Fix DEB training truth finality handling

frontend/app/briefs/[city]/[date]/page.tsx

@@ -1,17 +1,38 @@
 import type { Metadata } from "next";
 import { notFound } from "next/navigation";
+import { cookies, headers } from "next/headers";
 import { BriefDetailPageView } from "@/components/public-content/PublicContentPages";
+import {
+  LANDING_LOCALE_COOKIE,
+  LANDING_LOCALE_QUERY_PARAM,
+  pickLandingLocale,
+  type LandingLocale,
+} from "@/components/landing/landingLocale";
 import {
   PUBLIC_BRIEFS,
   absolutePublicUrl,
   briefPath,
   getBrief,
+  localizeBrief,
 } from "@/content/public-content";
 
 type BriefPageParams = {
   city: string;
   date: string;
 };
+type BriefSearchParams = Promise<Record<string, string | string[] | undefined>>;
+
+async function resolvePublicContentLocale(searchParams: BriefSearchParams): Promise<LandingLocale> {
+  const params = await searchParams;
+  const rawLocale = params[LANDING_LOCALE_QUERY_PARAM];
+  const queryLocale = Array.isArray(rawLocale) ? rawLocale[0] : rawLocale;
+  const [cookieStore, headerStore] = await Promise.all([cookies(), headers()]);
+  return pickLandingLocale(
+    queryLocale,
+    cookieStore.get(LANDING_LOCALE_COOKIE)?.value,
+    headerStore.get("accept-language"),
+  );
+}
 
 export function generateStaticParams() {
   return PUBLIC_BRIEFS.map((brief) => ({
@@ -22,10 +43,15 @@ export function generateStaticParams() {
 
 export async function generateMetadata({
   params,
+  searchParams,
 }: {
   params: Promise<BriefPageParams>;
+  searchParams: BriefSearchParams;
 }): Promise<Metadata> {
-  const { city, date } = await params;
+  const [{ city, date }, locale] = await Promise.all([
+    params,
+    resolvePublicContentLocale(searchParams),
+  ]);
   const brief = getBrief(city, date);
 
   if (!brief) {
@@ -34,51 +60,58 @@ export async function generateMetadata({
     };
   }
 
-  const pathname = briefPath(brief);
+  const localizedBrief = localizeBrief(brief, locale);
+  const pathname = briefPath(localizedBrief);
 
   return {
-    title: brief.title,
+    title: localizedBrief.title,
-    description: brief.description,
+    description: localizedBrief.description,
     alternates: {
       canonical: pathname,
     },
     openGraph: {
       type: "article",
-      title: brief.title,
+      title: localizedBrief.title,
-      description: brief.description,
+      description: localizedBrief.description,
       url: pathname,
-      publishedTime: brief.publishedAt,
+      publishedTime: localizedBrief.publishedAt,
-      modifiedTime: brief.updatedAt,
+      modifiedTime: localizedBrief.updatedAt,
     },
     twitter: {
       card: "summary",
-      title: brief.title,
+      title: localizedBrief.title,
-      description: brief.description,
+      description: localizedBrief.description,
     },
   };
 }
 
 export default async function BriefDetailPage({
   params,
+  searchParams,
 }: {
   params: Promise<BriefPageParams>;
+  searchParams: BriefSearchParams;
 }) {
-  const { city, date } = await params;
+  const [{ city, date }, locale] = await Promise.all([
+    params,
+    resolvePublicContentLocale(searchParams),
+  ]);
   const brief = getBrief(city, date);
 
   if (!brief) {
     notFound();
   }
 
-  const pathname = briefPath(brief);
+  const localizedBrief = localizeBrief(brief, locale);
+  const pathname = briefPath(localizedBrief);
   const jsonLd = [
     {
       "@context": "https://schema.org",
       "@type": "Article",
-      headline: brief.title,
+      headline: localizedBrief.title,
-      description: brief.description,
+      description: localizedBrief.description,
-      datePublished: brief.publishedAt,
+      datePublished: localizedBrief.publishedAt,
-      dateModified: brief.updatedAt,
+      dateModified: localizedBrief.updatedAt,
       mainEntityOfPage: absolutePublicUrl(pathname),
       author: {
         "@type": "Organization",
@@ -91,9 +124,9 @@ export default async function BriefDetailPage({
         url: "https://polyweather.top",
       },
       about: [
-        brief.cityName,
+        localizedBrief.cityName,
-        brief.market,
+        localizedBrief.market,
-        brief.settlementSource,
+        localizedBrief.settlementSource,
         "DEB forecast methodology",
       ],
     },
@@ -110,7 +143,7 @@ export default async function BriefDetailPage({
         {
           "@type": "ListItem",
           position: 2,
-          name: brief.cityName,
+          name: localizedBrief.cityName,
           item: absolutePublicUrl(pathname),
         },
       ],
@@ -123,7 +156,7 @@ export default async function BriefDetailPage({
         type="application/ld+json"
         dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }}
       />
-      <BriefDetailPageView brief={brief} />
+      <BriefDetailPageView brief={brief} locale={locale} />
     </>
   );
 }

frontend/app/briefs/page.tsx

@@ -1,21 +1,54 @@
 import type { Metadata } from "next";
+import { cookies, headers } from "next/headers";
 import { BriefsIndexPageView } from "@/components/public-content/PublicContentPages";
+import {
+  LANDING_LOCALE_COOKIE,
+  LANDING_LOCALE_QUERY_PARAM,
+  pickLandingLocale,
+  type LandingLocale,
+} from "@/components/landing/landingLocale";
+import { PUBLIC_CONTENT_COPY } from "@/content/public-content";
 
-export const metadata: Metadata = {
+type BriefsSearchParams = Promise<Record<string, string | string[] | undefined>>;
-  title: "Weather Market Brief",
-  description:
-    "Public PolyWeather market briefs for temperature judgment, settlement-source checks, DEB context, and source freshness notes.",
-  alternates: {
-    canonical: "/briefs",
-  },
-  openGraph: {
-    title: "Weather Market Brief | PolyWeather",
-    description:
-      "Public market briefs for temperature judgment, settlement-source checks, DEB context, and source freshness notes.",
-    url: "/briefs",
-  },
-};
 
