-    <div class="header-title">UICC <a href="https://osmocom.org/projects/baseband/wiki/GSMTAP" target="_blank" rel="noopener">GSMTAP</a> <span data-l10n="trace analyser">trace analyser</span> <span class="pwa-version" id="pwa-version"></span></div>
+    <div class="header-title"><a href="https://osmocom.org/projects/baseband/wiki/GSMTAP" target="_blank" rel="noopener">GSMTAP</a> <span data-l10n="trace analyser">trace analyser</span> <span class="pwa-version" id="pwa-version"></span></div>
     <div class="header-right">
         <span class="capture-chip" id="capture-chip" style="display:none"></span>
         <button id="install-btn" data-l10n="Install PWA">Install PWA</button>
@@ -348,6 +357,11 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
         <option value="" data-l10n="All commands">All commands</option>
     </select>
     <span id="session-name-display" style="display:none; color:var(--text-muted); font-size:15px; font-weight:700;"></span>
+    <select class="side-view-select" id="side-view-select" aria-label="Side panel view">
+        <option value="map" data-l10n="Map">Map</option>
+        <option value="stats" data-l10n="Stats">Stats</option>
+        <option value="files" data-l10n="Files">Files</option>
+    </select>
 </div>
     <div class="trace-main">
         <div class="trace-left">
@@ -358,11 +372,6 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
             </div>
         </div>
         <div class="side-panel" id="side-panel">
-            <select class="side-view-select" id="side-view-select" aria-label="Side panel view">
-                <option value="map" data-l10n="Map">Map</option>
-                <option value="stats" data-l10n="Stats">Stats</option>
-                <option value="files" data-l10n="Files">Files</option>
-            </select>
             <div id="type-counts">—</div>
             <div id="type-map" style="display:none">—</div>
             <div id="file-view" style="display:none">—</div>
@@ -3216,7 +3225,7 @@ function onFilterChange() {
 }
 
 // ──────────────────── Versioning ────────────────────
-const PWA_VERSION = '2.6.2';
+const PWA_VERSION = '2.6.3';
 const MIN_SERVER_VERSION = '2.3.0';
 
 function parseVersion(v) {
diff --git a/frontend/sw.js b/frontend/sw.js
index b8f2b8e..412a149 100644
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -1,4 +1,4 @@
-const CACHE = 'simtrace-analyser-v76';
+const CACHE = 'simtrace-analyser-v77';
 
 const PRECACHE = [
     'index.html',
diff --git a/frontend/tests/comprion.test.js b/frontend/tests/comprion.test.js
index fb70f4c..ba1ee68 100644
--- a/frontend/tests/comprion.test.js
+++ b/frontend/tests/comprion.test.js
@@ -324,8 +324,14 @@ test('Files view: the hex image respects the row limit', () => {
 	assert.equal(view.end, 64);
 });
 
-test('Files view: side-panel dropdown and the timeline are wired', () => {
+test('Files view: the view selector (topbar) and the timeline are wired', () => {
 	assert.match(src, /<select class="side-view-select" id="side-view-select"[^>]*>/);
+	// The selector is a topbar control (before the two-column trace area), so
+	// it stays visible while the side panel scrolls.
+	const topbar = src.indexOf('<div class="trace-topbar">');
+	const sel = src.indexOf('id="side-view-select"');
+	const main = src.indexOf('<div class="trace-main">');
+	assert.ok(topbar >= 0 && topbar < sel && sel < main, 'selector in the topbar');
 	assert.match(src, /<option value="files" data-l10n="Files">/);
 	assert.doesNotMatch(src, /class="side-tab/);
 	assert.match(src, /id="file-view"/);
diff --git a/frontend/tests/style.test.js b/frontend/tests/style.test.js
index 3bf794e..503e350 100644
--- a/frontend/tests/style.test.js
+++ b/frontend/tests/style.test.js
@@ -21,3 +21,29 @@ test('no per-element scrollbar overrides or thin default remain', () => {
 	assert.doesNotMatch(src, /\.side-panel::-webkit-scrollbar/);
 	assert.doesNotMatch(src, /::-webkit-scrollbar \{ width: 6px/);
 });
+
+// ── trace topbar layout ────────────────────────────────────────────────
+
+test('the view selector sits over the side panel at the panel width', () => {
+	// one layout variable keeps the two the same width
+	assert.match(src, /--side-panel-w: 260px;/);
+	assert.match(src, /\.side-panel \{ width: var\(--side-panel-w\);/);
+	assert.match(src, /\.trace-topbar \.side-view-select \{ width: var\(--side-panel-w\); flex: 0 0 auto; margin-left: auto; margin-right: -16px; \}/);
+	// the selector is a topbar control (before the two-column trace area,
+	// which keeps it visible while the panel scrolls)
+	const topbar = src.indexOf('<div class="trace-topbar">');
+	const sel = src.indexOf('id="side-view-select"');
+	const main = src.indexOf('<div class="trace-main">');
+	assert.ok(topbar >= 0 && topbar < sel && sel < main, 'selector in the topbar');
+});
+
+test('the search input is half its previous width', () => {
+	assert.match(src, /\.trace-topbar input \{ flex: 0 1 16\.667%;/);
+	// a long session name ellipsizes rather than wrapping the now tighter row
+	assert.match(src, /\.trace-topbar #session-name-display \{ white-space: nowrap; overflow: hidden; text-overflow: ellipsis; \}/);
+});
+
+test('the header title carries no UICC prefix', () => {
+	assert.match(src, /<div class="header-title"><a href="https:\/\/osmocom\.org\/projects\/baseband\/wiki\/GSMTAP"/);
+	assert.doesNotMatch(src, /class="header-title">UICC/);
+});
diff --git a/pyproject.toml b/pyproject.toml
index 98abda8..d0f8660 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.backends._legacy:_Backend"
 
 [project]
 name = "simtrace-analyser"
-version = "2.6.2"
+version = "2.6.3"
 description = "SIMtrace Analyser — APDU trace analyser for GSMTAP/PCAP captures (bundles the simtrace2-pysniff utility)"
 readme = {file = "README.md", content-type = "text/markdown"}
 license = {text = "GPL-2.0-or-later"}
diff --git a/simtrace_analyser/version.py b/simtrace_analyser/version.py
index 4a4cf79..d522600 100644
--- a/simtrace_analyser/version.py
+++ b/simtrace_analyser/version.py
@@ -1,3 +1,3 @@
 """Single source of truth for the SIMtrace Analyser version."""
 
-__version__ = '2.6.2'
+__version__ = '2.6.3'
diff --git a/tests/test_pcap_import.py b/tests/test_pcap_import.py
index ec30456..af3417f 100644
--- a/tests/test_pcap_import.py
+++ b/tests/test_pcap_import.py
@@ -224,7 +224,7 @@ class TestImportEndpoint(unittest.TestCase):
 class TestVersion(unittest.TestCase):
     def test_package_version(self):
         from simtrace2_pysniff import __version__
-        self.assertEqual(__version__, '2.6.2')
+        self.assertEqual(__version__, '2.6.3')
 
     def test_status_includes_version(self):
         import os