fix: frontend consistency audit — 55 files cleaned up

Consistency fixes:
- Extract getThisWeekRange/getThisMonthRange to shared lib/utils/dateRanges.ts
  (removed 4 identical copy-pasted definitions)
- Add error boundaries for behavior, cdn, search, pagespeed pages
  (4 new error.tsx files — previously fell through to generic parent error)
- Add "View setup guide" CTA to empty states on journeys and behavior pages
  (previously showed text with no actionable button)
- Fix non-lazy useState initializer in funnel detail page
- Fix Bot & Spam settings header from text-xl to text-2xl (matches all other sections)
- Add useMinimumLoading to PageSpeed skeleton (consistent with all other pages)

Cleanup:
- Remove 438 redundant dark: class prefixes (app is dark-mode only)
  text-neutral-500 dark:text-neutral-400 → text-neutral-400 (206 occurrences)
  text-neutral-900 dark:text-white → text-white (232 occurrences)
- Remove dead @stripe/react-stripe-js and @stripe/stripe-js packages
  (billing migrated to Polar, no code imports Stripe)
- Remove duplicate motion package (framer-motion is the one actually used)

components/dashboard/Chart.tsx

@@ -322,7 +322,7 @@ export default function Chart({
               >
                 <div className={cn('text-[10px] font-semibold uppercase tracking-widest mb-2', metric === m.key ? 'text-brand-orange' : 'text-neutral-400 dark:text-neutral-500')}>{m.label}</div>
                 <div className="flex items-baseline gap-2">
-                  <AnimatedNumber value={m.value} format={m.format} className="text-2xl font-bold text-neutral-900 dark:text-white" />
+                  <AnimatedNumber value={m.value} format={m.format} className="text-2xl font-bold text-white" />
                   {m.change !== null && (
                     <span className={cn('flex items-center gap-0.5 text-sm font-semibold', m.isPositive ? 'text-[#10B981]' : 'text-[#EF4444]')}>
                       {m.isPositive ? <ArrowUpRight weight="bold" className="size-3.5" /> : <ArrowDownRight weight="bold" className="size-3.5" />}
@@ -357,7 +357,7 @@ export default function Chart({
           {/* Toolbar */}
           <div className="flex items-center justify-between gap-3 mb-4 px-2">
             <div className="flex items-center gap-3">
-              <span className="text-xs font-medium text-neutral-500 dark:text-neutral-400">
+              <span className="text-xs font-medium text-neutral-400">
                 {METRIC_CONFIGS.find((m) => m.key === metric)?.label}
               </span>
             </div>
@@ -526,7 +526,7 @@ export default function Chart({
                                   <span className="font-medium text-neutral-400 dark:text-neutral-500">
                                     {ANNOTATION_LABELS[a.category] || 'Note'} &middot; {formatEU(a.date)}{a.time ? ` at ${a.time}` : ''}
                                   </span>
-                                  <p className="text-neutral-900 dark:text-white">{a.text}</p>
+                                  <p className="text-white">{a.text}</p>
                                 </div>
                               </div>
                             ))}
@@ -593,16 +593,16 @@ export default function Chart({
       {annotationForm.visible && (
         <div className="absolute inset-0 z-50 flex items-center justify-center bg-black/20 dark:bg-black/40 rounded-2xl">
           <div className="bg-white dark:bg-neutral-800 border border-neutral-200 dark:border-neutral-700 rounded-xl shadow-xl p-5 w-[340px] max-w-[90%]">
-            <h3 className="text-sm font-semibold text-neutral-900 dark:text-white mb-3">
+            <h3 className="text-sm font-semibold text-white mb-3">
               {annotationForm.editingId ? 'Edit annotation' : 'Add annotation'}
             </h3>
             <div className="space-y-3">
               <div>
-                <label className="block text-xs font-medium text-neutral-500 dark:text-neutral-400 mb-1">Date</label>
+                <label className="block text-xs font-medium text-neutral-400 mb-1">Date</label>
                 <button
                   type="button"
                   onClick={() => setCalendarOpen(true)}
-                  className="w-full px-3 py-1.5 text-sm rounded-lg border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 text-neutral-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-brand-orange/30 text-left flex items-center justify-between"
+                  className="w-full px-3 py-1.5 text-sm rounded-lg border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 text-white focus:outline-none focus:ring-2 focus:ring-brand-orange/30 text-left flex items-center justify-between"
                 >
                   <span>{annotationForm.date ? formatEU(annotationForm.date) : 'Select date'}</span>
                   <svg className="w-4 h-4 text-neutral-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
@@ -611,7 +611,7 @@ export default function Chart({
                 </button>
               </div>
               <div>
-                <label className="block text-xs font-medium text-neutral-500 dark:text-neutral-400 mb-1">
+                <label className="block text-xs font-medium text-neutral-400 mb-1">
                   Time <span className="text-neutral-400 dark:text-neutral-500">(optional)</span>
                 </label>
                 <div className="flex items-center gap-2">
@@ -619,7 +619,7 @@ export default function Chart({
                     type="time"
                     value={annotationForm.time}
                     onChange={(e) => setAnnotationForm((f) => ({ ...f, time: e.target.value }))}
-                    className="flex-1 px-3 py-1.5 text-sm rounded-lg border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 text-neutral-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-brand-orange/30"
+                    className="flex-1 px-3 py-1.5 text-sm rounded-lg border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 text-white focus:outline-none focus:ring-2 focus:ring-brand-orange/30"
                   />
                   {annotationForm.time && (
                     <button
@@ -634,20 +634,20 @@ export default function Chart({
                 </div>
               </div>
               <div>
-                <label className="block text-xs font-medium text-neutral-500 dark:text-neutral-400 mb-1">Note</label>
+                <label className="block text-xs font-medium text-neutral-400 mb-1">Note</label>
                 <input
                   type="text"
                   value={annotationForm.text}
                   onChange={(e) => setAnnotationForm((f) => ({ ...f, text: e.target.value.slice(0, 200) }))}
                   placeholder="e.g. Launched new homepage"
                   maxLength={200}
-                  className="w-full px-3 py-1.5 text-sm rounded-lg border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 text-neutral-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-brand-orange/30"
+                  className="w-full px-3 py-1.5 text-sm rounded-lg border border-neutral-200 dark:border-neutral-700 bg-white dark:bg-neutral-900 text-white focus:outline-none focus:ring-2 focus:ring-brand-orange/30"
                   autoFocus
                 />
                 <span className="text-[10px] text-neutral-400 mt-0.5 block text-right">{annotationForm.text.length}/200</span>
               </div>
               <div>
-                <label className="block text-xs font-medium text-neutral-500 dark:text-neutral-400 mb-1">Category</label>
+                <label className="block text-xs font-medium text-neutral-400 mb-1">Category</label>
                 <Select
                   value={annotationForm.category}
                   onChange={(v) => setAnnotationForm((f) => ({ ...f, category: v }))}
@@ -675,7 +675,7 @@ export default function Chart({
                 <button
                   type="button"
                   onClick={() => setAnnotationForm({ visible: false, date: '', time: '', text: '', category: 'other' })}
-                  className="px-3 py-1.5 text-xs font-medium text-neutral-500 dark:text-neutral-400 hover:text-neutral-700 dark:hover:text-neutral-200 cursor-pointer"
+                  className="px-3 py-1.5 text-xs font-medium text-neutral-400 hover:text-neutral-700 dark:hover:text-neutral-200 cursor-pointer"
                 >
                   Cancel
                 </button>

