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/rules/source-weights-panel.tsx

@@ -0,0 +1,48 @@
+import { useMemo } from 'react';
+import { WeightSliderRow } from './weight-slider-row';
+import { CollapsibleSection } from './collapsible-section';
+import { SOURCE_LABELS } from '@/lib/scoring';
+import type { PriorityConfig } from '@/lib/scoring';
+
+interface SourceWeightsPanelProps {
+    config: PriorityConfig;
+    onChange: (config: PriorityConfig) => void;
+}
+
+const SOURCE_ORDER = ['WHATSAPP', 'PHONE', 'FACEBOOK_AD', 'GOOGLE_AD', 'INSTAGRAM', 'WEBSITE', 'REFERRAL', 'WALK_IN', 'OTHER'];
+
+export const SourceWeightsPanel = ({ config, onChange }: SourceWeightsPanelProps) => {
+    const updateSource = (source: string, weight: number) => {
+        onChange({
+            ...config,
+            sourceWeights: { ...config.sourceWeights, [source]: weight },
+        });
+    };
+
+    const badge = useMemo(() => {
+        const weights = SOURCE_ORDER.map(s => config.sourceWeights[s] ?? 5);
+        const avg = weights.reduce((a, b) => a + b, 0) / weights.length;
+        const highest = SOURCE_ORDER.reduce((best, s) => (config.sourceWeights[s] ?? 5) > (config.sourceWeights[best] ?? 5) ? s : best, SOURCE_ORDER[0]);
+        return `Avg ${avg.toFixed(1)} · Top: ${SOURCE_LABELS[highest]}`;
+    }, [config.sourceWeights]);
+
+    return (
+        <CollapsibleSection
+            title="Source Weights"
+            subtitle="Leads from higher-weighted sources get priority"
+            badge={badge}
+            defaultOpen={false}
+        >
+            <div className="divide-y divide-tertiary">
+                {SOURCE_ORDER.map(source => (
+                    <WeightSliderRow
+                        key={source}
+                        label={SOURCE_LABELS[source] ?? source}
+                        weight={config.sourceWeights[source] ?? 5}
+                        onWeightChange={(w) => updateSource(source, w)}
+                    />
+                ))}
+            </div>
+        </CollapsibleSection>
+    );
+};