fmt

frontend/src/App.tsx

@@ -1,4 +1,5 @@
 import { lazy, Suspense, useState, useEffect, useCallback, useMemo, useRef } from 'react';
+import type { ParseKeys } from 'i18next';
 import type { ExportState } from './components/map/MapPage';
 import {
   getSeoContentPage,
@@ -277,6 +278,9 @@ export default function App() {
   const { startCheckout: startPostAuthCheckout } = useLicense();
   const [showAuthModal, setShowAuthModal] = useState(false);
   const [authModalTab, setAuthModalTab] = useState<'login' | 'register'>('login');
+  // Optional context-specific value-prop key for the auth modal (e.g. when a
+  // logged-out user taps Save/Share/Export). Null → the generic value prop.
+  const [authModalValuePropKey, setAuthModalValuePropKey] = useState<ParseKeys | null>(null);
   const [postAuthIntent, setPostAuthIntent] = useState<PostAuthIntent | null>(null);
   const postAuthCheckoutReturnPathRef = useRef<string | null>(null);
   const authCompletedRef = useRef(false);
@@ -294,13 +298,15 @@ export default function App() {
     (
       tab: 'login' | 'register',
       intent: PostAuthIntent | null = null,
-      checkoutReturnPath?: string
+      checkoutReturnPath?: string,
+      valuePropKey?: ParseKeys | null
     ) => {
       authCompletedRef.current = false;
       postAuthCheckoutReturnPathRef.current =
         intent === 'checkout' ? (checkoutReturnPath ?? currentRelativePath()) : null;
       setPostAuthIntent(intent);
       setAuthModalTab(tab);
+      setAuthModalValuePropKey(valuePropKey ?? null);
       setShowAuthModal(true);
       clearError();
     },
@@ -648,7 +654,7 @@ export default function App() {
         onPageChange={navigateTo}
         theme={theme}
         onToggleTheme={toggleTheme}
-        exportState={activePage === 'dashboard' && user ? exportState : null}
+        exportState={activePage === 'dashboard' ? exportState : null}
         dashboardParams={activePage === 'dashboard' ? dashboardParams : ''}
         dashboardActionsDisabled={activePage === 'dashboard' && !dashboardReady}
         onSaveSearch={
@@ -665,6 +671,9 @@ export default function App() {
         user={user}
         onLoginClick={() => openAuthModal('login')}
         onRegisterClick={() => openAuthModal('register')}
+        onAccountRequired={() =>
+          openAuthModal('register', null, undefined, 'auth.dashboardActionsValueProp')
+        }
         onLogout={logout}
         isMobile={isMobile}
       />
@@ -753,7 +762,6 @@ export default function App() {
             user={user}
             onLoginClick={() => openAuthModal('login')}
             onRegisterClick={() => openAuthModal('register')}
-            onCheckoutLoginClick={(returnPath) => openAuthModal('login', 'checkout', returnPath)}
             onCheckoutRegisterClick={(returnPath) =>
               openAuthModal('register', 'checkout', returnPath)
             }
@@ -782,6 +790,7 @@ export default function App() {
             error={authError}
             onClearError={clearError}
             initialTab={authModalTab}
+            valuePropKey={authModalValuePropKey ?? undefined}
           />
         )}
         {showSaveModal && (

frontend/src/components/map/Filters.tsx

@@ -871,6 +871,7 @@ export default memo(function Filters({
 
       <AddFilterPanel
         collapsed={addFilterCollapsed}
+        isLoggedIn={isLoggedIn}
         isLicensed={isLicensed}
         availableFeatures={availableFeatures}
         allFeatures={[
@@ -905,6 +906,7 @@ export default memo(function Filters({
         onClearOpenInfoFeature={onClearOpenInfoFeature}
         onAddTravelTimeEntry={handleAddTravelTimeAndScroll}
         onUpgradeClick={onUpgradeClick}
+        onRegisterClick={onLoginRequired}
       />
 
       {showPhilosophy && (

frontend/src/components/map/MapPage.tsx

@@ -109,7 +109,6 @@ export default function MapPage({
   user,
   onLoginClick,
   onRegisterClick,
-  onCheckoutLoginClick,
   onCheckoutRegisterClick,
   deferTutorial = false,
   onSaveSearch,
@@ -348,6 +347,7 @@ export default function MapPage({
     },
     [
       activeEntries,
+      effectiveFilterCap,
       fetchAiFilters,
       filters,
       filtersUnlimited,
@@ -358,16 +358,28 @@ export default function MapPage({
   );
 
   // Travel-time entries share the non-paying user's filter cap, so block adding one
-  // when the combined feature + travel count is already at the limit.
+  // when the combined feature + travel count is already at the limit — and block it
+  // outright on a shared link, where non-paying users can't add filters at all.
   const handleAddTravelTimeEntry = useCallback(
     (mode: TransportMode) => {
-      if (!filtersUnlimited && Object.keys(filters).length + entries.length >= DEMO_MAX_FILTERS) {
+      if (
+        !filtersUnlimited &&
+        (lockFilterAdds || Object.keys(filters).length + entries.length >= effectiveFilterCap)
+      ) {
         handleFilterLimitReached();
         return;
       }
       handleAddEntry(mode);
     },
-    [filtersUnlimited, filters, entries, handleAddEntry, handleFilterLimitReached]
+    [
+      filtersUnlimited,
+      lockFilterAdds,
+      effectiveFilterCap,
+      filters,
+      entries,
+      handleAddEntry,
+      handleFilterLimitReached,
+    ]
   );
 
   const handleClearAll = useCallback(() => {
@@ -691,13 +703,14 @@ export default function MapPage({
   }, [onDashboardReadyChange]);
 
   // Clear the filter-cap upsell once it's no longer relevant: the user became
-  // licensed/admin, or dropped back under the cap by removing filters. Prevents a
-  // stale flag from resurfacing the modal spuriously.
+  // licensed/admin, or dropped back under the cap by removing filters. On a shared
+  // link adds are blocked regardless of count, so don't auto-clear there — the user
+  // dismisses it themselves. Prevents a stale flag from resurfacing spuriously.
   useEffect(() => {
-    if (filtersUnlimited || Object.keys(filters).length < DEMO_MAX_FILTERS) {
+    if (filtersUnlimited || (!lockFilterAdds && Object.keys(filters).length < effectiveFilterCap)) {
       setFilterLimitHit(false);
     }
-  }, [filtersUnlimited, filters]);
+  }, [filtersUnlimited, lockFilterAdds, effectiveFilterCap, filters]);
 
   const handleUpgradeClick = useCallback(() => {
     onNavigateTo('pricing');
@@ -1021,17 +1034,20 @@ export default function MapPage({
       </div>
     ) : null;
 