-export default function BriefsPage() {
+async function resolvePublicContentLocale(searchParams: BriefsSearchParams): Promise<LandingLocale> {
-  return <BriefsIndexPageView />;
+  const params = await searchParams;
+  const rawLocale = params[LANDING_LOCALE_QUERY_PARAM];
+  const queryLocale = Array.isArray(rawLocale) ? rawLocale[0] : rawLocale;
+  const [cookieStore, headerStore] = await Promise.all([cookies(), headers()]);
+  return pickLandingLocale(
+    queryLocale,
+    cookieStore.get(LANDING_LOCALE_COOKIE)?.value,
+    headerStore.get("accept-language"),
+  );
+}
+
+export async function generateMetadata({
+  searchParams,
+}: {
+  searchParams: BriefsSearchParams;
+}): Promise<Metadata> {
+  const locale = await resolvePublicContentLocale(searchParams);
+  const copy = PUBLIC_CONTENT_COPY[locale];
+  return {
+    title: copy.briefIndexEyebrow,
+    description: copy.briefIndexDescription,
+    alternates: {
+      canonical: "/briefs",
+    },
+    openGraph: {
+      title: `Weather Market Brief | PolyWeather`,
+      description: copy.briefIndexDescription,
+      url: "/briefs",
+    },
+  };
+}
+
+export default async function BriefsPage({
+  searchParams,
+}: {
+  searchParams: BriefsSearchParams;
+}) {
+  const locale = await resolvePublicContentLocale(searchParams);
+  return <BriefsIndexPageView locale={locale} />;
 }

frontend/components/landing/InstitutionalLandingPage.tsx

@@ -325,7 +325,7 @@ function InstitutionalLandingScreen({ locale }: { locale: LandingLocale }) {
               {isEn ? "Guide" : "读图"}
             </Link>
             <Link href="/briefs" className="hover:text-slate-950">
-              Weather Market Brief
+              {isEn ? "Briefs" : "简报"}
             </Link>
             <a href="#pricing" className="hover:text-slate-950">
               {isEn ? "Pricing" : "定价"}

frontend/components/landing/__tests__/landingPricingReferral.test.ts

@@ -105,7 +105,7 @@ export function runTests() {
   );
   assert(source.includes("#contact"), "landing navigation must expose the contact section");
   assert(source.includes('href="/briefs"'), "landing navigation must expose public Weather Market Brief assets");
-  assert(source.includes("Weather Market Brief"), "landing page must label the public brief entry clearly");
+  assert(source.includes('isEn ? "Briefs" : "简报"'), "landing page must label the public brief entry in both languages");
   assert(source.includes('id="contact"'), "landing page must include a contact section");
   assert(source.includes("yhrsc30@gmail.com"), "landing page must show the operator contact email");
   assert(source.includes("mailto:${CONTACT_EMAIL}"), "landing contact email must be clickable");

frontend/components/public-content/PublicContentPages.tsx

@@ -1,12 +1,19 @@
 import Link from "next/link";
+import { LandingLocaleToggle } from "@/components/landing/LandingLocaleToggle";
+import type { LandingLocale } from "@/components/landing/landingLocale";
 import {
   METHODOLOGY_PAGES,
+  PUBLIC_CONTENT_COPY,
   PUBLIC_BRIEFS,
   SOURCE_PAGES,
   absolutePublicUrl,
   briefPath,
   methodologyPath,
   sourcePath,
+  localizeBrief,
+  localizeBriefs,
+  localizeMethodologyPage,
+  localizeSourcePage,
   type MethodologyPage,
   type PublicBrief,
   type SourcePage,
@@ -31,27 +38,32 @@ const primaryButton =
 const secondaryButton =
   "inline-flex min-h-10 items-center justify-center rounded-md border border-slate-300 bg-white px-4 py-2 text-sm font-semibold text-slate-900 transition hover:border-slate-400 hover:bg-slate-50";
 
-function PublicHeader() {
+function PublicHeader({ locale = "en-US" }: { locale?: LandingLocale }) {
+  const copy = PUBLIC_CONTENT_COPY[locale];
+
   return (
     <header className="border-b border-slate-200 bg-white/90">
       <div className="mx-auto flex w-full max-w-6xl flex-col gap-3 px-4 py-4 sm:flex-row sm:items-center sm:justify-between sm:px-6 lg:px-8">
         <Link className="text-base font-black text-slate-950" href="/">
           PolyWeather
         </Link>
-        <nav className="flex flex-wrap gap-2 text-sm font-semibold text-slate-700">
+        <div className="flex flex-wrap items-center gap-2 sm:justify-end">
-          <Link className="rounded-md px-2.5 py-1.5 hover:bg-slate-100" href="/briefs">
+          <nav className="flex flex-wrap gap-2 text-sm font-semibold text-slate-700">
-            Briefs
+            <Link className="rounded-md px-2.5 py-1.5 hover:bg-slate-100" href="/briefs">
-          </Link>
+              {locale === "en-US" ? "Briefs" : "简报"}
-          <Link className="rounded-md px-2.5 py-1.5 hover:bg-slate-100" href="/methodology">
+            </Link>
-            Methodology
+            <Link className="rounded-md px-2.5 py-1.5 hover:bg-slate-100" href="/methodology">
-          </Link>
+              {copy.methodology}
-          <Link className="rounded-md px-2.5 py-1.5 hover:bg-slate-100" href="/sources">
+            </Link>
-            Sources
+            <Link className="rounded-md px-2.5 py-1.5 hover:bg-slate-100" href="/sources">
-          </Link>
+              {copy.sources}
-          <Link className="rounded-md px-2.5 py-1.5 hover:bg-slate-100" href="/docs/intro">
+            </Link>
-            Docs
+            <Link className="rounded-md px-2.5 py-1.5 hover:bg-slate-100" href="/docs/intro">
-          </Link>
+              {copy.docs}
-        </nav>
+            </Link>
+          </nav>
+          <LandingLocaleToggle locale={locale} />
+        </div>
       </div>
     </header>
   );
@@ -81,19 +93,20 @@ function PageIntro({
   );
 }
 
