diff --git a/src/features/online-board/components/OnlineBoardFilter.tsx b/src/features/online-board/components/OnlineBoardFilter.tsx
index c1fc1bc8..c94b8e15 100644
--- a/src/features/online-board/components/OnlineBoardFilter.tsx
+++ b/src/features/online-board/components/OnlineBoardFilter.tsx
@@ -44,7 +44,7 @@ export const OnlineBoardFilter: FC = () => {
   const routeParams = useParams<{ lang: string }>();
   const lang = routeParams.lang ?? "ru";
 
-  const [activeTab, setActiveTab] = useState<AccordionTab>("flight");
+  const [activeTab, setActiveTab] = useState<AccordionTab>("route");
 
   // Flight number fields
   const [flightNumber, setFlightNumber] = useState("");
diff --git a/src/features/online-board/components/OnlineBoardStartPage.tsx b/src/features/online-board/components/OnlineBoardStartPage.tsx
index 132342da..e728e192 100644
--- a/src/features/online-board/components/OnlineBoardStartPage.tsx
+++ b/src/features/online-board/components/OnlineBoardStartPage.tsx
@@ -41,9 +41,7 @@ export const OnlineBoardStartPage: FC = () => {
             {t("BOARD.TITLE")}
           </h1>
         }
-        breadcrumbs={[
-          { label: t("BOARD.TITLE") },
-        ]}
+        breadcrumbs={[]}
         contentLeft={
           <>
             <OnlineBoardFilter />
diff --git a/src/features/schedule/components/ScheduleStartPage.tsx b/src/features/schedule/components/ScheduleStartPage.tsx
index c6c0db1c..3cee8041 100644
--- a/src/features/schedule/components/ScheduleStartPage.tsx
+++ b/src/features/schedule/components/ScheduleStartPage.tsx
@@ -295,9 +295,7 @@ export const ScheduleStartPage: FC = () => {
             {t("SCHEDULE.TITLE")}
           </h1>
         }
-        breadcrumbs={[
-          { label: t("SCHEDULE.TITLE"), url: `/${lang}/schedule` },
-        ]}
+        breadcrumbs={[]}
         contentLeft={
           <>
             {scheduleFilter}
diff --git a/src/routes/error/[code]/page.scss b/src/routes/error/[code]/page.scss
index bf97ea41..637171d4 100644
--- a/src/routes/error/[code]/page.scss
+++ b/src/routes/error/[code]/page.scss
@@ -12,8 +12,10 @@
     display: flex;
     padding: 2rem;
 
-    & > * + * {
-      margin-left: 2rem;
+    // Match Angular: v-spacing(2rem) + h-spacing(2rem)
+    & > *:not(:last-child) {
+      margin-right: 2rem;
+      margin-bottom: 2rem;
     }
 
     @include screen.desktop {
@@ -25,16 +27,16 @@
     @include screen.mobile {
       flex-direction: column;
 
-      & > * + * {
-        margin-left: 0;
-        margin-top: 2rem;
+      & > *:not(:last-child) {
+        margin-right: 0;
+        margin-bottom: 2rem;
       }
     }
   }
 
   &__illustration {
-    flex: 0 0 30%;
-    min-height: 300px;
+    // Match Angular: flex: 30% (equivalent to flex: 0 1 30%)
+    flex: 30%;
     background-position: bottom;
     background-repeat: no-repeat;
     background-size: contain;
@@ -48,21 +50,19 @@
   &__code {
     font-size: 8rem;
     color: #a3a3a3;
-    line-height: 1;
-    margin: 0;
   }
 
   &__title {
     font-size: 3rem;
     color: colors.$text-color;
-    margin: 0;
   }
 
   &__content {
-    flex: 1 1 70%;
+    // Match Angular: flex: 70% + v-spacing(1rem)
+    flex: 70%;
 
-    & > * + * {
-      margin-top: 1rem;
+    & > *:not(:last-child) {
+      margin-bottom: 1rem;
     }
 
