phase-2: extract shared utils

ui/src/routes/+page.svelte

@@ -1,5 +1,6 @@
 <script>
   import { screenTickers, fetchCatalysts, analyzeTickers } from '$lib/api.js';
+  import { sigOrd, sorted, verdictShort, vClass, fmtPE } from '$lib/utils.js';
   import SignalBadge from '$lib/SignalBadge.svelte';
   import Spinner from '$lib/Spinner.svelte';
 
@@ -72,25 +73,6 @@
     }
   }
 
-  const sigOrd = s => ({'✅ Strong Buy':0,'⚡ Momentum':1,'🔄 Neutral':2,'⚠️  Speculation':3,'❌ Avoid':4})[s] ?? 5;
-  const sorted = arr => [...(arr ?? [])].sort((a, b) => sigOrd(a.signal) - sigOrd(b.signal));
-
-  const verdictShort = label => {
-    if (!label) return '—';
-    if (label.includes('High Conviction')) return 'Strong';
-    if (label.includes('Speculative'))     return 'Speculative';
-    if (label.includes('BUY'))             return 'Buy';
-    if (label.includes('Efficient'))       return 'Efficient';
-    if (label.includes('Attractive'))      return 'Attractive';
-    if (label.includes('Neutral'))         return 'Hold';
-    if (label.includes('REJECT'))          return 'Reject';
-    if (label.includes('Avoid'))           return 'Avoid';
-    return label.replace(/[🟢🟡🔴]/u, '').trim();
-  };
-
-  const vClass = label =>
-    label?.startsWith('🟢') ? 'green' : label?.startsWith('🟡') ? 'yellow' : 'red';
-
   const getTab = type => activeTab[type] ?? 'inflated';
   const setTab = (type, tab) => activeTab = { ...activeTab, [type]: tab };
 
@@ -98,8 +80,6 @@
   const allAssets = $derived(results
     ? sorted([...results.STOCK, ...results.ETF, ...results.BOND])
     : []);
-
-  const fmtPE = v => v != null ? v + 'x' : '—';
 </script>
 
 <div class="page">
@@ -340,8 +320,8 @@
 
 <!-- ── LLM Analysis Sidebar ─────────────────────────────────────────────── -->
 {#if sidebar.open}
-  <!-- svelte-ignore a11y_click_events_have_key_events a11y_no_static_element_interactions -->
-  <div class="sidebar-backdrop" onclick={closeSidebar}></div>
+  <div class="sidebar-backdrop" role="button" tabindex="-1" aria-label="Close sidebar"
+    onclick={closeSidebar} onkeydown={(e) => e.key === 'Escape' && closeSidebar()}></div>
   <aside class="sidebar">
     <div class="sidebar-header">
       <div class="sidebar-title">