-function SourceLinks({ slugs }: { slugs: string[] }) {
+function SourceLinks({ locale = "en-US", slugs }: { locale?: LandingLocale; slugs: string[] }) {
   return (
     <div className="flex flex-wrap gap-2">
       {slugs.map((slug) => {
         const source = SOURCE_PAGES.find((entry) => entry.slug === slug);
         if (!source) return null;
+        const localizedSource = localizeSourcePage(source, locale);
         return (
           <Link
             className="rounded-md border border-slate-200 bg-white px-3 py-1.5 text-xs font-semibold text-slate-700 hover:border-slate-300 hover:bg-slate-50"
-            href={sourcePath(source)}
+            href={sourcePath(localizedSource)}
             key={slug}
           >
-            {source.title}
+            {localizedSource.title}
           </Link>
         );
       })}
@@ -101,19 +114,20 @@ function SourceLinks({ slugs }: { slugs: string[] }) {
   );
 }
 
-function MethodologyLinks({ slugs }: { slugs: string[] }) {
+function MethodologyLinks({ locale = "en-US", slugs }: { locale?: LandingLocale; slugs: string[] }) {
   return (
     <div className="flex flex-wrap gap-2">
       {slugs.map((slug) => {
         const page = METHODOLOGY_PAGES.find((entry) => entry.slug === slug);
         if (!page) return null;
+        const localizedPage = localizeMethodologyPage(page, locale);
         return (
           <Link
             className="rounded-md border border-slate-200 bg-white px-3 py-1.5 text-xs font-semibold text-slate-700 hover:border-slate-300 hover:bg-slate-50"
-            href={methodologyPath(page)}
+            href={methodologyPath(localizedPage)}
             key={slug}
           >
-            {page.title}
+            {localizedPage.title}
           </Link>
         );
       })}
@@ -121,7 +135,15 @@ function MethodologyLinks({ slugs }: { slugs: string[] }) {
   );
 }
 
-function BriefCard({ brief }: { brief: PublicBrief }) {
+function BriefCard({
+  brief,
+  locale = "en-US",
+  readBriefLabel,
+}: {
+  brief: PublicBrief;
+  locale?: LandingLocale;
+  readBriefLabel: string;
+}) {
   return (
     <article className={`${panel} flex flex-col gap-5 p-5`}>
       <div className="flex flex-wrap items-start justify-between gap-3">
@@ -149,52 +171,60 @@ function BriefCard({ brief }: { brief: PublicBrief }) {
       </div>
       <div className="flex flex-wrap items-center gap-3">
         <Link className={secondaryButton} href={briefPath(brief)}>
-          Read brief
+          {readBriefLabel}
         </Link>
-        <SourceLinks slugs={brief.sourceSlugs.slice(0, 2)} />
+        <SourceLinks locale={locale} slugs={brief.sourceSlugs.slice(0, 2)} />
       </div>
     </article>
   );
 }
 
-export function BriefsIndexPageView() {
+export function BriefsIndexPageView({ locale = "en-US" }: { locale?: LandingLocale }) {
+  const copy = PUBLIC_CONTENT_COPY[locale];
+  const briefs = localizeBriefs(locale);
+
   return (
     <div className={pageShell}>
-      <PublicHeader />
+      <PublicHeader locale={locale} />
       <PageIntro
-        description="Public Weather Market Brief pages turn selected city-market reads into indexable evidence: settlement source, DEB context, model disagreement, freshness notes, and a clear research disclaimer."
+        description={copy.briefIndexDescription}
-        eyebrow="Weather Market Brief"
+        eyebrow={copy.briefIndexEyebrow}
-        title="Public market briefs for temperature judgment"
+        title={copy.briefIndexTitle}
       />
       <div className={contentWrap}>
         <section className="grid gap-4">
-          {PUBLIC_BRIEFS.map((brief) => (
+          {briefs.map((brief) => (
-            <BriefCard brief={brief} key={`${brief.city}-${brief.date}`} />
+            <BriefCard
+              brief={brief}
+              key={`${brief.city}-${brief.date}`}
+              locale={locale}
+              readBriefLabel={copy.readBrief}
+            />
           ))}
         </section>
         <section className={`${panel} grid gap-5 p-5 md:grid-cols-2`}>
           <div>
-            <p className={sectionTitle}>Methodology</p>
+            <p className={sectionTitle}>{copy.methodology}</p>
             <h2 className="mt-2 text-2xl font-black text-slate-950">
-              How the public read is produced
+              {copy.methodologyPanelTitle}
             </h2>
             <p className={`${bodyText} mt-3`}>
-              Briefs cross-link to the DEB methodology and settlement-source priority pages so readers can audit why PolyWeather does not treat generic city forecasts as market truth.
+              {copy.methodologyPanelBody}
             </p>
             <div className="mt-4">
-              <MethodologyLinks slugs={["deb", "settlement-sources"]} />
+              <MethodologyLinks locale={locale} slugs={["deb", "settlement-sources"]} />
             </div>
           </div>
           <div>
-            <p className={sectionTitle}>Source notes</p>
+            <p className={sectionTitle}>{copy.sourceNotes}</p>
             <h2 className="mt-2 text-2xl font-black text-slate-950">
-              Official-source context
+              {copy.sourcePanelTitle}
             </h2>
             <p className={`${bodyText} mt-3`}>
-              Source pages explain why MGM, METAR, HKO, NOAA, and model guidance are displayed separately in PolyWeather workflows.
+              {copy.sourcePanelBody}
             </p>
             <div className="mt-4">
-              <SourceLinks slugs={["mgm", "metar", "hko", "noaa"]} />
+              <SourceLinks locale={locale} slugs={["mgm", "metar", "hko", "noaa"]} />
             </div>
           </div>
         </section>
@@ -203,25 +233,34 @@ export function BriefsIndexPageView() {
   );
 }
 
