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/behavior/FrustrationByPageTable.tsx

@@ -34,11 +34,11 @@ export default function FrustrationByPageTable({ pages, loading }: FrustrationBy
   return (
     <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6 mb-8">
       <div className="flex items-center justify-between mb-1">
-        <h3 className="text-lg font-semibold text-neutral-900 dark:text-white">
+        <h3 className="text-lg font-semibold text-white">
           Frustration by Page
         </h3>
       </div>
-      <p className="text-sm text-neutral-500 dark:text-neutral-400 mb-4">
+      <p className="text-sm text-neutral-400 mb-4">
         Pages with the most frustration signals
       </p>
 
@@ -72,7 +72,7 @@ export default function FrustrationByPageTable({ pages, loading }: FrustrationBy
                     style={{ width: `${barWidth}%` }}
                   />
                   <span
-                    className="relative text-sm text-neutral-900 dark:text-white truncate max-w-[200px] sm:max-w-[300px]"
+                    className="relative text-sm text-white truncate max-w-[200px] sm:max-w-[300px]"
                     title={page.page_path}
                   >
                     {page.page_path}
@@ -84,7 +84,7 @@ export default function FrustrationByPageTable({ pages, loading }: FrustrationBy
                     <span className="w-12 text-right text-sm tabular-nums text-neutral-600 dark:text-neutral-400">
                       {formatNumber(page.dead_clicks)}
                     </span>
-                    <span className="w-12 text-right text-sm font-semibold tabular-nums text-neutral-900 dark:text-white">
+                    <span className="w-12 text-right text-sm font-semibold tabular-nums text-white">
                       {formatNumber(page.total)}
                     </span>
                     <span className="w-16 text-right text-sm tabular-nums text-neutral-600 dark:text-neutral-400">
@@ -99,14 +99,17 @@ export default function FrustrationByPageTable({ pages, loading }: FrustrationBy
       ) : (
         <div className="flex flex-col items-center justify-center text-center px-6 py-8 gap-4 min-h-[200px]">
           <div className="rounded-full bg-neutral-100 dark:bg-neutral-800 p-4">
-            <Files className="w-8 h-8 text-neutral-500 dark:text-neutral-400" />
+            <Files 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 frustration signals detected
           </h4>
-          <p className="text-sm text-neutral-500 dark:text-neutral-400 max-w-md">
+          <p className="text-sm text-neutral-400 max-w-md">
             Page-level frustration data will appear here once rage clicks or dead clicks are detected on your site.
           </p>
+          <a href="/installation" target="_blank" rel="noopener noreferrer" className="mt-1 text-sm font-medium text-brand-orange hover:underline">
+            View setup guide
+          </a>
         </div>
       )}
     </div>

components/behavior/FrustrationSummaryCards.tsx

@@ -31,7 +31,7 @@ function ChangeIndicator({ change }: { change: ReturnType<typeof pctChange> }) {
           ? 'text-red-600 dark:text-red-400'
           : isDown
             ? 'text-green-600 dark:text-green-400'
-            : 'text-neutral-500 dark:text-neutral-400'
+            : 'text-neutral-400'
       }`}
     >
       {isUp ? '+' : ''}{change.value}%
@@ -71,11 +71,11 @@ export default function FrustrationSummaryCards({ data, loading }: FrustrationSu
     <div className="grid grid-cols-1 sm:grid-cols-3 gap-4 mb-8">
       {/* Rage Clicks */}
       <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6">
-        <p className="text-sm font-medium text-neutral-500 dark:text-neutral-400 mb-1">
+        <p className="text-sm font-medium text-neutral-400 mb-1">
           Rage Clicks
         </p>
         <div className="flex items-baseline gap-2">
-          <span className="text-2xl font-bold text-neutral-900 dark:text-white tabular-nums">
+          <span className="text-2xl font-bold text-white tabular-nums">
             {data.rage_clicks.toLocaleString()}
           </span>
           <ChangeIndicator change={rageChange} />
@@ -87,11 +87,11 @@ export default function FrustrationSummaryCards({ data, loading }: FrustrationSu
 
       {/* Dead Clicks */}
       <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6">
-        <p className="text-sm font-medium text-neutral-500 dark:text-neutral-400 mb-1">
+        <p className="text-sm font-medium text-neutral-400 mb-1">
           Dead Clicks
         </p>
         <div className="flex items-baseline gap-2">
-          <span className="text-2xl font-bold text-neutral-900 dark:text-white tabular-nums">
+          <span className="text-2xl font-bold text-white tabular-nums">
             {data.dead_clicks.toLocaleString()}
           </span>
           <ChangeIndicator change={deadChange} />
@@ -103,10 +103,10 @@ export default function FrustrationSummaryCards({ data, loading }: FrustrationSu
 