-  // The upgrade modal is shown when a non-paying user hits the filter cap.
-  // Dismissing it just closes the modal (the filters they have stay applied).
+  // The upgrade modal is shown when a non-paying user hits the filter cap (or tries
+  // to add filters on a shared link). Dismissing it just closes the modal (the
+  // filters they have stay applied). Anonymous users are nudged to register for free
+  // first (a higher filter allowance + save/share/export); paying is the way to
+  // unlimited. Registered users see the lifetime upgrade directly.
   const showFilterUpgradeModal = filterLimitHit && !filtersUnlimited;
   const upgradeModal = showFilterUpgradeModal ? (
     <Suspense fallback={null}>
       <UpgradeModal
-        isLoggedIn={!!user}
-        onLoginClick={() =>
-          onCheckoutLoginClick ? onCheckoutLoginClick(checkoutReturnPath) : onLoginClick()
-        }
-        onRegisterClick={() =>
+        isLoggedIn={isLoggedIn}
+        reason={upgradeReason}
+        onLoginClick={onLoginClick}
+        onRegisterClick={onRegisterClick}
+        onRegisterAndUpgrade={() =>
           onCheckoutRegisterClick ? onCheckoutRegisterClick(checkoutReturnPath) : onRegisterClick()
         }
         onStartCheckout={() => license.startCheckout(checkoutReturnPath)}

frontend/src/components/map/filters/AddFilterPanel.tsx

@@ -33,6 +33,7 @@ import {
 
 interface AddFilterPanelProps {
   collapsed: boolean;
+  isLoggedIn: boolean;
   isLicensed: boolean;
   availableFeatures: FeatureMeta[];
   allFeatures: FeatureMeta[];
@@ -54,10 +55,13 @@ interface AddFilterPanelProps {
   onClearOpenInfoFeature?: () => void;
   onAddTravelTimeEntry: (mode: TransportMode) => void;
   onUpgradeClick?: () => void;
+  /** Anonymous-only: open the register prompt from the create-account nag. */
+  onRegisterClick?: () => void;
 }
 
 export function AddFilterPanel({
   collapsed,
+  isLoggedIn,
   isLicensed,
   availableFeatures,
   allFeatures,
@@ -79,6 +83,7 @@ export function AddFilterPanel({
   onClearOpenInfoFeature,
   onAddTravelTimeEntry,
   onUpgradeClick,
+  onRegisterClick,
 }: AddFilterPanelProps) {
   const { t } = useTranslation();
   const { setContainer, registerGroup, onToggle: revealGroupOnToggle } = useRevealOnExpand();
@@ -182,16 +187,16 @@ export function AddFilterPanel({
           {!isLicensed && (
             <div className="mt-auto shrink-0 flex flex-col items-center px-5 pt-4 pb-0 border-t border-warm-200 dark:border-warm-700">
               <p className="text-sm text-warm-600 dark:text-warm-400 text-center leading-relaxed mb-1">
-                {t('filters.upgradePrompt')}
+                {isLoggedIn ? t('filters.upgradePrompt') : t('filters.registerPrompt')}
               </p>
               <p className="text-xs text-warm-400 dark:text-warm-500 text-center mb-4">
-                {t('filters.oneTimeLifetime')}
+                {isLoggedIn ? t('filters.oneTimeLifetime') : t('filters.registerSubPrompt')}
               </p>
               <button
-                onClick={onUpgradeClick}
+                onClick={isLoggedIn ? onUpgradeClick : onRegisterClick}
                 className="px-5 py-2.5 rounded-lg bg-gradient-to-r from-teal-500 to-teal-600 hover:from-teal-600 hover:to-teal-700 text-white font-medium text-sm shadow-sm hover:shadow-md"
               >
-                {t('filters.upgradeToFullMap')}
+                {isLoggedIn ? t('filters.upgradeToFullMap') : t('filters.registerCta')}
               </button>
               <svg
                 viewBox="0 120 1600 230"

frontend/src/components/map/map-page/types.ts

@@ -49,7 +49,6 @@ export interface MapPageProps {
   user?: { id: string; subscription: string; isAdmin?: boolean; canSeeListings?: boolean } | null;
   onLoginClick: () => void;
   onRegisterClick: () => void;
-  onCheckoutLoginClick?: (returnPath?: string) => void;
   onCheckoutRegisterClick?: (returnPath?: string) => void;
   deferTutorial?: boolean;
   onSaveSearch?: (name: string, paramsOverride?: string) => Promise<void>;

frontend/src/components/ui/AuthModal.tsx

@@ -1,5 +1,6 @@
 import { useState, useCallback, useEffect, useId } from 'react';
 import { Trans, useTranslation } from 'react-i18next';
+import type { ParseKeys } from 'i18next';
 import { CloseIcon } from './icons/CloseIcon';
 import { GoogleIcon } from './icons/GoogleIcon';
 import { trackEvent } from '../../lib/analytics';
@@ -18,6 +19,7 @@ export default function AuthModal({
   error,
   onClearError,
   initialTab = 'login',
+  valuePropKey,
 }: {
   onClose: () => void;
   onAuthenticated?: () => void;
@@ -29,6 +31,9 @@ export default function AuthModal({
   error: string | null;
   onClearError: () => void;
   initialTab?: 'login' | 'register';
+  /** Translation key for the value-prop line, e.g. a context-specific nudge. Falls
+   *  back to the generic `auth.valueProp`. */
+  valuePropKey?: ParseKeys;
 }) {
   const { t } = useTranslation();
   const [view, setView] = useState<View>(initialTab);
@@ -166,7 +171,7 @@ export default function AuthModal({
           {/* Value prop */}
           {view !== 'forgot' && (
             <p className="text-xs text-warm-500 dark:text-warm-400 text-center">
-              {t('auth.valueProp')}
+              {t(valuePropKey ?? 'auth.valueProp')}
             </p>
           )}
 

frontend/src/components/ui/Header.tsx

@@ -91,6 +91,7 @@ export default function Header({
   user,
   onLoginClick,
   onRegisterClick,
+  onAccountRequired,
   onLogout,
   isMobile,
 }: {
@@ -110,6 +111,8 @@ export default function Header({
   user: AuthUser | null;
   onLoginClick: () => void;
   onRegisterClick: () => void;
+  /** Logged-out click on a dashboard action (save/share/export) → register prompt. */
+  onAccountRequired: () => void;
   onLogout: () => void;
   isMobile: boolean;
 }) {
@@ -122,7 +125,10 @@ export default function Header({
     () => window.matchMedia(DASHBOARD_TABLET_SIDEBAR_QUERY).matches
   );
   const useSidebarNav = isMobile || (activePage === 'dashboard' && isDashboardTabletSidebarWidth);
-  const dashboardActionsBlocked = activePage === 'dashboard' && (!user || dashboardActionsDisabled);
+  // Save/Share/Export are shown to everyone on the dashboard; a logged-out click
+  // opens the register prompt (see onAccountRequired) instead of acting. "Blocked"
+  // only applies to logged-in users while the dashboard isn't ready yet.
+  const dashboardActionsBlocked = activePage === 'dashboard' && !!user && dashboardActionsDisabled;
 
   useEffect(() => {
     const mql = window.matchMedia(DASHBOARD_TABLET_SIDEBAR_QUERY);
@@ -281,12 +287,13 @@ export default function Header({
 
         {/* Right side */}
         <div className="ml-auto flex shrink-0 items-center gap-2">
-          {/* Desktop-only dashboard actions */}
-          {!useSidebarNav && activePage === 'dashboard' && user && (
+          {/* Desktop-only dashboard actions — shown to everyone; a logged-out click
+              opens the register prompt instead of acting. */}
+          {!useSidebarNav && activePage === 'dashboard' && (
             <>
               <button
-                onClick={handleShare}
-                disabled={sharing || dashboardActionsBlocked}
+                onClick={user ? handleShare : onAccountRequired}
+                disabled={!!user && (sharing || dashboardActionsBlocked)}
                 className="flex cursor-pointer items-center gap-1.5 px-3 py-1.5 rounded bg-navy-800 hover:bg-navy-700 transition-colors text-sm disabled:cursor-not-allowed disabled:opacity-50"
               >
                 {sharing ? (
@@ -308,8 +315,8 @@ export default function Header({
               </button>
               {exportState && (
                 <button
-                  onClick={() => setExportMenuOpen(true)}
-                  disabled={exportState.exporting || dashboardActionsBlocked}
+                  onClick={user ? () => setExportMenuOpen(true) : onAccountRequired}
+                  disabled={!!user && (exportState.exporting || dashboardActionsBlocked)}
                   className="flex cursor-pointer items-center gap-1.5 px-3 py-1.5 rounded bg-navy-800 hover:bg-navy-700 transition-colors text-sm disabled:cursor-not-allowed disabled:opacity-50"
                   title={t('header.exportToExcel')}
                 >
@@ -317,10 +324,10 @@ export default function Header({
                   {exportState.exporting ? t('header.exporting') : t('header.exportLabel')}
                 </button>
               )}
-              {onSaveSearch && !editingSearch && (
+              {!editingSearch && (
                 <button
-                  onClick={onSaveSearch}
-                  disabled={savingSearch || dashboardActionsBlocked}
+                  onClick={user ? () => onSaveSearch?.() : onAccountRequired}
+                  disabled={!!user && (savingSearch || dashboardActionsBlocked)}
                   className="flex cursor-pointer items-center gap-1.5 px-3 py-1.5 rounded bg-navy-800 hover:bg-navy-700 transition-colors text-sm disabled:cursor-not-allowed disabled:opacity-50"
                 >
                   {savingSearch ? (
@@ -431,6 +438,7 @@ export default function Header({
           user={user}
           onLoginClick={onLoginClick}
           onRegisterClick={onRegisterClick}
+          onAccountRequired={onAccountRequired}
           onLogout={onLogout}
           onClose={() => setMenuOpen(false)}
           onShare={handleShare}