-export function BriefDetailPageView({ brief }: { brief: PublicBrief }) {
+export function BriefDetailPageView({
+  brief,
+  locale = "en-US",
+}: {
+  brief: PublicBrief;
+  locale?: LandingLocale;
+}) {
+  const copy = PUBLIC_CONTENT_COPY[locale];
+  const localizedBrief = localizeBrief(brief, locale);
+
   return (
     <div className={pageShell}>
       <PublicContentAnalytics
         eventType="brief_view"
-        onceKey={`brief:${brief.city}:${brief.date}`}
+        onceKey={`brief:${localizedBrief.city}:${localizedBrief.date}`}
-        payload={{ city: brief.city, date: brief.date, source: brief.settlementSource }}
+        payload={{ city: localizedBrief.city, date: localizedBrief.date, source: localizedBrief.settlementSource }}
       />
-      <PublicHeader />
+      <PublicHeader locale={locale} />
       <PageIntro
-        description={brief.description}
+        description={localizedBrief.description}
-        eyebrow={`${brief.cityName}, ${brief.countryName} / ${brief.date}`}
+        eyebrow={`${localizedBrief.cityName}, ${localizedBrief.countryName} / ${localizedBrief.date}`}
-        title={brief.title}
+        title={localizedBrief.title}
       />
       <div className={contentWrap}>
         <section className="grid gap-5 lg:grid-cols-[1.6fr_0.9fr]">
           <article className={`${panel} p-5`}>
             <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
-              {brief.signals.map((signal) => (
+              {localizedBrief.signals.map((signal) => (
                 <div className="rounded-md border border-slate-200 bg-slate-50 p-4" key={signal.label}>
                   <p className="text-xs font-semibold text-slate-500">{signal.label}</p>
                   <p className="mt-1 font-mono text-2xl font-black text-slate-950">{signal.value}</p>
@@ -230,30 +269,30 @@ export function BriefDetailPageView({ brief }: { brief: PublicBrief }) {
               ))}
             </div>
             <div className="mt-6 grid gap-5">
-              <BriefSection title="DEB read" body={brief.debRead} />
+              <BriefSection title={copy.detailLabels.debRead} body={localizedBrief.debRead} />
-              <BriefSection title="Settlement-source read" body={brief.sourceRead} />
+              <BriefSection title={copy.detailLabels.settlementSourceRead} body={localizedBrief.sourceRead} />
-              <BriefSection title="Model context" body={brief.modelRead} />
+              <BriefSection title={copy.detailLabels.modelContext} body={localizedBrief.modelRead} />
-              <BriefSection title="Risk notes" body={brief.riskRead} />
+              <BriefSection title={copy.detailLabels.riskNotes} body={localizedBrief.riskRead} />
             </div>
           </article>
           <aside className={`${panel} h-fit p-5`}>
-            <p className={sectionTitle}>Snapshot</p>
+            <p className={sectionTitle}>{copy.snapshot}</p>
             <dl className="mt-4 grid gap-3 text-sm">
-              <InfoRow label="Market" value={brief.market} />
+              <InfoRow label={copy.market} value={localizedBrief.market} />
-              <InfoRow label="Settlement source" value={brief.settlementSource} />
+              <InfoRow label={copy.settlementSource} value={localizedBrief.settlementSource} />
-              <InfoRow label="Updated" value={formatDateTime(brief.updatedAt)} />
+              <InfoRow label={copy.updated} value={formatDateTime(localizedBrief.updatedAt, locale)} />
-              <InfoRow label="Freshness" value={brief.dataFreshness} />
+              <InfoRow label={copy.freshness} value={localizedBrief.dataFreshness} />
             </dl>
             <div className="mt-5 flex flex-col gap-3">
               <PublicContentCta
                 className={primaryButton}
                 href="/terminal"
-                payload={{ city: brief.city, date: brief.date, cta: "terminal" }}
+                payload={{ city: localizedBrief.city, date: localizedBrief.date, cta: "terminal" }}
               >
-                {brief.primaryCtaLabel}
+                {localizedBrief.primaryCtaLabel}
               </PublicContentCta>
               <Link className={secondaryButton} href="/briefs">
-                All public briefs
+                {copy.allPublicBriefs}
               </Link>
             </div>
           </aside>
@@ -261,9 +300,9 @@ export function BriefDetailPageView({ brief }: { brief: PublicBrief }) {
 
         <section className="grid gap-5 lg:grid-cols-[1fr_1fr]">
           <div className={`${panel} p-5`}>
-            <p className={sectionTitle}>Checks before acting</p>
+            <p className={sectionTitle}>{copy.checksBeforeActing}</p>
             <ul className="mt-4 grid gap-3">
-              {brief.checkpoints.map((checkpoint) => (
+              {localizedBrief.checkpoints.map((checkpoint) => (
                 <li className={bodyText} key={checkpoint}>
                   {checkpoint}
                 </li>
@@ -271,15 +310,15 @@ export function BriefDetailPageView({ brief }: { brief: PublicBrief }) {
             </ul>
           </div>
           <div className={`${panel} p-5`}>
-            <p className={sectionTitle}>Distribution copy</p>
+            <p className={sectionTitle}>{copy.distributionCopy}</p>
-            <p className={`${bodyText} mt-4`}>{brief.distributionText}</p>
+            <p className={`${bodyText} mt-4`}>{localizedBrief.distributionText}</p>
             <div className="mt-4">
               <PublicContentOutboundLink
                 className={secondaryButton}
-                href={`https://twitter.com/intent/tweet?text=${encodeURIComponent(brief.distributionText)}&url=${encodeURIComponent(absolutePublicUrl(briefPath(brief)))}`}
+                href={`https://twitter.com/intent/tweet?text=${encodeURIComponent(localizedBrief.distributionText)}&url=${encodeURIComponent(absolutePublicUrl(briefPath(localizedBrief)))}`}
-                payload={{ city: brief.city, date: brief.date, destination: "x_intent" }}
+                payload={{ city: localizedBrief.city, date: localizedBrief.date, destination: "x_intent" }}
               >
-                Share on X
+                {copy.shareOnX}
               </PublicContentOutboundLink>
             </div>
           </div>
@@ -287,21 +326,21 @@ export function BriefDetailPageView({ brief }: { brief: PublicBrief }) {
 
         <section className={`${panel} grid gap-5 p-5 md:grid-cols-2`}>
           <div>
-            <p className={sectionTitle}>Methodology links</p>
+            <p className={sectionTitle}>{copy.methodologyLinks}</p>
             <div className="mt-4">
-              <MethodologyLinks slugs={brief.methodologySlugs} />
+              <MethodologyLinks locale={locale} slugs={localizedBrief.methodologySlugs} />
             </div>
           </div>
           <div>
-            <p className={sectionTitle}>Source links</p>
+            <p className={sectionTitle}>{copy.sourceLinks}</p>
             <div className="mt-4">
-              <SourceLinks slugs={brief.sourceSlugs} />
+              <SourceLinks locale={locale} slugs={localizedBrief.sourceSlugs} />
             </div>
           </div>
         </section>
 
