Fix theme consistency, i18n completeness, CSS variable naming, and hardcoded strings

src/app/developers/page.tsx

@@ -334,7 +334,7 @@ function EndpointRow({ endpoint }: { endpoint: Endpoint }) {
         alignItems: "center",
         gap: "0.5rem 0.75rem",
         padding: "0.7rem 0",
-        borderTop: "1px solid var(--border)",
+        borderTop: "1px solid var(--border-subtle)",
       }}
     >
       <code
@@ -346,7 +346,7 @@ function EndpointRow({ endpoint }: { endpoint: Endpoint }) {
             "ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace",
           fontSize: "0.85rem",
           background: "color-mix(in srgb, var(--color-text-muted) 8%, transparent)",
-          border: "1px solid var(--border)",
+          border: "1px solid var(--border-subtle)",
           borderRadius: "var(--radius-sm)",
           padding: "0.3rem 0.55rem",
           whiteSpace: "nowrap",
@@ -396,7 +396,7 @@ export default function DevelopersPage() {
                 "ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace",
               fontSize: "0.85rem",
               background: "color-mix(in srgb, var(--color-text-muted) 8%, transparent)",
-              border: "1px solid var(--border)",
+              border: "1px solid var(--border-subtle)",
               borderRadius: "var(--radius-sm)",
               padding: "0.6rem 0.75rem",
               whiteSpace: "pre-wrap",