refactor(frontend): the sweep pane's column wrapper joins sweep-shared.css (#3207)

.sweep was the one rule still written identically in both sweep panes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/assets/sweep-shared.css

@@ -14,6 +14,9 @@
  * style — rather than growing a modifier here per pane.
  */
 
+/* The pane itself: header, filters, rows and footnote stacked. */
+.sweep { display: flex; flex-direction: column; gap: var(--fs-space-3); }
+
 .sweep-lede {
   margin: 0;
   max-width: 62ch;

frontend/src/components/NoteSweepPane.vue

@@ -143,7 +143,6 @@ defineExpose({ reload });
 </template>
 
 <style scoped>
-.sweep { display: flex; flex-direction: column; gap: var(--fs-space-3); }
 h2 { margin: 0; font-size: 1.05rem; }
 .sweep-lede { margin-top: 0.35rem; }
 /* A check can be a long URL or command with no break point. */

frontend/src/components/rules/RuleSweepPane.vue

@@ -104,7 +104,6 @@ onMounted(reload);
 
 <style src="@/assets/rules-shared.css" />
 <style scoped>
-.sweep { display: flex; flex-direction: column; gap: var(--fs-space-3); }
 .statement { margin: 0.35rem 0 0; font-size: 0.88rem; color: var(--fs-text-secondary); }
 
 .sweep-filter select {