         <p className="rounded-md border border-amber-200 bg-amber-50 p-4 text-sm leading-6 text-amber-900">
-          {brief.notFinancialAdvice}
+          {localizedBrief.notFinancialAdvice}
         </p>
       </div>
     </div>
@@ -453,8 +492,8 @@ export function SourceDetailPageView({ source }: { source: SourcePage }) {
   );
 }
 
-function formatDateTime(value: string) {
+function formatDateTime(value: string, locale: LandingLocale = "en-US") {
-  return new Intl.DateTimeFormat("en", {
+  return new Intl.DateTimeFormat(locale === "en-US" ? "en" : "zh-CN", {
     dateStyle: "medium",
     timeStyle: "short",
   }).format(new Date(value));

frontend/components/public-content/__tests__/publicContentAssets.test.ts

@@ -59,6 +59,15 @@ export function runTests() {
       content.includes("distributionText"),
     "public briefs must carry disclaimer, freshness, settlement source, and shareable distribution copy",
   );
+  assert(
+    content.includes("PUBLIC_CONTENT_COPY") &&
+      content.includes('"zh-CN"') &&
+      content.includes('"en-US"') &&
+      content.includes("公开天气市场简报") &&
+      content.includes("安卡拉") &&
+      content.includes("阅读简报"),
+    "public brief content must provide Chinese and English localized copy",
+  );
   assert(
     briefDetail.includes("generateStaticParams") &&
       briefDetail.includes("generateMetadata") &&
@@ -77,11 +86,18 @@ export function runTests() {
     "methodology and source detail routes must expose structured data for GEO/SEO",
   );
   assert(
-    publicPages.includes('MethodologyLinks slugs={["deb", "settlement-sources"]}') &&
+    publicPages.includes('MethodologyLinks locale={locale} slugs={["deb", "settlement-sources"]}') &&
-      publicPages.includes('SourceLinks slugs={["mgm", "metar", "hko", "noaa"]}') &&
+      publicPages.includes('SourceLinks locale={locale} slugs={["mgm", "metar", "hko", "noaa"]}') &&
       briefsIndex.includes("Weather Market Brief"),
     "brief index must cross-link to DEB methodology and settlement source pages",
   );
+  assert(
+    publicPages.includes("LandingLocaleToggle") &&
+      publicPages.includes("localizeBrief") &&
+      publicPages.includes("PUBLIC_CONTENT_COPY") &&
+      publicPages.includes('locale === "en-US" ? "Briefs" : "简报"'),
+    "public content pages must render the shared language toggle and localized brief copy",
+  );
   assert(
     analytics.includes('"brief_view"') &&
       analytics.includes('"brief_cta_click"') &&

frontend/content/public-content.ts

@@ -1,3 +1,5 @@
+import type { LandingLocale } from "@/components/landing/landingLocale";
+
 export const PUBLIC_CONTENT_BASE_URL = "https://polyweather.top";
 
 export type PublicBriefSignal = {
@@ -57,6 +59,140 @@ export type SourcePage = {
   relatedMethodologySlugs: string[];
 };
 
+export type PublicContentCopy = {
+  allPublicBriefs: string;
+  briefIndexDescription: string;
+  briefIndexEyebrow: string;
+  briefIndexTitle: string;
+  checksBeforeActing: string;
+  distributionCopy: string;
+  docs: string;
+  freshness: string;
+  market: string;
+  methodology: string;
+  methodologyIndexDescription: string;
+  methodologyIndexEyebrow: string;
+  methodologyIndexTitle: string;
+  methodologyLinks: string;
+  methodologyPanelBody: string;
+  methodologyPanelTitle: string;
+  openLiveTerminal: string;
+  readBrief: string;
+  readMethodology: string;
+  readSourceNote: string;
+  settlementSource: string;
+  shareOnX: string;
+  snapshot: string;
+  sourceIndexDescription: string;
+  sourceIndexEyebrow: string;
+  sourceIndexTitle: string;
+  sourceLinks: string;
+  sourceNotes: string;
+  sourcePanelBody: string;
+  sourcePanelTitle: string;
+  sources: string;
+  updated: string;
+  detailLabels: {
+    debRead: string;
+    modelContext: string;
+    riskNotes: string;
+    settlementSourceRead: string;
+  };
+};
+
+export const PUBLIC_CONTENT_COPY: Record<LandingLocale, PublicContentCopy> = {
+  "zh-CN": {
+    allPublicBriefs: "全部公开简报",
+    briefIndexDescription:
+      "公开天气市场简报把选定城市的市场读数整理为可索引证据：结算源、DEB 背景、模型分歧、新鲜度备注，以及明确的研究免责声明。",
+    briefIndexEyebrow: "天气市场简报",
+    briefIndexTitle: "公开天气市场简报",
+    checksBeforeActing: "行动前检查",
+    distributionCopy: "分发文案",
+    docs: "文档",
+    freshness: "新鲜度",
+    market: "市场",
+    methodology: "方法",
+    methodologyIndexDescription:
+      "公开方法页解释 PolyWeather 如何处理 DEB 融合、结算源优先级、新鲜度和来源校验。",
+    methodologyIndexEyebrow: "方法",
+    methodologyIndexTitle: "PolyWeather 如何读取天气市场",
+    methodologyLinks: "方法链接",
+    methodologyPanelBody:
+      "简报会交叉链接 DEB 方法和结算源优先级页面，让读者能审计为什么 PolyWeather 不把通用城市预报直接当作市场真实值。",
+    methodologyPanelTitle: "公开读数如何产生",
+    openLiveTerminal: "打开实时终端",
+    readBrief: "阅读简报",
+    readMethodology: "阅读方法",
+    readSourceNote: "阅读来源说明",
+    settlementSource: "结算源",
+    shareOnX: "分享到 X",
+    snapshot: "快照",
+    sourceIndexDescription:
+      "来源页把官方观测、机场观测和模型指引分开展示，方便读者审计 PolyWeather 为什么优先使用与结算相关的证据。",
+    sourceIndexEyebrow: "来源",
+    sourceIndexTitle: "用于公开审计的天气来源说明",
+    sourceLinks: "来源链接",
+    sourceNotes: "来源说明",
+    sourcePanelBody:
+      "来源页解释为什么 MGM、METAR、HKO、NOAA 和模型指引会在 PolyWeather 工作流中分开展示。",
+    sourcePanelTitle: "官方来源上下文",
+    sources: "来源",
+    updated: "更新",
+    detailLabels: {
+      debRead: "DEB 读数",
+      modelContext: "模型上下文",
+      riskNotes: "风险备注",
+      settlementSourceRead: "结算源读数",
+    },
+  },
+  "en-US": {
+    allPublicBriefs: "All public briefs",
+    briefIndexDescription:
+      "Public Weather Market Brief pages turn selected city-market reads into indexable evidence: settlement source, DEB context, model disagreement, freshness notes, and a clear research disclaimer.",
+    briefIndexEyebrow: "Weather Market Brief",
+    briefIndexTitle: "Public market briefs for temperature judgment",
+    checksBeforeActing: "Checks before acting",
+    distributionCopy: "Distribution copy",
+    docs: "Docs",
+    freshness: "Freshness",
+    market: "Market",
+    methodology: "Methodology",
+    methodologyIndexDescription:
+      "Public methodology pages explain how PolyWeather handles DEB blending, settlement-source priority, freshness, and source reconciliation for prediction-market weather analysis.",
+    methodologyIndexEyebrow: "Methodology",
+    methodologyIndexTitle: "How PolyWeather reads weather markets",
+    methodologyLinks: "Methodology links",
+    methodologyPanelBody:
+      "Briefs cross-link to the DEB methodology and settlement-source priority pages so readers can audit why PolyWeather does not treat generic city forecasts as market truth.",
+    methodologyPanelTitle: "How the public read is produced",
+    openLiveTerminal: "Open live terminal",
+    readBrief: "Read brief",
+    readMethodology: "Read methodology",
+    readSourceNote: "Read source note",
+    settlementSource: "Settlement source",
+    shareOnX: "Share on X",
+    snapshot: "Snapshot",
+    sourceIndexDescription:
+      "Source pages separate official observations, airport observations, and model guidance so readers can inspect why PolyWeather prioritizes settlement-relevant evidence.",
+    sourceIndexEyebrow: "Sources",
+    sourceIndexTitle: "Weather source notes for public audit",
+    sourceLinks: "Source links",
+    sourceNotes: "Source notes",
+    sourcePanelBody:
+      "Source pages explain why MGM, METAR, HKO, NOAA, and model guidance are displayed separately in PolyWeather workflows.",
+    sourcePanelTitle: "Official-source context",
+    sources: "Sources",
+    updated: "Updated",
+    detailLabels: {
+      debRead: "DEB read",
+      modelContext: "Model context",
+      riskNotes: "Risk notes",
+      settlementSourceRead: "Settlement-source read",
+    },
+  },
+};
+
 export const PUBLIC_BRIEFS: PublicBrief[] = [
   {
     city: "ankara",
@@ -384,6 +520,193 @@ export const SOURCE_PAGES: SourcePage[] = [
   },
 ];
 