frontend/src/components/ui/MobileMenu.tsx

@@ -27,6 +27,8 @@ interface MobileMenuProps {
   user: AuthUser | null;
   onLoginClick: () => void;
   onRegisterClick: () => void;
+  /** Logged-out click on a dashboard action (save/share/export) → register prompt. */
+  onAccountRequired: () => void;
   onLogout: () => void;
   onClose: () => void;
   onShare: () => void;
@@ -49,6 +51,7 @@ export default function MobileMenu({
   user,
   onLoginClick,
   onRegisterClick,
+  onAccountRequired,
   onLogout,
   onClose,
   onShare,
@@ -103,15 +106,17 @@ export default function MobileMenu({
     </a>
   );
 
-  const dashboardActions = activePage === 'dashboard' && user && (
+  // Shown to everyone on the dashboard; a logged-out tap opens the register prompt.
+  const dashboardActions = activePage === 'dashboard' && (
     <div className="px-2 py-2 border-b border-navy-700">
       <div className="grid grid-cols-2 gap-2">
         <button
           onClick={() => {
-            onShare();
+            if (user) onShare();
+            else onAccountRequired();
             onClose();
           }}
-          disabled={sharing || dashboardActionsDisabled}
+          disabled={!!user && (sharing || dashboardActionsDisabled)}
           className={dashboardActionClass}
         >
           {sharing ? (
@@ -127,22 +132,24 @@ export default function MobileMenu({
           <button
             onClick={() => {
               onClose();
-              onOpenExportMenu();
+              if (user) onOpenExportMenu();
+              else onAccountRequired();
             }}
             className={dashboardActionClass}
-            disabled={exportState.exporting || dashboardActionsDisabled}
+            disabled={!!user && (exportState.exporting || dashboardActionsDisabled)}
           >
             <DownloadIcon className="w-4 h-4" />
             {exportState.exporting ? t('header.exporting') : t('header.exportLabel')}
           </button>
         )}
-        {onSaveSearch && (
+        {(onSaveSearch || !user) && (
           <button
             onClick={() => {
-              onSaveSearch();
+              if (user) onSaveSearch?.();
+              else onAccountRequired();
               onClose();
             }}
-            disabled={savingSearch || dashboardActionsDisabled}
+            disabled={!!user && (savingSearch || dashboardActionsDisabled)}
             className={dashboardActionClass}
           >
             {savingSearch ? (

frontend/src/components/ui/UpgradeModal.tsx

@@ -7,17 +7,27 @@ import { useModalA11y } from '../../hooks/useModalA11y';
 
 interface UpgradeModalProps {
   isLoggedIn: boolean;
+  /** Why the modal opened: a plain filter-cap hit, or an attempt to add filters on
+   *  a shared link. Only changes the wording. */
+  reason?: 'filters' | 'shared';
+  /** Anonymous only: log into an existing account. */
   onLoginClick: () => void;
+  /** Anonymous only: create a free account (the preferred, no-cost next step). */
   onRegisterClick: () => void;
+  /** Anonymous only: register and go straight to lifetime checkout. */
+  onRegisterAndUpgrade: () => void;
+  /** Logged-in only: start lifetime checkout for unlimited filters. */
   onStartCheckout: () => Promise<void>;
-  /** Dismiss the modal and keep exploring with the free filter allowance. */
+  /** Dismiss the modal and keep exploring with the current filter allowance. */
   onClose: () => void;
 }
 
 export default function UpgradeModal({
   isLoggedIn,
+  reason = 'filters',
   onLoginClick,
   onRegisterClick,
+  onRegisterAndUpgrade,
   onStartCheckout,
   onClose,
 }: UpgradeModalProps) {
@@ -52,6 +62,18 @@ export default function UpgradeModal({
         : `\u00A3${pricePence / 100}`;
   const isFree = pricePence === 0;
 
+  // Registered users see the lifetime upsell directly; anonymous users are nudged to
+  // create a free account first (more filters + save/share/export), with the paid
+  // tier offered as the route to unlimited.
+  const title = isLoggedIn ? t('upgrade.title') : t('upgrade.titleRegister');
+  const description = isLoggedIn
+    ? reason === 'shared'
+      ? t('upgrade.descriptionSharedUpgrade')
+      : t('upgrade.description')
+    : reason === 'shared'
+      ? t('upgrade.descriptionSharedRegister')
+      : t('upgrade.descriptionRegister');
+
   const handleUpgrade = async () => {
     setLoading(true);
     setError(null);
@@ -90,55 +112,70 @@ export default function UpgradeModal({
         {/* Header */}
         <div className="bg-gradient-to-br from-navy-950 to-teal-900 px-6 py-8 text-center">
           <h2 id="upgrade-modal-title" className="text-2xl font-bold text-white mb-2">
-            {t('upgrade.title')}
+            {title}
           </h2>
-          <p className="text-warm-300 text-sm">{t('upgrade.description')}</p>
+          <p className="text-warm-300 text-sm">{description}</p>
         </div>
 
