perf(analysis): virtualize the LOG viewer (smooth scroll/select on huge logs)

src/renderer/css/styles.css

@@ -931,12 +931,6 @@ input[type="date"] {
   outline-offset: -1px;
 }
 
-/* Active state for the viewer word-wrap toggle. */
-#btnAnaWrap.on {
-  color: var(--accent);
-  background: color-mix(in srgb, var(--accent) 14%, transparent);
-}
-
 .ana-row {
   display: flex;
   align-items: center;
@@ -1014,6 +1008,7 @@ input[type="date"] {
   height: 100%;
   overflow: auto;
   padding-right: 38px;
+  outline: none;
 }
 
 .ana-scroll::-webkit-scrollbar {
@@ -1269,11 +1264,6 @@ body.ana-ruler-dragging .ana-ruler-view {
 .ana-line {
   display: flex;
   align-items: flex-start;
-  /* Skip layout/paint work for off-screen lines so scrolling a large log stays
-     smooth. `auto` lets the browser remember each line's real height once seen,
-     keeping the scrollbar stable; ~20px matches the 12.5px/1.55 line-height. */
-  content-visibility: auto;
-  contain-intrinsic-size: auto 20px;
 }
 
 .ana-line:hover {

src/renderer/i18n/en.json

@@ -75,7 +75,6 @@
   "ana.hl.auto": "Auto",
   "ana.hl.none": "Off",
   "ana.copy": "Copy",
-  "ana.wrap.title": "Toggle word wrap",
   "ana.zoomIn.title": "Zoom in (Ctrl +)",
   "ana.zoomOut.title": "Zoom out (Ctrl -)",
   "ana.ai": "AI",

src/renderer/i18n/zh.json

@@ -75,7 +75,6 @@
   "ana.hl.auto": "自動",
   "ana.hl.none": "關閉",
   "ana.copy": "複製",
-  "ana.wrap.title": "切換自動換行",
   "ana.zoomIn.title": "放大字級 (Ctrl +)",
   "ana.zoomOut.title": "縮小字級 (Ctrl -)",
   "ana.ai": "AI",

src/renderer/index.html

@@ -244,9 +244,6 @@ <h2 data-i18n="ana.files">檔案</h2>
                 <h2 id="anaViewName" data-i18n="ana.viewer">檢視</h2>
                 <div class="log-tools">
                   <span class="counter" id="anaViewMeta"></span>
-                  <button class="btn btn-ghost btn-sm" id="btnAnaWrap" type="button" data-i18n-title="ana.wrap.title" title="切換自動換行">
-                    <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="3" y1="6" x2="21" y2="6"/><path d="M3 12h15a3 3 0 0 1 0 6h-4"/><polyline points="16 16 14 18 16 20"/><line x1="3" y1="18" x2="9" y2="18"/></svg>
-                  </button>
                   <button class="btn btn-ghost btn-sm" id="btnAnaZoomOut" type="button" data-i18n-title="ana.zoomOut.title" title="縮小字級">A-</button>
                   <button class="btn btn-ghost btn-sm" id="btnAnaZoomIn" type="button" data-i18n-title="ana.zoomIn.title" title="放大字級">A+</button>
                   <button class="btn btn-ghost btn-sm" id="btnAnaCopy" data-i18n="ana.copy">複製</button>
@@ -297,7 +294,7 @@ <h2 id="anaViewName" data-i18n="ana.viewer">檢視</h2>
                     <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg>
                   </button>
                 </div>
-                <div class="ana-scroll" id="anaScroll">
+                <div class="ana-scroll" id="anaScroll" tabindex="-1">
                   <div class="ana-code" id="anaViewContent"></div>
                 </div>
                 <div class="ana-ruler" id="anaRuler" hidden>