+const BRIEF_LOCALIZATIONS: Record<string, Partial<PublicBrief>> = {
+  "ankara:2026-06-24": {
+    cityName: "安卡拉",
+    countryName: "土耳其",
+    title: "安卡拉天气市场简报 - 2026年6月24日",
+    description:
+      "安卡拉最高温公开简报，聚焦 MGM 结算源行为、DEB 融合预报背景和异常值复核。",
+    market: "当日最高温判断",
+    settlementSource: "MGM 官方站",
+    dataFreshness:
+      "静态公开快照。付费终端用户行动前应核对最新官方观测和 SSE replay 状态。",
+    debRead:
+      "DEB 将日内最高温读数压在孤立 MGM 尖峰下方，更接近已观测的官方区间。",
+    sourceRead:
+      "MGM 被视为主要结算参考。单个 27.1 C 点位在接受为新高前，需要与相邻官方读数比对。",
+    modelRead:
+      "ECMWF 在午后窗口比 DEB 融合更暖，但公开简报把官方观测置于纯模型移动之上。",
+    riskRead:
+      "主要风险是晚些时候官方更新或来源侧修正，导致公开快照后的认可高温发生变化。",
+    notFinancialAdvice:
+      "本简报是用于预测市场准备的天气研究内容，不构成金融建议，也不保证结算结果。",
+    distributionText:
+      "安卡拉 2026-06-24 公开天气市场简报：MGM 官方读数更支持 24.5 C 已观测高温，而非孤立 27.1 C 尖峰；DEB 仍低于异常点。非金融建议。",
+    primaryCtaLabel: "打开实时终端",
+    signals: [
+      {
+        label: "目前官方高温",
+        value: "24.5 C",
+        detail: "用于对比任何孤立更高点的官方来源值。",
+      },
+      {
+        label: "异常点待复核",
+        value: "27.1 C",
+        detail: "突然出现的单源值需要相邻时间验证。",
+      },
+      {
+        label: "DEB 公开读数",
+        value: "低于尖峰",
+        detail: "融合路径仍更接近已验证观测带。",
+      },
+    ],
+    checkpoints: [
+      "检查疑似尖峰是否进入官方高温摘要。",
+      "在把单点视为结算相关之前，先比较相邻 MGM 观测。",
+      "市场关闭前查看付费终端的实时图表 patch 和来源新鲜度。",
+    ],
+  },
+  "hong-kong:2026-06-24": {
+    cityName: "香港",
+    countryName: "香港",
+    title: "香港天气市场简报 - 2026年6月24日",
+    description:
+      "公开简报展示 PolyWeather 如何把 HKO/长洲/机场观测与 DEB、模型分歧放在一起解释最高温市场。",
+    market: "城市与机场最高温判断",
+    settlementSource: "HKO 官方网络",
+    dataFreshness:
+      "静态公开快照。HKO 和站点缓存刷新后，实时终端数值可能不同。",
+    debRead:
+      "到午后后段，实况观测与模型分歧趋于一致，DEB 支持较窄的高温窗口。",
+    sourceRead:
+      "解释机场单独移动前，应先把 HKO 网络观测作为需要校验的来源族。",
+    modelRead:
+      "模型分歧有限，因此来源新鲜度和站点选择比大尺度天气不确定性更重要。",
+    riskRead:
+      "主要风险是午后后段特定站点保温，或官方摘要出现较晚修订。",
+    notFinancialAdvice:
+      "本简报是用于预测市场准备的天气研究内容，不构成金融建议，也不保证结算结果。",
+    distributionText:
+      "香港 2026-06-24 公开天气市场简报：来源选择和 HKO 新鲜度比模型分歧更关键。非金融建议。",
+    primaryCtaLabel: "打开实时终端",
+    signals: [
+      {
+        label: "来源族",
+        value: "HKO",
+        detail: "先使用官方站上下文，再解释机场读数。",
+      },
+      {
+        label: "模型分歧",
+        value: "低",
+        detail: "晚间不确定性主要来自站点行为。",
+      },
+      {
+        label: "终端需要",
+        value: "新鲜度",
+        detail: "实时来源时间戳决定公开快照是否仍有用。",
+      },
+    ],
+    checkpoints: [
+      "比较市场温度桶前先确认 HKO 站点时间戳。",
+      "把机场 METAR 观测与 HKO 网络读数分开解释。",
+      "如果公开快照已超过一个刷新周期，检查终端来源健康状态。",
+    ],
+  },
+  "new-york:2026-06-24": {
+    cityName: "纽约",
+    countryName: "美国",
+    title: "纽约天气市场简报 - 2026年6月24日",
+    description:
+      "纽约温度市场公开简报，连接 METAR、NOAA 上下文、DEB 融合和日内尾段风险检查。",
+    market: "机场关联最高温判断",
+    settlementSource: "METAR 与 NOAA 站点上下文",
+    dataFreshness:
+      "静态公开快照。付费终端用户应检查当前 METAR 观测和官方摘要。",
+    debRead:
+      "DEB 用最新观测趋势校验偏暖模型指引，而不是直接追随原始模型高温。",
+    sourceRead:
+      "METAR 提供快速机场证据，NOAA 上下文帮助确认机场读数是否具代表性。",
+    modelRead:
+      "偏暖模型指引只有在和机场实况、云量/风场上下文校验后才有价值。",
+    riskRead:
+      "主要风险是日内尾段云层短暂打开，将机场观测推入更高温度桶。",
+    notFinancialAdvice:
+      "本简报是用于预测市场准备的天气研究内容，不构成金融建议，也不保证结算结果。",
+    distributionText:
+      "纽约 2026-06-24 公开天气市场简报：DEB 将偏暖模型指引与机场实时证据融合。非金融建议。",
+    primaryCtaLabel: "打开实时终端",
+    signals: [
+      {
+        label: "快速证据",
+        value: "METAR",
+        detail: "机场观测定义短周期读数。",
+      },
+      {
+        label: "复核",
+        value: "NOAA",
+        detail: "官方上下文帮助审计最终最高温解释。",
+      },
+      {
+        label: "DEB 立场",
+        value: "融合",
+        detail: "没有实况确认，不追随偏暖模型运行。",
+      },
+    ],
+    checkpoints: [
+      "在每日高温窗口结束前观察最后两个 METAR 周期。",
+      "检查模型偏暖是否得到云量和风场观测支持。",
+      "最终解释结算前先使用官方来源上下文。",
+    ],
+  },
+};
+
+const METHODOLOGY_TITLE_LOCALIZATIONS: Record<string, string> = {
+  deb: "DEB 预测方法",
+  "settlement-sources": "结算源优先级",
+};
+
+const SOURCE_TITLE_LOCALIZATIONS: Record<string, string> = {
+  ecmwf: "ECMWF 模型指引",
+  hko: "HKO 官方观测",
+  metar: "METAR 机场观测",
+  mgm: "MGM 天气来源",
+  noaa: "NOAA 天气上下文",
+};
+
+export function localizeBrief(brief: PublicBrief, locale: LandingLocale): PublicBrief {
+  if (locale === "en-US") return brief;
+  const localized = BRIEF_LOCALIZATIONS[`${brief.city}:${brief.date}`] || {};
+  return {
+    ...brief,
+    ...localized,
+    checkpoints: localized.checkpoints || brief.checkpoints,
+    methodologySlugs: localized.methodologySlugs || brief.methodologySlugs,
+    signals: localized.signals || brief.signals,
+    sourceSlugs: localized.sourceSlugs || brief.sourceSlugs,
+  };
+}
+
+export function localizeBriefs(locale: LandingLocale) {
+  return PUBLIC_BRIEFS.map((brief) => localizeBrief(brief, locale));
+}
+
+export function localizeMethodologyPage(page: MethodologyPage, locale: LandingLocale): MethodologyPage {
+  if (locale === "en-US") return page;
+  return {
+    ...page,
+    title: METHODOLOGY_TITLE_LOCALIZATIONS[page.slug] || page.title,
+  };
+}
+
+export function localizeSourcePage(page: SourcePage, locale: LandingLocale): SourcePage {
+  if (locale === "en-US") return page;
+  return {
+    ...page,
+    title: SOURCE_TITLE_LOCALIZATIONS[page.slug] || page.title,
+  };
+}
+
 export function briefPath(brief: PublicBrief) {
   return `/briefs/${brief.city}/${brief.date}`;
 }