components/dashboard/ExportModal.tsx

@@ -480,7 +480,7 @@ export default function ExportModal({ isOpen, onClose, data, stats, topPages, to
         {/* Progress Bar */}
         {(isExporting || exportDone) && (
           <div className="space-y-2 pt-2">
-            <div className="flex items-center justify-between text-xs text-neutral-500 dark:text-neutral-400">
+            <div className="flex items-center justify-between text-xs text-neutral-400">
               <span>{exportDone ? 'Export complete' : exportProgress.label}</span>
               <span>{exportDone ? '100%' : `${Math.round((exportProgress.step / exportProgress.total) * 100)}%`}</span>
             </div>

components/dashboard/FilterBar.tsx

@@ -29,7 +29,7 @@ export default function FilterBar({ filters, onRemove, onClear }: FilterBarProps
       {filters.length > 1 && (
         <button
           onClick={onClear}
-          className="px-2 py-1.5 text-xs font-medium text-neutral-500 dark:text-neutral-400 hover:text-neutral-900 dark:hover:text-white transition-colors cursor-pointer"
+          className="px-2 py-1.5 text-xs font-medium text-neutral-400 hover:text-neutral-900 dark:hover:text-white transition-colors cursor-pointer"
         >
           Clear all
         </button>

components/dashboard/SiteNav.tsx

@@ -46,7 +46,7 @@ export default function SiteNav({ siteId }: SiteNavProps) {
             tabIndex={isActive(tab.href) ? 0 : -1}
             className={`relative shrink-0 whitespace-nowrap px-3 py-2 text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand-orange rounded-t cursor-pointer -mb-px ${
               isActive(tab.href)
-                ? 'text-neutral-900 dark:text-white'
+                ? 'text-white'
                 : 'text-neutral-400 dark:text-neutral-500 hover:text-neutral-700 dark:hover:text-neutral-300'
             }`}
           >

