feat: rules engine — priority config UI + worklist scoring

- Rules engine spec v2 (priority vs automation rules distinction)
- Priority Rules settings page with weight sliders, SLA config, campaign/source weights
- Collapsible config sections with dynamic headers
- Live worklist preview panel with client-side scoring
- AI assistant panel (collapsible) with rules-engine-specific system prompt
- Worklist panel: score display with SLA status dots, sort by score
- Scoring library (scoring.ts) for client-side preview computation
- Sidebar: Rules Engine nav item under Configuration

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/layout/sidebar.tsx

@@ -18,6 +18,7 @@ import {
     faChartLine,
     faFileAudio,
     faPhoneMissed,
+    faSlidersUp,
 } from "@fortawesome/pro-duotone-svg-icons";
 import { faIcon } from "@/lib/icon-wrapper";
 import { useAtom } from "jotai";
@@ -51,6 +52,7 @@ const IconTowerBroadcast = faIcon(faTowerBroadcast);
 const IconChartLine = faIcon(faChartLine);
 const IconFileAudio = faIcon(faFileAudio);
 const IconPhoneMissed = faIcon(faPhoneMissed);
+const IconSlidersUp = faIcon(faSlidersUp);
 
 type NavSection = {
     label: string;
@@ -76,6 +78,9 @@ const getNavSections = (role: string): NavSection[] => {
             { label: 'Marketing', items: [
                 { label: 'Campaigns', href: '/campaigns', icon: IconBullhorn },
             ]},
+            { label: 'Configuration', items: [
+                { label: 'Rules Engine', href: '/rules', icon: IconSlidersUp },
+            ]},
             { label: 'Admin', items: [
                 { label: 'Settings', href: '/settings', icon: IconGear },
             ]},