src/analysis/deb_algorithm.py

@@ -880,6 +880,7 @@ def update_daily_record(
     shadow_probabilities=None,
     calibration_summary=None,
     hourly_error=None,
+    actual_is_final=True,
 ):
     """
     保存/更新某城市某天的各个模型预报与最终实测值
@@ -986,7 +987,7 @@ def update_daily_record(
 
     next_mu = round(mu, 2) if mu is not None else None
     if (
-        old_actual == actual_high
+        old_actual == (actual_high if actual_is_final else old_actual)
         and old_forecasts == merged_forecasts
         and (deb_prediction is None or old_deb == deb_prediction)
         and (mu is None or old_mu == next_mu)
@@ -1007,15 +1008,21 @@ def update_daily_record(
     ):
         return
 
-    # actual_high 应该是日内最高温，理论上不应下降；防止异常写入覆盖已确认高值
+    # Only final settlement truth may update actual_high. Intraday max_so_far is
-    if old_actual is not None and actual_high is not None:
+    # useful context, but treating it as settled truth poisons DEB training.
-        try:
+    next_actual_high = old_actual
-            actual_high = max(float(old_actual), float(actual_high))
+    if actual_is_final:
-        except Exception:
+        next_actual_high = actual_high
-            pass
+        # actual_high 应该是日内最高温，理论上不应下降；防止异常写入覆盖已确认高值
+        if old_actual is not None and actual_high is not None:
+            try:
+                next_actual_high = max(float(old_actual), float(actual_high))
+            except Exception:
+                pass
 
     existing["forecasts"] = merged_forecasts
-    existing["actual_high"] = actual_high
+    if actual_is_final or next_actual_high is not None:
+        existing["actual_high"] = next_actual_high
     if deb_prediction is not None:
         existing["deb_prediction"] = deb_prediction
     if mu is not None:
@@ -1031,16 +1038,16 @@ def update_daily_record(
     if next_hourly_error is not None:
         existing["hourly_error"] = next_hourly_error
 