       {/* Total Frustration Signals */}
       <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6">
-        <p className="text-sm font-medium text-neutral-500 dark:text-neutral-400 mb-1">
+        <p className="text-sm font-medium text-neutral-400 mb-1">
           Total Signals
         </p>
-        <span className="text-2xl font-bold text-neutral-900 dark:text-white tabular-nums">
+        <span className="text-2xl font-bold text-white tabular-nums">
           {totalSignals.toLocaleString()}
         </span>
         {topPage ? (

components/behavior/FrustrationTable.tsx

@@ -53,7 +53,7 @@ function SelectorCell({ selector }: { selector: string }) {
       className="flex items-center gap-1 min-w-0 group/copy cursor-pointer"
       title={selector}
     >
-      <span className="text-sm font-mono text-neutral-900 dark:text-white truncate">
+      <span className="text-sm font-mono text-white truncate">
         {selector}
       </span>
       <span className="opacity-0 group-hover/copy:opacity-100 transition-opacity shrink-0">
@@ -145,7 +145,7 @@ export default function FrustrationTable({
       <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6 h-full flex flex-col">
         <div className="flex items-center justify-between mb-1">
           <div className="flex items-center gap-2">
-            <h3 className="text-lg font-semibold text-neutral-900 dark:text-white">
+            <h3 className="text-lg font-semibold text-white">
               {title}
             </h3>
             {showViewAll && (
@@ -159,7 +159,7 @@ export default function FrustrationTable({
             )}
           </div>
         </div>
-        <p className="text-sm text-neutral-500 dark:text-neutral-400 mb-4">
+        <p className="text-sm text-neutral-400 mb-4">
           {description}
         </p>
 
@@ -182,15 +182,18 @@ export default function FrustrationTable({
                 alt="No frustration signals"
                 className="w-44 h-auto mb-1"
               />
-              <h4 className="font-semibold text-neutral-900 dark:text-white">
+              <h4 className="font-semibold text-white">
                 No {title.toLowerCase()} detected
               </h4>
-              <p className="text-sm text-neutral-500 dark:text-neutral-400 max-w-md">
+              <p className="text-sm text-neutral-400 max-w-md">
                 Frustration tracking requires the add-on script. Add it after your core Pulse script:
               </p>
               <code className="text-xs bg-neutral-100 dark:bg-neutral-800 text-neutral-700 dark:text-neutral-300 px-3 py-2 rounded-lg font-mono break-all">
                 {'<script defer src="https://pulse.ciphera.net/script.frustration.js"></script>'}
               </code>
+              <a href="/installation" target="_blank" rel="noopener noreferrer" className="mt-1 text-sm font-medium text-brand-orange hover:underline">
+                View setup guide
+              </a>
             </div>
           )}
         </div>
@@ -214,7 +217,7 @@ export default function FrustrationTable({
               ))}
             </div>
           ) : (
-            <p className="text-sm text-neutral-500 dark:text-neutral-400 py-8 text-center">
+            <p className="text-sm text-neutral-400 py-8 text-center">
               No data available
             </p>
           )}

components/behavior/FrustrationTrend.tsx

@@ -59,7 +59,7 @@ function CustomTooltip({ active, payload }: { active?: boolean; payload?: Array<
         className="h-2.5 w-2.5 shrink-0 rounded-full"
         style={{ backgroundColor: item.fill }}
       />
-      <span className="text-neutral-500 dark:text-neutral-400">
+      <span className="text-neutral-400">
         {LABELS[item.type] ?? item.type}
       </span>
       <span className="font-mono font-medium tabular-nums text-neutral-900 dark:text-neutral-50">
@@ -93,21 +93,21 @@ export default function FrustrationTrend({ summary, loading }: FrustrationTrendP
     return (
       <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6 h-full flex flex-col">
         <div className="flex items-center justify-between mb-1">
-          <h3 className="text-lg font-semibold text-neutral-900 dark:text-white">
+          <h3 className="text-lg font-semibold text-white">
             Frustration Trend
           </h3>
         </div>
-        <p className="text-sm text-neutral-500 dark:text-neutral-400 mb-4">
+        <p className="text-sm text-neutral-400 mb-4">
           Rage vs. dead click breakdown
         </p>
         <div className="flex-1 min-h-[270px] flex flex-col items-center justify-center text-center px-6 py-8 gap-4">
           <div className="rounded-full bg-neutral-100 dark:bg-neutral-800 p-4">
-            <TrendUp className="w-8 h-8 text-neutral-500 dark:text-neutral-400" />
+            <TrendUp 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 trend data yet
           </h4>
-          <p className="text-sm text-neutral-500 dark:text-neutral-400 max-w-md">
+          <p className="text-sm text-neutral-400 max-w-md">
             Frustration trend data will appear here once rage clicks or dead clicks are detected on your site.
           </p>
         </div>
@@ -118,11 +118,11 @@ export default function FrustrationTrend({ summary, loading }: FrustrationTrendP
   return (
     <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6 h-full flex flex-col">
       <div className="flex items-center justify-between mb-1">
-        <h3 className="text-lg font-semibold text-neutral-900 dark:text-white">
+        <h3 className="text-lg font-semibold text-white">
           Frustration Trend
         </h3>
       </div>
-      <p className="text-sm text-neutral-500 dark:text-neutral-400 mb-4">
+      <p className="text-sm text-neutral-400 mb-4">
         {hasPrevious
           ? 'Rage and dead clicks split across current and previous period'
           : 'Rage vs. dead click breakdown'}