fix(i18n): improve English layout for homepage left-pane and report title

- Add sans-serif font for English left-pane (status, workflow sections)
- Shorten English workflow step descriptions
- Reduce English report title font-size from 36px to 28px

frontend/src/components/Step4Report.vue

@@ -5153,3 +5153,10 @@ watch(() => props.reportId, (newId) => {
 .log-msg.warning { color: #FFA726; }
 .log-msg.success { color: #66BB6A; }
 </style>
+
+<style>
+/* English locale: smaller report title */
+html[lang="en"] .report-header-block .main-title {
+  font-size: 28px;
+}
+</style>

frontend/src/components/Step5Interaction.vue

@@ -2575,3 +2575,10 @@ watch(() => props.simulationId, (newId) => {
   margin: 24px 0;
 }
 </style>
+
+<style>
+/* English locale: smaller report title */
+html[lang="en"] .report-header-block .main-title {
+  font-size: 28px;
+}
+</style>