         {/* Body */}
         <div className="px-6 py-6">
-          <div className="flex items-baseline justify-center gap-1 mb-4">
-            <span className="text-4xl font-extrabold text-navy-950 dark:text-warm-100">
-              {priceLabel}
-            </span>
-            {!isFree && (
-              <span className="text-warm-500 dark:text-warm-400 text-lg">
-                {t('pricingPage.lifetime')}
-              </span>
-            )}
-          </div>
-          <p className="text-center text-sm text-warm-500 dark:text-warm-400 mb-6">
-            {isFree ? t('upgrade.freeForEarly') : t('upgrade.oneTimePayment')}
-          </p>
-
           {isLoggedIn ? (
-            <button
-              onClick={handleUpgrade}
-              disabled={loading}
-              className="w-full px-6 py-3 border border-[#d27a11] bg-[#f09a22] text-navy-950 rounded-lg font-semibold hover:bg-[#df8614] transition-colors text-lg shadow-lg shadow-[#7a3905]/25 disabled:opacity-50 disabled:cursor-wait flex items-center justify-center gap-2"
-            >
-              {loading && <SpinnerIcon className="w-5 h-5 animate-spin" />}
-              {loading
-                ? t('upgrade.redirecting')
-                : isFree
-                  ? t('upgrade.claimFreeAccess')
-                  : t('upgrade.upgradeFor', { price: priceLabel })}
-            </button>
+            // Registered free user: pay to unlock unlimited filters.
+            <>
+              <div className="flex items-baseline justify-center gap-1 mb-4">
+                <span className="text-4xl font-extrabold text-navy-950 dark:text-warm-100">
+                  {priceLabel}
+                </span>
+                {!isFree && (
+                  <span className="text-warm-500 dark:text-warm-400 text-lg">
+                    {t('pricingPage.lifetime')}
+                  </span>
+                )}
+              </div>
+              <p className="text-center text-sm text-warm-500 dark:text-warm-400 mb-6">
+                {isFree ? t('upgrade.freeForEarly') : t('upgrade.oneTimePayment')}
+              </p>
+              <button
+                onClick={handleUpgrade}
+                disabled={loading}
+                className="w-full px-6 py-3 border border-[#d27a11] bg-[#f09a22] text-navy-950 rounded-lg font-semibold hover:bg-[#df8614] transition-colors text-lg shadow-lg shadow-[#7a3905]/25 disabled:opacity-50 disabled:cursor-wait flex items-center justify-center gap-2"
+              >
+                {loading && <SpinnerIcon className="w-5 h-5 animate-spin" />}
+                {loading
+                  ? t('upgrade.redirecting')
+                  : isFree
+                    ? t('upgrade.claimFreeAccess')
+                    : t('upgrade.upgradeFor', { price: priceLabel })}
+              </button>
+            </>
           ) : (
-            <div className="flex flex-col gap-3">
+            // Anonymous: create a free account first (more filters + save/share/export),
+            // with the paid lifetime tier offered below as the route to unlimited.
+            <>
               <button
                 onClick={onRegisterClick}
                 className="w-full px-6 py-3 border border-[#d27a11] bg-[#f09a22] text-navy-950 rounded-lg font-semibold hover:bg-[#df8614] transition-colors text-lg shadow-lg shadow-[#7a3905]/25"
               >
-                {t('upgrade.registerAndUpgrade')}
+                {t('upgrade.registerFree')}
               </button>
               <button
                 onClick={onLoginClick}
-                className="w-full px-4 py-2 text-sm text-teal-600 dark:text-teal-400 hover:text-teal-800 dark:hover:text-teal-300"
+                className="w-full px-4 py-2 mt-2 text-sm text-teal-600 dark:text-teal-400 hover:text-teal-800 dark:hover:text-teal-300"
               >
                 {t('upgrade.alreadyHaveAccount')}
               </button>
-            </div>
+              <div className="mt-5 pt-4 border-t border-warm-200 dark:border-warm-700 text-center">
+                <p className="text-sm text-warm-500 dark:text-warm-400 mb-2">
+                  {t('upgrade.lifetimeUpsell')}
+                </p>
+                <button
+                  onClick={onRegisterAndUpgrade}
+                  className="text-sm font-semibold text-[#c8780f] hover:text-[#a86409] dark:text-[#f09a22] dark:hover:text-[#df8614]"
+                >
+                  {t('upgrade.goLifetime', { price: priceLabel })}
+                </button>
+              </div>
+            </>
           )}
 
           {error && (

frontend/src/hooks/useFilters.test.ts

@@ -228,6 +228,43 @@ describe('useFilters', () => {
     expect(Object.keys(result.current.filters)).toHaveLength(2);
   });
 
+  it('blocks adding new filters when lockAdds is set (shared link), but allows replacing existing ones', () => {
+    const sixFeatures: FeatureMeta[] = ['a', 'b', 'c', 'd', 'e', 'f'].map((name) => ({
+      name,
+      type: 'numeric',
+      min: 0,
+      max: 100,
+    }));
+    const onFilterLimitReached = vi.fn();
+
+    // A non-paying user on a shared link: still under the cap (5), but adds are
+    // locked. They can adjust the shared filter ('a') but not add a new one.
+    const { result } = renderHook(() =>
+      useFilters({
+        initialFilters: { a: [0, 100] },
+        features: sixFeatures,
+        filterLimit: 5,
+        lockAdds: true,
+        onFilterLimitReached,
+      })
+    );
+
+    // Adding a brand-new filter is blocked and reported, even though count < cap.
+    act(() => {
+      result.current.handleAddFilter('b');
+    });
+    expect(Object.keys(result.current.filters)).toHaveLength(1);
+    expect(result.current.filters.b).toBeUndefined();
+    expect(onFilterLimitReached).toHaveBeenCalledTimes(1);
+
+    // Re-applying the existing filter replaces it (no new key) and is allowed.
+    act(() => {
+      result.current.handleAddFilter('a');
+    });
+    expect(Object.keys(result.current.filters)).toHaveLength(1);
+    expect(onFilterLimitReached).toHaveBeenCalledTimes(1);
+  });
+
   it('does not cap filters when filterLimit is null (licensed users)', () => {
     const sixFeatures: FeatureMeta[] = ['a', 'b', 'c', 'd', 'e', 'f'].map((name) => ({
       name,

frontend/src/i18n/locales/de.ts

@@ -611,6 +611,8 @@ const de: Translations = {
     createAccount: 'Konto erstellen',
     resetPassword: 'Passwort zurücksetzen',
     valueProp: 'Speichere Suchen, merke Immobilien und erstelle eine Shortlist passender Gebiete.',
+    dashboardActionsValueProp:
+      'Erstelle ein kostenloses Konto, um deine Suchen zu speichern, zu teilen und zu exportieren — kostenlos, keine Kreditkarte erforderlich.',
     continueWithGoogle: 'Weiter mit Google',
     email: 'E-Mail',
     emailPlaceholder: 'name@beispiel.de',
@@ -634,7 +636,17 @@ const de: Translations = {
   upgrade: {
     title: 'Unbegrenzte Filter freischalten',
     description:
-      'Kostenlose Konten können bis zu 3 Filter gleichzeitig kombinieren. Erhalte lebenslangen Zugang, um unbegrenzt Filter über jeden Postcode und jede Nachbarschaft in England hinweg zu kombinieren. Einmal zahlen, für immer nutzen.',
+      'Du hast alle 5 Filter deines kostenlosen Kontos genutzt. Erhalte lebenslangen Zugang, um unbegrenzt Filter über jeden Postcode und jede Nachbarschaft in England hinweg zu kombinieren. Einmal zahlen, für immer nutzen.',
+    descriptionSharedUpgrade:
+      'Um einer geteilten Suche weitere Filter hinzuzufügen, ist ein lebenslanger Zugang erforderlich — schalte unbegrenzte Filter für jeden Postcode in England frei.',
+    titleRegister: 'Kostenloses Konto erstellen',
+    descriptionRegister:
+      'Kostenlose Konten schalten bis zu 5 Filter sowie Speichern, Teilen und Exportieren frei — keine Kreditkarte erforderlich. Willst du unbegrenzte Filter für ganz England? Wähle den lebenslangen Zugang.',
+    descriptionSharedRegister:
+      'Das ist eine geteilte Suche. Erstelle ein kostenloses Konto, um deine eigene mit bis zu 5 Filtern zu erstellen und zu speichern, teilen & exportieren — oder wähle den lebenslangen Zugang für unbegrenzte Filter.',
+    registerFree: 'Kostenloses Konto erstellen',
+    lifetimeUpsell: 'Willst du unbegrenzte Filter?',
+    goLifetime: 'Lebenslangen Zugang erhalten — {{price}}',
     free: 'Kostenlos',
     freeForEarly: 'Kostenlos für Frühnutzer. Keine Kreditkarte erforderlich.',
     oneTimePayment: 'Einmalzahlung. Lebenslanger Zugang.',
@@ -643,7 +655,7 @@ const de: Translations = {
     upgradeFor: 'Upgrade für {{price}}',
     registerAndUpgrade: 'Registrieren & upgraden',
     alreadyHaveAccount: 'Bereits ein Konto? Anmelden',
-    continueFree: 'Mit 3 Filtern fortfahren',
+    continueFree: 'Erstmal weiter erkunden',
     checkoutFailed: 'Bezahlvorgang fehlgeschlagen',
   },
 
