refactor: remove performance insights (Web Vitals) feature entirely

Remove Performance tab, PerformanceStats component, settings toggle,
Web Vitals observers from tracking script, and all related API types
and SWR hooks. Duration tracking is preserved.

components/dashboard/PerformanceStats.tsx

@@ -1,243 +0,0 @@
-'use client'
-
-import { useState, useEffect } from 'react'
-import { PerformanceStats as Stats, PerformanceByPageStat, getPerformanceByPage } from '@/lib/api/stats'
-import { Select } from '@ciphera-net/ui'
-import { TableSkeleton } from '@/components/skeletons'
-
-interface Props {
-  stats: Stats | null
-  performanceByPage?: PerformanceByPageStat[] | null
-  siteId?: string
-  startDate?: string
-  endDate?: string
-  getPerformanceByPage?: typeof getPerformanceByPage
-}
-
-type Score = 'good' | 'needs-improvement' | 'poor'
-
-const getScore = (metric: 'lcp' | 'cls' | 'inp', value: number): Score => {
-  if (metric === 'lcp') return value <= 2500 ? 'good' : value <= 4000 ? 'needs-improvement' : 'poor'
-  if (metric === 'cls') return value <= 0.1 ? 'good' : value <= 0.25 ? 'needs-improvement' : 'poor'
-  if (metric === 'inp') return value <= 200 ? 'good' : value <= 500 ? 'needs-improvement' : 'poor'
-  return 'good'
-}
-
-const scoreColors = {
-  good: 'text-green-600 bg-green-50 dark:bg-green-900/20 dark:text-green-400 border-green-200 dark:border-green-800',
-  'needs-improvement': 'text-yellow-600 bg-yellow-50 dark:bg-yellow-900/20 dark:text-yellow-400 border-yellow-200 dark:border-yellow-800',
-  poor: 'text-red-600 bg-red-50 dark:bg-red-900/20 dark:text-red-400 border-red-200 dark:border-red-800',
-}
-
-const badgeColors = {
-  good: 'text-green-700 dark:text-green-400 bg-green-100 dark:bg-green-900/30 border-green-200 dark:border-green-800',
-  'needs-improvement': 'text-yellow-700 dark:text-yellow-400 bg-yellow-100 dark:bg-yellow-900/30 border-yellow-200 dark:border-yellow-800',
-  poor: 'text-red-700 dark:text-red-400 bg-red-100 dark:bg-red-900/30 border-red-200 dark:border-red-800',
-}
-
-function MetricCard({ label, value, unit, score }: { label: string, value: string, unit: string, score: Score | null }) {
-  const noData = score === null
-  const colorClass = noData
-    ? 'text-neutral-500 bg-neutral-50 dark:bg-neutral-800/50 dark:text-neutral-400 border-neutral-200 dark:border-neutral-700'
-    : scoreColors[score]
-
-  return (
-    <div className={`p-4 rounded-lg border ${colorClass}`}>
-      <div className="text-sm font-medium opacity-80 mb-1">{label}</div>
-      <div className="text-2xl font-bold">
-        {value}
-        {unit && <span className="text-sm font-normal ml-1 opacity-70">{unit}</span>}
-      </div>
-    </div>
-  )
-}
-
-function formatMetricValue(metric: 'lcp' | 'cls' | 'inp', val: number | null): string {
-  if (val == null) return 'No data'
-  if (metric === 'cls') return val.toFixed(3)
-  return `${Math.round(val)}`
-}
-
-function formatMetricCell(metric: 'lcp' | 'cls' | 'inp', val: number | null): string {
-  if (val == null) return '\u2014'
-  if (metric === 'cls') return val.toFixed(3)
-  return `${Math.round(val)} ms`
-}
-
-export default function PerformanceStats({ stats, performanceByPage, siteId, startDate, endDate, getPerformanceByPage }: Props) {
-  const [sortBy, setSortBy] = useState<'lcp' | 'cls' | 'inp'>('lcp')
-  const [overrideRows, setOverrideRows] = useState<PerformanceByPageStat[] | null>(null)
-  const [loadingTable, setLoadingTable] = useState(false)
-
-  useEffect(() => {
-    setOverrideRows(null)
-  }, [performanceByPage])
-
-  const rows = overrideRows ?? performanceByPage ?? []
-  const canRefetch = Boolean(getPerformanceByPage && siteId && startDate && endDate)
