diff --git a/frontend/app/admin/availability/page.tsx b/frontend/app/admin/availability/page.tsx
index aab1123..998eb23 100644
--- a/frontend/app/admin/availability/page.tsx
+++ b/frontend/app/admin/availability/page.tsx
@@ -1,5 +1,7 @@
 "use client";
 
+export const dynamic = "force-dynamic";
+
 import { useEffect, useState, useCallback } from "react";
 import { Permission } from "../../auth-context";
 import { adminApi } from "../../api";
diff --git a/frontend/app/admin/invites/page.tsx b/frontend/app/admin/invites/page.tsx
index 166f4f9..65a3eb7 100644
--- a/frontend/app/admin/invites/page.tsx
+++ b/frontend/app/admin/invites/page.tsx
@@ -1,5 +1,7 @@
 "use client";
 
+export const dynamic = "force-dynamic";
+
 import { useEffect, useState, useCallback } from "react";
 import { Permission } from "../../auth-context";
 import { adminApi } from "../../api";
diff --git a/frontend/app/admin/price-history/page.tsx b/frontend/app/admin/price-history/page.tsx
index 5521591..86e3f88 100644
--- a/frontend/app/admin/price-history/page.tsx
+++ b/frontend/app/admin/price-history/page.tsx
@@ -1,5 +1,7 @@
 "use client";
 
+export const dynamic = "force-dynamic";
+
 import { useState } from "react";
 import { Permission } from "../../auth-context";
 import { adminApi } from "../../api";
diff --git a/frontend/app/admin/trades/page.tsx b/frontend/app/admin/trades/page.tsx
index f6cf22f..f41ac57 100644
--- a/frontend/app/admin/trades/page.tsx
+++ b/frontend/app/admin/trades/page.tsx
@@ -1,5 +1,7 @@
 "use client";
 
+export const dynamic = "force-dynamic";
+
 import { useEffect, useState, useCallback, CSSProperties } from "react";
 import { Permission } from "../../auth-context";
 import { adminApi } from "../../api";
diff --git a/frontend/app/components/LanguageSelector.tsx b/frontend/app/components/LanguageSelector.tsx
index a904cca..d8d420e 100644
--- a/frontend/app/components/LanguageSelector.tsx
+++ b/frontend/app/components/LanguageSelector.tsx
@@ -56,10 +56,11 @@ export function LanguageSelector() {
             top: "100%",
             right: 0,
             marginTop: "0.5rem",
-            backgroundColor: "white",
-            border: "1px solid #e5e7eb",
+            backgroundColor: "rgba(255, 255, 255, 0.03)",
+            backdropFilter: "blur(10px)",
+            border: "1px solid rgba(255, 255, 255, 0.08)",
             borderRadius: "0.5rem",
-            boxShadow: "0 4px 6px -1px rgba(0, 0, 0, 0.1)",
+            boxShadow: "0 25px 50px -12px rgba(0, 0, 0, 0.5)",
             zIndex: 1000,
             minWidth: "150px",
           }}
@@ -76,16 +77,18 @@ export function LanguageSelector() {
                 padding: "0.75rem 1rem",
                 textAlign: "left",
                 border: "none",
-                backgroundColor: locale === lang.code ? "#f3f4f6" : "transparent",
+                backgroundColor: locale === lang.code ? "rgba(255, 255, 255, 0.05)" : "transparent",
+                color: "rgba(255, 255, 255, 0.7)",
                 cursor: "pointer",
                 display: "flex",
                 alignItems: "center",
                 gap: "0.5rem",
                 fontSize: "0.875rem",
+                fontFamily: "'DM Sans', system-ui, sans-serif",
               }}
               onMouseEnter={(e) => {
                 if (locale !== lang.code) {
-                  e.currentTarget.style.backgroundColor = "#f9fafb";
+                  e.currentTarget.style.backgroundColor = "rgba(255, 255, 255, 0.05)";
                 }
               }}
               onMouseLeave={(e) => {
diff --git a/frontend/app/exchange/components/ExchangeDetailsStep.tsx b/frontend/app/exchange/components/ExchangeDetailsStep.tsx
index 0f2d7de..8659940 100644
--- a/frontend/app/exchange/components/ExchangeDetailsStep.tsx
+++ b/frontend/app/exchange/components/ExchangeDetailsStep.tsx
@@ -348,24 +348,33 @@ export function ExchangeDetailsStep({
       <div style={styles.tradeSummary}>
         {direction === "buy" ? (
           <p style={styles.summaryText}>
-            {t("detailsStep.summaryBuy").split("{sats}")[0].trim()}{" "}
+            {t("detailsStep.summaryBuy", { sats: "", eur: "" }).split("{sats}")[0].trim()}{" "}
             <strong style={styles.satsValue}>
               <SatsDisplay sats={satsAmount} />
             </strong>
             {", "}
-            {t("detailsStep.summaryBuy").split("{sats}")[1]?.split("{eur}")[0]?.trim()}{" "}
+            {t("detailsStep.summaryBuy", { sats: "", eur: "" })
+              .split("{sats}")[1]
+              ?.split("{eur}")[0]
+              ?.trim()}{" "}
             <strong>{formatEur(eurAmount)}</strong>
           </p>
         ) : (
           <p style={styles.summaryText}>
-            {t("detailsStep.summarySell").split("{sats}")[0]?.split("{eur}")[0]?.trim()}{" "}
+            {t("detailsStep.summarySell", { sats: "", eur: "" })
+              .split("{sats}")[0]
+              ?.split("{eur}")[0]
+              ?.trim()}{" "}
             <strong>{formatEur(eurAmount)}</strong>
             {", "}
-            {t("detailsStep.summarySell").split("{sats}")[0]?.split("{eur}")[1]?.trim()}{" "}
+            {t("detailsStep.summarySell", { sats: "", eur: "" })
+              .split("{sats}")[0]
+              ?.split("{eur}")[1]
+              ?.trim()}{" "}
             <strong style={styles.satsValue}>
               <SatsDisplay sats={satsAmount} />
             </strong>
-            {t("detailsStep.summarySell").split("{sats}")[1]?.trim()}
+            {t("detailsStep.summarySell", { sats: "", eur: "" }).split("{sats}")[1]?.trim()}
           </p>
         )}
       </div>
diff --git a/frontend/app/hooks/useAsyncData.ts b/frontend/app/hooks/useAsyncData.ts
index ecafce7..6c7e72b 100644
--- a/frontend/app/hooks/useAsyncData.ts
+++ b/frontend/app/hooks/useAsyncData.ts
@@ -1,4 +1,4 @@
-import { useState, useEffect, useCallback } from "react";
+import { useState, useEffect, useCallback, useRef } from "react";
 