@@ -682,7 +694,12 @@ const de: Translations = {
     addFiltersHint:
       'Füge unten Filter hinzu, um die Karte auf Gebiete einzugrenzen, die zu deinen Kriterien passen',
     upgradePrompt:
-      'Finde passende Postcodes mit Kriminalität, Schulen, Lärm, Breitband, Preisen und über 40 kombinierbaren Filtern in ganz England.',
+      'Wähle den lebenslangen Zugang, um unbegrenzt Filter über jeden Postcode in England hinweg zu kombinieren.',
+    registerPrompt:
+      'Erstelle ein kostenloses Konto, um bis zu 5 Filter zu kombinieren und deine Suchen zu speichern, zu teilen & zu exportieren.',
+    registerSubPrompt:
+      'Kostenlos — keine Kreditkarte erforderlich. Unbegrenzte Filter mit lebenslangem Zugang.',
+    registerCta: 'Kostenloses Konto erstellen',
     oneTimeLifetime: 'Einmalzahlung, lebenslanger Zugang.',
     upgradeToFullMap: 'Auf die vollständige Karte upgraden',
     chooseFilters:

frontend/src/i18n/locales/en.ts

@@ -599,6 +599,8 @@ const en = {
     createAccount: 'Create account',
     resetPassword: 'Reset password',
     valueProp: 'Save searches, bookmark properties, and build a shortlist of areas that fit.',
+    dashboardActionsValueProp:
+      'Create a free account to save, share and export your searches — free, no card needed.',
     continueWithGoogle: 'Continue with Google',
     email: 'Email',
     emailPlaceholder: 'you@example.com',
@@ -620,9 +622,21 @@ const en = {
 
   // ── Upgrade Modal ──────────────────────────────────
   upgrade: {
+    // Registered (logged-in, non-paying) users — the lifetime upsell.
     title: 'Unlock unlimited filters',
     description:
-      'Free accounts can combine up to 3 filters at a time. Get lifetime access to stack unlimited filters across every postcode and neighbourhood in England. One payment, forever.',
+      "You've used all 5 filters on your free account. Get lifetime access to stack unlimited filters across every postcode and neighbourhood in England. One payment, forever.",
+    descriptionSharedUpgrade:
+      'Adding more filters to a shared search needs lifetime access — unlock unlimited filters across every postcode in England.',
+    // Anonymous users — create a free account first.
+    titleRegister: 'Create a free account',
+    descriptionRegister:
+      'Free accounts unlock up to 5 filters plus save, share and export — no card needed. Want unlimited filters across all of England? Go lifetime.',
+    descriptionSharedRegister:
+      'This is a shared search. Create a free account to build your own with up to 5 filters and save, share & export — or go lifetime for unlimited.',
+    registerFree: 'Create free account',
+    lifetimeUpsell: 'Want unlimited filters?',
+    goLifetime: 'Get lifetime access — {{price}}',
     free: 'Free',
     freeForEarly: 'Free for early adopters. No credit card required.',
     oneTimePayment: 'One-time payment. Lifetime access.',
@@ -631,7 +645,7 @@ const en = {
     upgradeFor: 'Upgrade for {{price}}',
     registerAndUpgrade: 'Register & Upgrade',
     alreadyHaveAccount: 'Already have an account? Log in',
-    continueFree: 'Continue with 3 filters',
+    continueFree: 'Keep exploring for now',
     checkoutFailed: 'Checkout failed',
   },
 
@@ -668,10 +682,13 @@ const en = {
     addFilter: 'Add filters',
     findingPerfectPostcode: 'Finding the Perfect Postcode',
     addFiltersHint: 'Add filters below to narrow the map to areas that match your criteria',
-    upgradePrompt:
-      'Find matching postcodes using crime, schools, noise, broadband, prices, and 40+ combinable filters across England.',
+    upgradePrompt: 'Go lifetime to stack unlimited filters across every postcode in England.',
     oneTimeLifetime: 'One-time payment, lifetime access.',
     upgradeToFullMap: 'Upgrade to full map',
+    registerPrompt:
+      'Create a free account to combine up to 5 filters and save, share & export your searches.',
+    registerSubPrompt: 'Free — no card needed. Unlimited filters with lifetime access.',
+    registerCta: 'Create free account',
     chooseFilters: 'Click Add to filter. The small buttons show data details or colour the map.',
     searchFeatures: 'Search features...',
     noMatchingFeatures: 'No matching features',

frontend/src/i18n/locales/fr.ts

@@ -624,6 +624,8 @@ const fr: Translations = {
     resetPassword: 'Réinitialiser le mot de passe',
     valueProp:
       'Enregistrez vos recherches, ajoutez des biens en favoris et créez une sélection de secteurs adaptés à vos critères.',
+    dashboardActionsValueProp:
+      'Créez un compte gratuit pour enregistrer, partager et exporter vos recherches — gratuit, sans carte bancaire.',
     continueWithGoogle: 'Continuer avec Google',
     email: 'E-mail',
     emailPlaceholder: 'vous@exemple.com',
@@ -647,7 +649,17 @@ const fr: Translations = {
   upgrade: {
     title: 'Débloquez les filtres illimités',
     description:
-      'Les comptes gratuits peuvent combiner jusqu’à 3 filtres à la fois. Obtenez un accès à vie pour superposer un nombre illimité de filtres sur tous les codes postaux et tous les quartiers d’Angleterre. Un seul paiement, pour toujours.',
+      'Vous avez utilisé les 5 filtres de votre compte gratuit. Obtenez un accès à vie pour superposer un nombre illimité de filtres sur chaque code postal et quartier d’Angleterre. Un seul paiement, pour toujours.',
+    descriptionSharedUpgrade:
+      'Ajouter des filtres supplémentaires à une recherche partagée nécessite un accès à vie — débloquez des filtres illimités sur chaque code postal d’Angleterre.',
+    titleRegister: 'Créer un compte gratuit',
+    descriptionRegister:
+      'Les comptes gratuits débloquent jusqu’à 5 filtres ainsi que la sauvegarde, le partage et l’export — sans carte bancaire. Des filtres illimités dans toute l’Angleterre ? Passez à l’accès à vie.',
+    descriptionSharedRegister:
+      'Il s’agit d’une recherche partagée. Créez un compte gratuit pour construire la vôtre avec jusqu’à 5 filtres et enregistrer, partager et exporter — ou passez à l’accès à vie pour des filtres illimités.',
+    registerFree: 'Créer un compte gratuit',
+    lifetimeUpsell: 'Des filtres illimités ?',
+    goLifetime: 'Obtenir l’accès à vie — {{price}}',
     free: 'Gratuit',
     freeForEarly: 'Gratuit pour les premiers utilisateurs. Aucune carte bancaire requise.',
     oneTimePayment: 'Paiement unique. Accès à vie.',
@@ -656,7 +668,7 @@ const fr: Translations = {
     upgradeFor: 'Passer à la version complète pour {{price}}',
     registerAndUpgrade: 'S’inscrire et passer à la version complète',
     alreadyHaveAccount: 'Vous avez déjà un compte ? Connectez-vous',
-    continueFree: 'Continuer avec 3 filtres',
+    continueFree: 'Continuer à explorer pour l’instant',
     checkoutFailed: 'Le paiement a échoué',
   },
 