     @include screen.mobile {
@@ -76,20 +76,85 @@
     line-height: 1.5;
   }
 
+  // Search input — matches Angular error-page-search
+  &__search {
+    width: 100%;
+
+    @include screen.desktop {
+      width: 17rem;
+    }
+
+    margin-bottom: 1rem;
+
+    &-control {
+      position: relative;
+    }
+
+    &-icon {
+      position: absolute;
+      top: 0;
+      right: 0;
+      background: no-repeat;
+      background-image: url("/assets/img/icon--search.svg");
+      width: 2.25rem;
+      height: 2.25rem;
+      background-position: center;
+      cursor: pointer;
+
+      &:hover {
+        background-image: url("/assets/img/icon--search-blue.svg");
+      }
+    }
+
+    input {
+      font-size: 0.875rem;
+      box-sizing: border-box;
+      width: 100%;
+      height: 2.25rem;
+      padding: 0.25rem 0.5rem;
+      border: 1px solid #dfdfdf;
+      background: #fff;
+      -webkit-appearance: none;
+      -moz-appearance: none;
+      appearance: none;
+      transition: all 0.2s;
+      outline: 0 solid transparent;
+      border-radius: 0.1875rem;
+      position: relative;
+      top: 0;
+      left: 0;
+
+      &:focus {
+        border: 1px solid #b7d3f3;
+        box-shadow: 0 0.0625rem 0.1875rem #cad6e5;
+      }
+    }
+  }
+
   &__actions {
     display: flex;
     padding: 2rem 0;
     flex-wrap: wrap;
-    gap: 1rem;
+
+    // Match Angular: h-spacing(1rem) on gt-mobile
+    @include screen.desktop {
+      & > *:not(:last-child) {
+        margin-right: 1rem;
+      }
+    }
 
     @include screen.mobile {
-      flex-direction: column;
+      flex-wrap: wrap;
+
+      & > *:not(:last-child) {
+        margin-bottom: 1rem;
+      }
     }
   }
 
   &__btn {
     height: 35px;
-    display: inline-flex;
+    display: flex;
     align-items: center;
     justify-content: center;
     padding: 0 1.5rem;
diff --git a/src/routes/error/[code]/page.tsx b/src/routes/error/[code]/page.tsx
index c06453c3..142e2dc5 100644
--- a/src/routes/error/[code]/page.tsx
+++ b/src/routes/error/[code]/page.tsx
@@ -1,4 +1,4 @@
-import { useState, useEffect } from "react";
+import { useState, useEffect, useRef } from "react";
 import { useParams } from "@modern-js/runtime/router";
 import { createI18nInstance } from "@/i18n/config.js";
 import { resolveLocaleFromPath, type Language } from "@/i18n/resolver.js";
@@ -52,9 +52,11 @@ const FALLBACK_CONFIG: ErrorConfig = {
 export default function ErrorPage(): JSX.Element {
   const { code } = useParams<{ code: string }>();
   const config = (code ? ERROR_CONFIG[code] : undefined) ?? FALLBACK_CONFIG;
+  const searchRef = useRef<HTMLInputElement>(null);
 
   // Attempt to detect locale from referrer or default to "ru"
   const [translations, setTranslations] = useState<Record<string, string> | null>(null);
+  const [searchTerm, setSearchTerm] = useState("");
 
   useEffect(() => {
     const pathname = typeof window !== "undefined" ? window.location.pathname : "";
@@ -73,6 +75,15 @@ export default function ErrorPage(): JSX.Element {
     });
   }, [config]);
 
+  const handleSearch = () => {
+    if (searchTerm) {
+      window.open(
+        `https://www.aeroflot.ru/search?text=${encodeURIComponent(searchTerm)}`,
+        "_blank",
+      );
+    }
+  };
+
   // Show content immediately (with hardcoded Russian fallback for SSR),
   // then replace with i18n translations on the client
   const title = translations?.title ?? config.titleKey;
@@ -92,6 +103,21 @@ export default function ErrorPage(): JSX.Element {
           <div className="error-page__code">{code ?? "?"}</div>
           <div className="error-page__title">{title}</div>
           <div className="error-page__description">{description}</div>
+          <div className="error-page__search">
+            <div className="error-page__search-control">
+              <input
+                ref={searchRef}
+                type="search"
+                value={searchTerm}
+                onChange={(e) => setSearchTerm(e.target.value)}
+                onKeyDown={(e) => e.key === "Enter" && handleSearch()}
+              />
+              <div
+                className="error-page__search-icon"
+                onClick={handleSearch}
+              />
+            </div>
+          </div>
           <div className="error-page__actions">
             <a
               className="error-page__btn error-page__btn--primary"
diff --git a/src/ui/layout/PageLayout.tsx b/src/ui/layout/PageLayout.tsx
index a16a4242..8365282e 100644
--- a/src/ui/layout/PageLayout.tsx
+++ b/src/ui/layout/PageLayout.tsx
@@ -47,7 +47,7 @@ export const PageLayout: FC<PageLayoutProps> = ({
             <div className="page-layout__title">
               {title}
             </div>
-            <FeedbackButton />
+            {/* FeedbackButton hidden: Angular has it behind FEEDBACK_BUTTON_AVAILABLE feature flag (off by default) */}
           </div>
         </div>
       </div>