-    if actual_high is not None:
+    if actual_is_final and next_actual_high is not None:
         try:
             _persist_truth_record(
                 city_name,
                 date_str,
-                float(actual_high),
+                float(next_actual_high),
                 updated_by="runtime:update_daily_record",
                 reason="update_daily_record",
                 source_payload={
-                    "actual_high": actual_high,
+                    "actual_high": next_actual_high,
                     "deb_prediction": deb_prediction,
                     "mu": next_mu,
                 },
@@ -1161,8 +1168,12 @@ def calculate_dynamic_weight_components(
     sorted_dates = sorted(city_data.keys(), reverse=True)
     today_str = datetime.now().strftime("%Y-%m-%d")
     available_days = sum(
-        1 for d in sorted_dates
+        1
-        if d != today_str and city_data[d].get("actual_high") is not None
+        for d in sorted_dates
+        if d != today_str
+        and city_data[d].get("actual_high") is not None
+        and isinstance(city_data[d].get("forecasts"), dict)
+        and any(v is not None for v in city_data[d].get("forecasts", {}).values())
     )
 
     # ── 改进3: 自适应 lookback — 数据多的城市用更多历史 ──
@@ -1187,6 +1198,7 @@ def calculate_dynamic_weight_components(
         if actual is None:
             continue
 
+        usable_day = False
         for model in forecasts.keys():
             if model in past_forecasts and past_forecasts[model] is not None:
                 try:
@@ -1194,6 +1206,7 @@ def calculate_dynamic_weight_components(
                     av = float(actual)
                 except (TypeError, ValueError):
                     continue
+                usable_day = True
                 # Track signed error for bias
                 model_biases[model] += (pv - av)  # positive = model overpredicts
                 bias_samples[model] += 1
@@ -1208,6 +1221,8 @@ def calculate_dynamic_weight_components(
                 decay_weight = decay_factor ** days_used
                 errors[model].append((blended_error, decay_weight))
 
+        if not usable_day:
+            continue
         days_used += 1
         if days_used >= effective_lookback:
             break

src/analysis/trend_engine.py

@@ -974,6 +974,7 @@ def analyze_weather_trend(
             deb_prediction=_deb_to_save,
             mu=mu,
             probabilities=_prob_list,
+            actual_is_final=False,
         )
     except Exception:
         pass

tests/test_deb_training_truth.py

@@ -0,0 +1,88 @@
+from src.database.runtime_state import (
+    DailyRecordRepository,
+    RuntimeStateDB,
+    TrainingFeatureRecordRepository,
+    TruthRecordRepository,
+)
+
+
+def _wire_runtime_repos(monkeypatch, tmp_path):
+    from src.analysis import deb_algorithm
+
+    db = RuntimeStateDB(str(tmp_path / "polyweather.db"))
+    daily_repo = DailyRecordRepository(db)
+    truth_repo = TruthRecordRepository(db)
+    feature_repo = TrainingFeatureRecordRepository(db)
+    monkeypatch.setattr(deb_algorithm, "_daily_record_repo", daily_repo)
+    monkeypatch.setattr(deb_algorithm, "_truth_record_repo", truth_repo)
+    monkeypatch.setattr(deb_algorithm, "_training_feature_repo", feature_repo)
+    monkeypatch.setattr(deb_algorithm, "_history_cache", {})
+    monkeypatch.setattr(deb_algorithm, "_history_mtime", 0)
+    monkeypatch.setenv("POLYWEATHER_STATE_STORAGE_MODE", "sqlite")
+    return db
+
+
+def test_intraday_daily_record_does_not_persist_unfinal_actual_as_truth(monkeypatch, tmp_path):
+    from src.analysis.deb_algorithm import update_daily_record
+
+    db = _wire_runtime_repos(monkeypatch, tmp_path)
+
+    update_daily_record(
+        "ankara",
+        "2026-06-24",
+        {"ECMWF": 28.0, "GFS": 27.0},
+        24.0,
+        deb_prediction=27.5,
+        mu=27.2,
+        actual_is_final=False,
+    )
+
+    with db.connect() as conn:
+        daily = conn.execute(
+            """
+            SELECT actual_high, deb_prediction, mu, payload_json
+            FROM daily_records_store
+            WHERE city = ? AND target_date = ?
+            """,
+            ("ankara", "2026-06-24"),
+        ).fetchone()
+        truth_count = conn.execute(
+            """
+            SELECT count(*) AS n
+            FROM truth_records_store
+            WHERE city = ? AND target_date = ?
+            """,
+            ("ankara", "2026-06-24"),
+        ).fetchone()["n"]
+
+    assert daily is not None
+    assert daily["actual_high"] is None
+    assert daily["deb_prediction"] == 27.5
+    assert daily["mu"] == 27.2
+    assert truth_count == 0
+
+
+def test_dynamic_weights_skip_actual_only_rows_when_selecting_recent_training_days(monkeypatch):
+    from src.analysis.deb_algorithm import calculate_dynamic_weight_components
+
+    history = {"ankara": {}}
+    for day in range(23, 15, -1):
+        history["ankara"][f"2026-06-{day:02d}"] = {"actual_high": 20.0}
+    history["ankara"]["2026-06-15"] = {
+        "actual_high": 20.0,
+        "forecasts": {"ECMWF": 20.0, "GFS": 30.0},
+    }
+    history["ankara"]["2026-06-14"] = {
+        "actual_high": 20.0,
+        "forecasts": {"ECMWF": 20.0, "GFS": 30.0},
+    }
+    monkeypatch.setattr("src.analysis.deb_algorithm.load_history", lambda _path: history)
+
+    components = calculate_dynamic_weight_components(
+        "ankara",
+        {"ECMWF": 20.0, "GFS": 30.0},
+        lookback_days=7,
+    )
+
+    assert components["weights"]["ECMWF"] > components["weights"]["GFS"]
+    assert components["prediction"] < 25.0