 /**
  * Hook for fetching async data with loading and error states.
@@ -30,6 +30,16 @@ export function useAsyncData<T>(
   const [isLoading, setIsLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
 
+  // Use ref to store the latest fetcher function to avoid dependency issues
+  const fetcherRef = useRef(fetcher);
+  const onErrorRef = useRef(onError);
+
+  // Update refs when values change
+  useEffect(() => {
+    fetcherRef.current = fetcher;
+    onErrorRef.current = onError;
+  }, [fetcher, onError]);
+
   const fetchData = useCallback(async () => {
     if (!enabled) return;
 
@@ -37,20 +47,20 @@ export function useAsyncData<T>(
     setError(null);
 
     try {
-      const result = await fetcher();
+      const result = await fetcherRef.current();
       setData(result);
     } catch (err) {
       const errorMessage = err instanceof Error ? err.message : "Failed to load data";
       setError(errorMessage);
-      if (onError) {
-        onError(err);
+      if (onErrorRef.current) {
+        onErrorRef.current(err);
       } else {
         console.error("Failed to fetch data:", err);
       }
     } finally {
       setIsLoading(false);
     }
-  }, [fetcher, enabled, onError]);
+  }, [enabled]);
 
   useEffect(() => {
     fetchData();
diff --git a/frontend/app/profile/page.tsx b/frontend/app/profile/page.tsx
index 296fb00..106216a 100644
--- a/frontend/app/profile/page.tsx
+++ b/frontend/app/profile/page.tsx
@@ -94,7 +94,7 @@ export default function ProfilePage() {
     } finally {
       setIsLoadingProfile(false);
     }
-  }, []);
+  }, [t]);
 
   useEffect(() => {
     if (user && isAuthorized) {
diff --git a/frontend/app/signup/page.tsx b/frontend/app/signup/page.tsx
index 829e6ce..5e14d28 100644
--- a/frontend/app/signup/page.tsx
+++ b/frontend/app/signup/page.tsx
@@ -35,33 +35,36 @@ function SignupContent() {
     }
   }, [user, router]);
 
-  const checkInvite = useCallback(async (code: string) => {
-    if (!code.trim()) {
-      setInviteValid(null);
-      setInviteError("");
-      return;
-    }
-
-    setIsCheckingInvite(true);
-    setInviteError("");
-
-    try {
-      const response = await invitesApi.checkInvite(code.trim());
-
-      if (response.valid) {
-        setInviteValid(true);
+  const checkInvite = useCallback(
+    async (code: string) => {
+      if (!code.trim()) {
+        setInviteValid(null);
         setInviteError("");
-      } else {
-        setInviteValid(false);
-        setInviteError(response.error || t("signup.invalidInviteCode"));
+        return;
       }
-    } catch {
-      setInviteValid(false);
-      setInviteError(t("signup.failedToVerify"));
-    } finally {
-      setIsCheckingInvite(false);
-    }
-  }, []);
+
+      setIsCheckingInvite(true);
+      setInviteError("");
+
+      try {
+        const response = await invitesApi.checkInvite(code.trim());
+
+        if (response.valid) {
+          setInviteValid(true);
+          setInviteError("");
+        } else {
+          setInviteValid(false);
+          setInviteError(response.error || t("signup.invalidInviteCode"));
+        }
+      } catch {
+        setInviteValid(false);
+        setInviteError(t("signup.failedToVerify"));
+      } finally {
+        setIsCheckingInvite(false);
+      }
+    },
+    [t]
+  );
 
   // Check invite code on mount if provided in URL
   useEffect(() => {
diff --git a/frontend/app/styles/auth-form.ts b/frontend/app/styles/auth-form.ts
index efe6701..7bfe4ad 100644
--- a/frontend/app/styles/auth-form.ts
+++ b/frontend/app/styles/auth-form.ts
@@ -14,8 +14,8 @@ import {
 
 export const authFormStyles: Record<string, CSSProperties> = {
   main: {
+    ...layoutStyles.main,
     ...layoutStyles.contentCentered,
-    minHeight: "100vh",
     padding: "1rem",
   },
   container: {