components/dashboard/TopReferrers.tsx

@@ -97,7 +97,7 @@ export default function TopReferrers({ referrers, collectReferrers = true, siteI
         <div className="flex items-center justify-between mb-4">
           <div className="flex items-center gap-2">
             <ArrowSquareOut className="w-5 h-5 text-neutral-400 dark:text-neutral-500" weight="bold" />
-            <h3 className="text-lg font-semibold text-neutral-900 dark:text-white">
+            <h3 className="text-lg font-semibold text-white">
               Referrers
             </h3>
             {showViewAll && (
@@ -115,7 +115,7 @@ export default function TopReferrers({ referrers, collectReferrers = true, siteI
         <div className="space-y-2 flex-1 min-h-[270px]">
           {!collectReferrers ? (
             <div className="h-full flex flex-col items-center justify-center text-center px-4">
-              <p className="text-neutral-500 dark:text-neutral-400 text-sm">Referrer tracking is disabled in site settings</p>
+              <p className="text-neutral-400 text-sm">Referrer tracking is disabled in site settings</p>
             </div>
           ) : hasData ? (
             <>
@@ -132,7 +132,7 @@ export default function TopReferrers({ referrers, collectReferrers = true, siteI
                       className="absolute inset-y-0.5 left-0.5 bg-brand-orange/15 dark:bg-brand-orange/40 rounded-md transition-all"
                       style={{ width: `${barWidth}%` }}
                     />
-                    <div className="relative flex-1 truncate text-neutral-900 dark:text-white flex items-center gap-3">
+                    <div className="relative flex-1 truncate text-white flex items-center gap-3">
                       {renderReferrerIcon(ref.referrer)}
                       <span className="truncate" title={ref.referrer}>{getReferrerDisplayName(ref.referrer)}</span>
                     </div>
@@ -154,12 +154,12 @@ export default function TopReferrers({ referrers, collectReferrers = true, siteI
           ) : (
             <div className="h-full flex flex-col items-center justify-center text-center px-6 py-8 gap-3">
               <div className="rounded-full bg-neutral-100 dark:bg-neutral-800 p-4">
-                <GlobeIcon className="w-8 h-8 text-neutral-500 dark:text-neutral-400" />
+                <GlobeIcon className="w-8 h-8 text-neutral-400" />
               </div>
-              <h4 className="font-semibold text-neutral-900 dark:text-white">
+              <h4 className="font-semibold text-white">
                 No referrers yet
               </h4>
-              <p className="text-sm text-neutral-500 dark:text-neutral-400 max-w-xs">
+              <p className="text-sm text-neutral-400 max-w-xs">
                 Traffic sources will appear here when visitors come from external sites.
               </p>
               <Link
@@ -186,7 +186,7 @@ export default function TopReferrers({ referrers, collectReferrers = true, siteI
             value={modalSearch}
             onChange={(e) => setModalSearch(e.target.value)}
             placeholder="Search referrers..."
-            className="w-full px-3 py-2 mb-3 text-sm bg-neutral-50 dark:bg-neutral-800 border border-neutral-200 dark:border-neutral-700 rounded-lg text-neutral-900 dark:text-white placeholder-neutral-400 dark:placeholder-neutral-500 focus:outline-none focus:ring-2 focus:ring-brand-orange/50"
+            className="w-full px-3 py-2 mb-3 text-sm bg-neutral-50 dark:bg-neutral-800 border border-neutral-200 dark:border-neutral-700 rounded-lg text-white placeholder-neutral-400 dark:placeholder-neutral-500 focus:outline-none focus:ring-2 focus:ring-brand-orange/50"
           />
         </div>
         <div className="max-h-[80vh]">
@@ -208,7 +208,7 @@ export default function TopReferrers({ referrers, collectReferrers = true, siteI
                     onClick={() => { if (onFilter) { onFilter({ dimension: 'referrer', operator: 'is', values: [ref.referrer] }); setIsModalOpen(false) } }}
                     className={`flex items-center justify-between h-9 group hover:bg-neutral-50 dark:hover:bg-neutral-800 rounded-lg px-2 transition-colors${onFilter ? ' cursor-pointer' : ''}`}
                   >
-                    <div className="flex-1 truncate text-neutral-900 dark:text-white flex items-center gap-3">
+                    <div className="flex-1 truncate text-white flex items-center gap-3">
                       {renderReferrerIcon(ref.referrer)}
                       <span className="truncate" title={ref.referrer}>{getReferrerDisplayName(ref.referrer)}</span>
                     </div>