@@ -696,9 +708,13 @@ const fr: Translations = {
     addFiltersHint:
       'Ajoutez des filtres ci-dessous pour limiter la carte aux secteurs adaptés à vos critères',
     upgradePrompt:
-      'Trouvez les codes postaux compatibles grâce aux filtres de criminalité, d’écoles, de bruit, de haut débit, de prix et plus de 40 filtres combinables dans toute l’Angleterre.',
+      'Passez à l’accès à vie pour superposer un nombre illimité de filtres sur chaque code postal d’Angleterre.',
     oneTimeLifetime: 'Paiement unique, accès à vie.',
     upgradeToFullMap: 'Passer à la carte complète',
+    registerPrompt:
+      'Créez un compte gratuit pour combiner jusqu’à 5 filtres et enregistrer, partager et exporter vos recherches.',
+    registerSubPrompt: 'Gratuit — sans carte bancaire. Filtres illimités avec l’accès à vie.',
+    registerCta: 'Créer un compte gratuit',
     chooseFilters:
       'Cliquez sur Ajouter pour filtrer. Les petits boutons affichent les détails des données ou colorent la carte.',
     searchFeatures: 'Rechercher des critères...',

frontend/src/i18n/locales/hi.ts

@@ -597,6 +597,8 @@ const hi: Translations = {
     resetPassword: 'पासवर्ड रीसेट करें',
     valueProp:
       'खोजें सहेजें, संपत्तियों को बुकमार्क करें और अपनी जरूरतों से मेल खाने वाले क्षेत्रों की शॉर्टलिस्ट बनाएं.',
+    dashboardActionsValueProp:
+      'अपनी खोजें सहेजने, साझा करने और export करने के लिए मुफ्त खाता बनाएं — मुफ्त, कार्ड की जरूरत नहीं.',
     continueWithGoogle: 'Google से जारी रखें',
     email: 'ईमेल',
     emailPlaceholder: 'you@example.com',
@@ -619,7 +621,17 @@ const hi: Translations = {
   upgrade: {
     title: 'असीमित फ़िल्टर अनलॉक करें',
     description:
-      'मुफ्त खाते एक बार में 3 फ़िल्टर तक जोड़ सकते हैं. इंग्लैंड के हर पोस्टकोड और पड़ोस में असीमित फ़िल्टर लगाने के लिए आजीवन पहुँच पाएं. एक भुगतान, हमेशा के लिए.',
+      'आपने अपने मुफ्त खाते के सभी 5 फ़िल्टर इस्तेमाल कर लिए हैं. इंग्लैंड के हर पोस्टकोड और पड़ोस में असीमित फ़िल्टर लगाने के लिए आजीवन पहुँच पाएं. एक भुगतान, हमेशा के लिए.',
+    descriptionSharedUpgrade:
+      'साझा खोज में और फ़िल्टर जोड़ने के लिए आजीवन पहुँच चाहिए — इंग्लैंड के हर पोस्टकोड में असीमित फ़िल्टर अनलॉक करें.',
+    titleRegister: 'मुफ्त खाता बनाएं',
+    descriptionRegister:
+      'मुफ्त खाते में 5 फ़िल्टर के साथ-साथ सहेजें, साझा करें और export करें — कार्ड की जरूरत नहीं. पूरे इंग्लैंड में असीमित फ़िल्टर चाहिए? आजीवन पहुँच लें.',
+    descriptionSharedRegister:
+      'यह एक साझा खोज है. अपनी खुद की 5 फ़िल्टर तक की खोज बनाने और सहेजने, साझा करने व export करने के लिए मुफ्त खाता बनाएं — या असीमित के लिए आजीवन पहुँच लें.',
+    registerFree: 'मुफ्त खाता बनाएं',
+    lifetimeUpsell: 'असीमित फ़िल्टर चाहिए?',
+    goLifetime: 'आजीवन पहुँच पाएं — {{price}}',
     free: 'मुफ्त',
     freeForEarly: 'शुरुआती उपयोगकर्ताओं के लिए मुफ्त. क्रेडिट कार्ड की जरूरत नहीं.',
     oneTimePayment: 'एक बार भुगतान. आजीवन पहुँच.',
@@ -628,7 +640,7 @@ const hi: Translations = {
     upgradeFor: '{{price}} में अपग्रेड करें',
     registerAndUpgrade: 'पंजीकरण करें और अपग्रेड करें',
     alreadyHaveAccount: 'पहले से खाता है? लॉग इन करें',
-    continueFree: '3 फ़िल्टर के साथ जारी रखें',
+    continueFree: 'अभी के लिए खोज जारी रखें',
     checkoutFailed: 'चेकआउट विफल रहा',
   },
 
@@ -662,10 +674,13 @@ const hi: Translations = {
     addFilter: 'फ़िल्टर जोड़ें',
     findingPerfectPostcode: 'Perfect Postcode खोजा जा रहा है',
     addFiltersHint: 'अपनी शर्तों से मेल खाने वाले क्षेत्र पाने के लिए नीचे फ़िल्टर जोड़ें',
-    upgradePrompt:
-      'इंग्लैंड भर में अपराध, स्कूल, शोर, ब्रॉडबैंड, कीमतें और 40+ संयोजित फ़िल्टर से मेल खाने वाले पोस्टकोड खोजें.',
+    upgradePrompt: 'इंग्लैंड के हर पोस्टकोड में असीमित फ़िल्टर लगाने के लिए आजीवन पहुँच लें.',
     oneTimeLifetime: 'एक बार भुगतान, आजीवन पहुँच.',
     upgradeToFullMap: 'पूरे मानचित्र पर अपग्रेड करें',
+    registerPrompt:
+      '5 फ़िल्टर तक जोड़ने और अपनी खोजें सहेजने, साझा करने व export करने के लिए मुफ्त खाता बनाएं.',
+    registerSubPrompt: 'मुफ्त — कार्ड की जरूरत नहीं. आजीवन पहुँच के साथ असीमित फ़िल्टर.',
+    registerCta: 'मुफ्त खाता बनाएं',
     chooseFilters:
       'फ़िल्टर लगाने के लिए जोड़ें पर क्लिक करें. छोटे बटन डेटा विवरण दिखाते हैं या मानचित्र को रंगते हैं.',
     searchFeatures: 'सुविधाएं खोजें...',

frontend/src/i18n/locales/hu.ts

@@ -615,6 +615,8 @@ const hu: Translations = {
     resetPassword: 'Jelszó visszaállítása',
     valueProp:
       'Mentsd el a kereséseidet, jelöld meg az ingatlanokat, és állíts össze egy listát a megfelelő területekből.',
+    dashboardActionsValueProp:
+      'Hozz létre egy ingyenes fiókot a kereséseid mentéséhez, megosztásához és exportálásához – ingyenes, kártya nélkül.',
     continueWithGoogle: 'Folytatás Google-lel',
     email: 'E-mail',
     emailPlaceholder: 'te@pelda.hu',
@@ -638,7 +640,17 @@ const hu: Translations = {
   upgrade: {
     title: 'Oldd fel a korlátlan szűrőket',
     description:
-      'Az ingyenes fiókok egyszerre legfeljebb 3 szűrőt kombinálhatnak. Szerezz élethosszig tartó hozzáférést, hogy korlátlanul rétegezhesd a szűrőket Anglia minden irányítószámán és környékén. Egyetlen fizetés, örökre.',
+      'Felhasználtad az ingyenes fiókod mind az 5 szűrőjét. Szerezz élethosszig tartó hozzáférést, hogy korlátlanul rétegezhesd a szűrőket Anglia minden irányítószámán és környékén. Egyetlen fizetés, örökre.',
+    descriptionSharedUpgrade:
+      'Egy megosztott kereséshez több szűrőt hozzáadni élethosszig tartó hozzáférést igényel – oldd fel a korlátlan szűrőket Anglia minden irányítószámán.',
+    titleRegister: 'Ingyenes fiók létrehozása',
+    descriptionRegister:
+      'Az ingyenes fiókok akár 5 szűrőt oldanak fel, ráadásul menthetsz, megoszthatsz és exportálhatsz – kártya nélkül. Korlátlan szűrőket szeretnél egész Angliában? Válaszd az élethosszig tartó hozzáférést.',
+    descriptionSharedRegister:
+      'Ez egy megosztott keresés. Hozz létre egy ingyenes fiókot, hogy sajátot készíthess akár 5 szűrővel, és menthess, megoszthass és exportálhass – vagy válassz élethosszig tartó hozzáférést a korlátlan szűrőkért.',
+    registerFree: 'Ingyenes fiók létrehozása',
+    lifetimeUpsell: 'Korlátlan szűrőket szeretnél?',
+    goLifetime: 'Élethosszig tartó hozzáférés – {{price}}',
     free: 'Ingyenes',
     freeForEarly: 'Ingyenes a korai felhasználóknak. Bankkártya nélkül.',
     oneTimePayment: 'Egyszeri fizetés. Élethosszig tartó hozzáférés.',
@@ -647,7 +659,7 @@ const hu: Translations = {
     upgradeFor: 'Teljes hozzáférés {{price}} áron',
     registerAndUpgrade: 'Regisztráció és teljes hozzáférés',
     alreadyHaveAccount: 'Már van fiókod? Jelentkezz be',
-    continueFree: 'Folytatás 3 szűrővel',
+    continueFree: 'Egyelőre tovább fedezem fel',
     checkoutFailed: 'A fizetés sikertelen',
   },
 