-
-  const handleSortChange = (value: string) => {
-    const v = value as 'lcp' | 'cls' | 'inp'
-    setSortBy(v)
-    if (!getPerformanceByPage || !siteId || !startDate || !endDate) return
-    setLoadingTable(true)
-    getPerformanceByPage(siteId, startDate, endDate, { sort: v, limit: 20 })
-      .then(setOverrideRows)
-      .finally(() => setLoadingTable(false))
-  }
-
-  const hasData = stats && stats.samples > 0
-  const lcp = stats?.lcp ?? null
-  const cls = stats?.cls ?? null
-  const inp = stats?.inp ?? null
-
-  const lcpScore = lcp != null ? getScore('lcp', lcp) : null
-  const clsScore = cls != null ? getScore('cls', cls) : null
-  const inpScore = inp != null ? getScore('inp', inp) : null
-
-  // Overall score: worst of available metrics
-  let overallScore: Score | null = null
-  if (hasData) {
-    const scores = [lcpScore, clsScore, inpScore].filter((s): s is Score => s !== null)
-    if (scores.length > 0) {
-      if (scores.includes('poor')) overallScore = 'poor'
-      else if (scores.includes('needs-improvement')) overallScore = 'needs-improvement'
-      else overallScore = 'good'
-    }
-  }
-
-  const overallLabel = overallScore
-    ? { good: 'Good', 'needs-improvement': 'Needs improvement', poor: 'Poor' }[overallScore]
-    : 'No data'
-
-  const overallBadgeClass = overallScore
-    ? badgeColors[overallScore]
-    : 'text-neutral-500 dark:text-neutral-400 bg-neutral-100 dark:bg-neutral-800 border-neutral-200 dark:border-neutral-700'
-
-  const getCellScoreClass = (score: Score) => {
-    const m: Record<string, string> = {
-      good: 'text-green-600 dark:text-green-400',
-      'needs-improvement': 'text-yellow-600 dark:text-yellow-400',
-      poor: 'text-red-600 dark:text-red-400',
-    }
-    return m[score] ?? ''
-  }
-
-  const getCellClass = (metric: 'lcp' | 'cls' | 'inp', val: number | null) => {
-    if (val == null) return 'text-neutral-400 dark:text-neutral-500'
-    return getCellScoreClass(getScore(metric, val))
-  }
-
-  return (
-    <div className="space-y-6">
-      {/* Overall badge + summary */}
-      <div className="flex items-center gap-3">
-        <span className={`rounded-md border px-2.5 py-1 text-sm font-medium ${overallBadgeClass}`}>
-          {overallLabel}
-        </span>
-        {hasData && (
-          <span className="text-sm text-neutral-500">
-            Based on {stats.samples.toLocaleString()} session{stats.samples !== 1 ? 's' : ''} (p75 values)
-          </span>
-        )}
-      </div>
-
-      {/* Metric cards */}
-      <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
-        <MetricCard
-          label="Largest Contentful Paint (LCP)"
-          value={formatMetricValue('lcp', lcp)}
-          unit={lcp != null ? 'ms' : ''}
-          score={lcpScore}
-        />
-        <MetricCard
-          label="Cumulative Layout Shift (CLS)"
-          value={formatMetricValue('cls', cls)}
-          unit=""
-          score={clsScore}
-        />
-        <MetricCard
-          label="Interaction to Next Paint (INP)"
-          value={formatMetricValue('inp', inp)}
-          unit={inp != null ? 'ms' : ''}
-          score={inpScore}
-        />
-      </div>
-
-      {!hasData && (
-        <div className="text-sm text-neutral-500 bg-neutral-50 dark:bg-neutral-800/50 rounded-lg p-4 border border-neutral-200 dark:border-neutral-700">
-          No performance data collected yet. Core Web Vitals data will appear here once visitors browse your site with performance insights enabled.
-        </div>
-      )}
-
-      {hasData && (
-        <div className="text-xs text-neutral-500">
