Stabilize runtime auth and E2E coverage

apps/web/src/styles/global.css

@@ -23,7 +23,7 @@ body {
   color: var(--text-strong);
   font-size: var(--fs-body);
   line-height: 1.6;
-  letter-spacing: -0.01em;
+  letter-spacing: 0;
   -webkit-font-smoothing: antialiased;
   text-rendering: optimizeLegibility;
 }
@@ -90,7 +90,7 @@ svg {
 /* ── 공통 유틸 ── */
 .tabular {
   font-variant-numeric: tabular-nums;
-  letter-spacing: -0.01em;
+  letter-spacing: 0;
 }
 
 .visually-hidden {