@@ -685,9 +697,14 @@ const hu: Translations = {
     findingPerfectPostcode: 'Tökéletes irányítószám keresése',
     addFiltersHint: 'Adj hozzá szűrőket a térkép szűkítéséhez a feltételeidnek megfelelően',
     upgradePrompt:
-      'Találj megfelelő irányítószámokat bűnözés, iskolák, zaj, szélessáv, árak és több mint 40 kombinálható szűrő alapján egész Angliában.',
+      'Válaszd az élethosszig tartó hozzáférést, hogy korlátlanul rétegezhesd a szűrőket Anglia minden irányítószámán.',
     oneTimeLifetime: 'Egyszeri fizetés, élethosszig tartó hozzáférés.',
     upgradeToFullMap: 'Teljes térkép megnyitása',
+    registerPrompt:
+      'Hozz létre egy ingyenes fiókot, hogy akár 5 szűrőt kombinálhass, és menthess, megoszthass és exportálhass kereséseket.',
+    registerSubPrompt:
+      'Ingyenes – kártya nélkül. Korlátlan szűrők élethosszig tartó hozzáféréssel.',
+    registerCta: 'Ingyenes fiók létrehozása',
     chooseFilters:
       'Kattints a Hozzáadásra a szűréshez. A kis gombok adatokat mutatnak vagy színezik a térképet.',
     searchFeatures: 'Szűrők keresése...',

frontend/src/i18n/locales/zh.ts

@@ -563,6 +563,7 @@ const zh: Translations = {
     createAccount: '注册账户',
     resetPassword: '重置密码',
     valueProp: '保存搜索、收藏房产，并整理出符合您需求的候选区域。',
+    dashboardActionsValueProp: '注册免费账户，保存、分享并导出您的搜索 — 免费，无需信用卡。',
     continueWithGoogle: '使用 Google 账号继续',
     email: '邮箱',
     emailPlaceholder: 'you@example.com',
@@ -586,7 +587,7 @@ const zh: Translations = {
   upgrade: {
     title: '解锁无限筛选',
     description:
-      '免费账户每次最多可同时组合 3 个筛选条件。获取终身访问权限，即可在英格兰每个邮编和每个社区叠加无限多个筛选条件。一次付款，永久使用。',
+      '您的免费账户已使用全部 5 个筛选条件。获取终身访问权限，即可在英格兰每个邮编和每个社区叠加无限多个筛选条件。一次付款，永久使用。',
     free: '免费',
     freeForEarly: '早期用户免费。无需信用卡。',
     oneTimePayment: '一次性付款。终身访问。',
@@ -595,7 +596,17 @@ const zh: Translations = {
     upgradeFor: '以 {{price}} 升级',
     registerAndUpgrade: '注册并升级',
     alreadyHaveAccount: '已有账户？请登录',
-    continueFree: '继续使用 3 个筛选条件',
+    continueFree: '暂时继续浏览',
+    descriptionSharedUpgrade:
+      '向分享的搜索添加更多筛选条件需要终身访问权限 — 解锁英格兰每个邮编的无限筛选。',
+    titleRegister: '注册免费账户',
+    descriptionRegister:
+      '免费账户解锁最多 5 个筛选条件，并支持保存、分享和导出 — 无需信用卡。想要在整个英格兰使用无限筛选？选择终身访问。',
+    descriptionSharedRegister:
+      '这是一个分享的搜索。注册免费账户，可使用最多 5 个筛选条件，并保存、分享和导出 — 或选择终身访问以解锁无限筛选。',
+    registerFree: '注册免费账户',
+    lifetimeUpsell: '想要无限筛选？',
+    goLifetime: '获取终身访问权限 — {{price}}',
     checkoutFailed: '结账失败',
   },
 
@@ -632,8 +643,10 @@ const zh: Translations = {
     addFilter: '添加筛选条件',
     findingPerfectPostcode: '正在寻找理想邮编',
     addFiltersHint: '添加以下筛选条件，将地图缩小到符合您要求的区域',
-    upgradePrompt:
-      '用治安、学校、噪音、宽带、价格等 40 多项联动筛选条件，在整个英格兰找到匹配的邮编。',
+    upgradePrompt: '选择终身访问，在英格兰每个邮编上叠加无限筛选条件。',
+    registerPrompt: '注册免费账户，可组合最多 5 个筛选条件，并保存、分享和导出您的搜索。',
+    registerSubPrompt: '免费 — 无需信用卡。终身访问可解锁无限筛选。',
+    registerCta: '注册免费账户',
     oneTimeLifetime: '一次性付款，终身访问。',
     upgradeToFullMap: '升级到完整地图',
     chooseFilters: '点击“添加”来筛选。小按钮可查看数据说明或给地图着色。',

frontend/src/lib/url-state.test.ts

@@ -2,6 +2,7 @@ import { beforeEach, describe, expect, it } from 'vitest';
 
 import type { FeatureMeta } from '../types';
 import { parseUrlState, stateToParams } from './url-state';
+import { DEFAULT_OVERLAY_IDS } from './overlays';
 import { INITIAL_VIEW_STATE } from './consts';
 import { createSchoolFilterKey } from './school-filter';
 import { createSpecificCrimeFilterKey } from './crime-filter';
@@ -199,10 +200,10 @@ describe('url-state', () => {
     expect(state.overlays).toEqual(new Set(['noise', 'crime-hotspots']));
   });
 
-  it('enables crime + trees overlays by default on a fresh visit', () => {
+  it('enables the default overlays on a fresh visit', () => {
     const state = parseUrlState();
 
-    expect(state.overlays).toEqual(new Set(['crime-hotspots', 'trees-outside-woodlands']));
+    expect(state.overlays).toEqual(new Set(DEFAULT_OVERLAY_IDS));
   });
 
   it('round-trips an explicit "all overlays off" via the __none sentinel', () => {

server-rs/src/data/crime_records.rs

@@ -158,7 +158,10 @@ impl CrimeRecords {
             ParquetReader::new(file)
                 .get_metadata()
                 .with_context(|| {
-                    format!("Failed to read crime-records parquet metadata at {}", path.display())
+                    format!(
+                        "Failed to read crime-records parquet metadata at {}",
+                        path.display()
+                    )
                 })?
                 .clone()
         };
@@ -193,10 +196,18 @@ impl CrimeRecords {
         // the column builders' write order.
         let mut global_row: u32 = 0;
 
-        let columns: Vec<String> = ["postcode", "month_index", "crime_type", "location", "outcome", "lat", "lon"]
-            .iter()
-            .map(|s| s.to_string())
-            .collect();
+        let columns: Vec<String> = [
+            "postcode",
+            "month_index",
+            "crime_type",
+            "location",
+            "outcome",
+            "lat",
+            "lon",
+        ]
+        .iter()
+        .map(|s| s.to_string())
+        .collect();
 
         let mut offset = 0usize;
         while offset < n {
@@ -337,7 +348,10 @@ impl CrimeRecords {
         if let Some(prev) = cur_pc.take() {
             by_postcode.insert(prev, (cur_start, global_row - cur_start));
         }
-        debug_assert_eq!(global_row as usize, n, "streamed fewer rows than the parquet declares");
+        debug_assert_eq!(
+            global_row as usize, n,
+            "streamed fewer rows than the parquet declares"
+        );
 
         let records = Self {
             month: month.finish()?,
@@ -413,7 +427,7 @@ mod tests {
             .unwrap();
         assert_eq!(robbery.outcome, Some("Court result"));
         assert_eq!(robbery.location, None); // null location → None
-        // Two records have a null outcome (an AA1 Burglary and the BB2 Drugs).
+                                            // Two records have a null outcome (an AA1 Burglary and the BB2 Drugs).
         let null_outcomes = all
             .iter()
             .map(|&i| recs.view(i))
@@ -518,7 +532,10 @@ mod tests {
             rss_after,
         );
 