-          * 75th percentile (p75) calculated from real user sessions. Lower is better.
-        </div>
-      )}
-
-      {/* Worst pages by metric */}
-      <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6">
-        <div className="flex items-center justify-between gap-4 mb-4">
-          <h3 className="text-sm font-medium text-neutral-700 dark:text-neutral-300">
-            Slowest pages by metric
-          </h3>
-          {canRefetch && (
-            <Select
-              value={sortBy}
-              onChange={handleSortChange}
-              options={[
-                { value: 'lcp', label: 'Sort by LCP (worst)' },
-                { value: 'cls', label: 'Sort by CLS (worst)' },
-                { value: 'inp', label: 'Sort by INP (worst)' },
-              ]}
-              variant="input"
-              align="right"
-              className="min-w-[180px]"
-            />
-          )}
-        </div>
-        {loadingTable ? (
-          <TableSkeleton rows={5} cols={5} />
-        ) : rows.length === 0 ? (
-          <div className="py-6 text-center text-neutral-500 text-sm">
-            No per-page metrics yet. Data appears as visitors are tracked with performance insights enabled.
-          </div>
-        ) : (
-          <div className="overflow-x-auto -mx-1">
-            <table className="w-full text-sm">
-              <thead>
-                <tr className="border-b border-neutral-200 dark:border-neutral-700">
-                  <th className="text-left py-2 px-2 font-medium text-neutral-600 dark:text-neutral-400">Path</th>
-                  <th className="text-right py-2 px-2 font-medium text-neutral-600 dark:text-neutral-400">Samples</th>
-                  <th className="text-right py-2 px-2 font-medium text-neutral-600 dark:text-neutral-400">LCP</th>
-                  <th className="text-right py-2 px-2 font-medium text-neutral-600 dark:text-neutral-400">CLS</th>
-                  <th className="text-right py-2 px-2 font-medium text-neutral-600 dark:text-neutral-400">INP</th>
-                </tr>
-              </thead>
-              <tbody>
-                {rows.map((r) => (
-                  <tr key={r.path} className="border-b border-neutral-100 dark:border-neutral-800/80">
-                    <td className="py-2 px-2 text-neutral-900 dark:text-white font-mono truncate max-w-[200px]" title={r.path}>
-                      {r.path || '/'}
-                    </td>
-                    <td className="py-2 px-2 text-right text-neutral-600 dark:text-neutral-400">{r.samples}</td>
-                    <td className={`py-2 px-2 text-right font-mono ${getCellClass('lcp', r.lcp)}`}>
-                      {formatMetricCell('lcp', r.lcp)}
-                    </td>
-                    <td className={`py-2 px-2 text-right font-mono ${getCellClass('cls', r.cls)}`}>
-                      {formatMetricCell('cls', r.cls)}
-                    </td>
-                    <td className={`py-2 px-2 text-right font-mono ${getCellClass('inp', r.inp)}`}>
-                      {formatMetricCell('inp', r.inp)}
-                    </td>
-                  </tr>
-                ))}
-              </tbody>
-            </table>
-          </div>
-        )}
-      </div>
-    </div>
-  )
-}

components/dashboard/SiteNav.tsx

@@ -18,7 +18,6 @@ export default function SiteNav({ siteId }: SiteNavProps) {
 
   const tabs = [
     { label: 'Dashboard', href: `/sites/${siteId}` },
-    { label: 'Performance', href: `/sites/${siteId}/performance` },
     { label: 'Journeys', href: `/sites/${siteId}/journeys` },
     { label: 'Funnels', href: `/sites/${siteId}/funnels` },
     { label: 'Behavior', href: `/sites/${siteId}/behavior` },