-        assert!(!recs.by_postcode.is_empty(), "expected at least one postcode");
+        assert!(
+            !recs.by_postcode.is_empty(),
+            "expected at least one postcode"
+        );
         assert!(total > 0, "expected at least one record");
         // The old `.collect()` decoded all rows' string columns at once (tens of
         // GB). Streaming must keep the peak growth far below that; a generous 20GiB

server-rs/src/data/postcode_population.rs

@@ -82,10 +82,7 @@ impl PostcodePopulation {
             bail!("population parquet at {} produced no rows", path.display());
         }
 
-        info!(
-            postcodes = by_postcode.len(),
-            "Postcode population loaded"
-        );
+        info!(postcodes = by_postcode.len(), "Postcode population loaded");
         Ok(Self { by_postcode })
     }
 

server-rs/src/data/spill.rs

@@ -152,7 +152,10 @@ pub struct SpillVecBuilder<T: SpillElem> {
 }
 
 enum Builder<T: SpillElem> {
-    Owned { values: Vec<T>, len: usize },
+    Owned {
+        values: Vec<T>,
+        len: usize,
+    },
     Mapped {
         map: MmapMut,
         len: usize,
@@ -462,7 +465,9 @@ mod tests {
 
     #[test]
     fn builder_streams_identically_owned_and_mapped() {
-        let values: Vec<u32> = (0..50_000u32).map(|n| n.wrapping_mul(2_246_822_519)).collect();
+        let values: Vec<u32> = (0..50_000u32)
+            .map(|n| n.wrapping_mul(2_246_822_519))
+            .collect();
 
         // Owned path (no spill dir): pushes accumulate into a heap Vec.
         let mut owned = SpillVecBuilder::<u32>::with_len(values.len(), None, "u32_owned").unwrap();
@@ -497,7 +502,8 @@ mod tests {
 
         let dir = TempDir::new("builder-spur");
         let mut builder =
-            SpillVecBuilder::<lasso::Spur>::with_len(keys.len(), Some(dir.path()), "spurs").unwrap();
+            SpillVecBuilder::<lasso::Spur>::with_len(keys.len(), Some(dir.path()), "spurs")
+                .unwrap();
         for &k in &keys {
             builder.push(k);
         }
@@ -536,7 +542,8 @@ mod tests {
     #[should_panic(expected = "overflow")]
     fn builder_overfill_panics() {
         let dir = TempDir::new("builder-overfill");
-        let mut builder = SpillVecBuilder::<u32>::with_len(2, Some(dir.path()), "overfill").unwrap();
+        let mut builder =
+            SpillVecBuilder::<u32>::with_len(2, Some(dir.path()), "overfill").unwrap();
         builder.push(1);
         builder.push(2);
         builder.push(3); // one past the declared length

server-rs/src/routes/crime_records.rs

@@ -99,7 +99,11 @@ pub async fn get_crime_records(
             .postcode_to_idx
             .get(&normalized)
             .ok_or_else(|| {
-                (StatusCode::NOT_FOUND, format!("Postcode not found: {normalized}")).into_response()
+                (
+                    StatusCode::NOT_FOUND,
+                    format!("Postcode not found: {normalized}"),
+                )
+                    .into_response()
             })?;
         Selection::Postcode(normalized)
     } else {
@@ -120,12 +124,9 @@ pub async fn get_crime_records(
                 let mut h3_cache: FxHashMap<u64, u64> = FxHashMap::default();
                 let mut seen: FxHashSet<&str> = FxHashSet::default();
                 let mut out: Vec<String> = Vec::new();
-                state.grid.for_each_in_bounds(
-                    min_lat,
-                    min_lon,
-                    max_lat,
-                    max_lon,
-                    |row_idx| {
+                state
+                    .grid
+                    .for_each_in_bounds(min_lat, min_lon, max_lat, max_lon, |row_idx| {
                         let row = row_idx as usize;
                         if cell_for_row_cached(
                             row,
@@ -140,8 +141,7 @@ pub async fn get_crime_records(
                                 out.push(pc.to_string());
                             }
                         }
-                    },
-                );
+                    });
                 out
             }
         };
@@ -177,6 +177,10 @@ pub async fn get_crime_records(
     .map_err(|error| (StatusCode::INTERNAL_SERVER_ERROR, error.to_string()).into_response())?
     .map_err(|error| (StatusCode::INTERNAL_SERVER_ERROR, error).into_response())?;
 
-    info!(total = result.total, returned = result.records.len(), "GET /api/crime-records");
+    info!(
+        total = result.total,
+        returned = result.records.len(),
+        "GET /api/crime-records"
+    );
     Ok(Json(result))
 }

server-rs/src/routes/stats.rs

@@ -11,8 +11,8 @@ use crate::data::{FeatureStats, PostcodePoiMetrics, PropertyData};
 use crate::utils::{postcode_outcode, postcode_sector};
 
 use super::hexagon_stats::{
-    CrimeAreaAverage, CrimeYearPoint, CrimeYearStats, EnumFeatureStats,
-    HistogramStats, NumericFeatureStats, PricePoint,
+    CrimeAreaAverage, CrimeYearPoint, CrimeYearStats, EnumFeatureStats, HistogramStats,
+    NumericFeatureStats, PricePoint,
 };
 
 /// Extract price history (year, price) pairs from matching rows, downsampled if needed.
@@ -398,7 +398,6 @@ pub fn compute_crime_by_year(
     out
 }
 
-
 /// Latest year present anywhere in the by-year crime dataset. The client
 /// compares each selection's last charted year against this to caption
 /// force-level publication gaps (e.g. Greater Manchester ends mid-2019) as
@@ -615,18 +614,12 @@ mod tests {
         assert_eq!(sector.as_deref(), Some("E14 2"));
         assert_eq!(out.len(), 2);
 
-        let burglary = out
-            .iter()
-            .find(|c| c.name == "Burglary (/yr, 7y)")
-            .unwrap();
+        let burglary = out.iter().find(|c| c.name == "Burglary (/yr, 7y)").unwrap();
         assert_eq!(burglary.national, Some(8.0));
         assert_eq!(burglary.outcode, Some(10.0));
         assert_eq!(burglary.sector, Some(5.0));
 
-        let robbery = out
-            .iter()
-            .find(|c| c.name == "Robbery (/yr, 7y)")
-            .unwrap();
+        let robbery = out.iter().find(|c| c.name == "Robbery (/yr, 7y)").unwrap();
         assert_eq!(robbery.national, Some(6.0));
         // The outcode value was NaN — dropped to None; the sector value is finite.
         assert_eq!(robbery.outcode, None);
@@ -637,9 +630,7 @@ mod tests {
     fn area_crime_averages_respect_fields_filter() {
         let avgs = sample_averages();
         // Area averages are keyed by the full crime-feature name.
-        let fields: HashSet<String> = ["Burglary (/yr, 7y)".to_string()]
-            .into_iter()
-            .collect();
+        let fields: HashSet<String> = ["Burglary (/yr, 7y)".to_string()].into_iter().collect();
         let (_, _, out) = area_crime_averages_for(Some("E14 2DG"), &avgs, true, &fields);
         assert_eq!(out.len(), 1);
         assert_eq!(out[0].name, "Burglary (/yr, 7y)");