fix(i18n): preserve remaining Vietnamese localization (#7935)

* fix(i18n): preserve remaining Vietnamese localization

* chore(quality): rebaseline file-size cap for 9 dashboard components (i18n wiring)

Restoring the Vietnamese localization on 9 dashboard components (useTranslations
wiring + t()/tc() call-site swaps for previously hardcoded strings) grows each
file by a small, irreducible amount. Bumps the frozen file-size-baseline.json
caps to match, with a justification entry per the project's own ratchet policy.

Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>

* fix(i18n): wire weekday localization + add missing qwen CLI description

Two gaps left by this PR's own new contract tests, caught while
reconciling the branch against the release tip:

- CostOverviewTab.tsx added formatWeekdayLabel() but never called it;
  the Weekly Usage Pattern chart still showed raw English day
  abbreviations regardless of locale. Now maps weeklyPattern rows
  through it before handing them to WeeklyPatternCard.
- cliTools.toolDescriptions was missing an entry for "qwen" (a
  baseUrlSupport:"full" tool) in both en.json and vi.json, failing
  the PR's own cli-catalog-display-contract.test.ts.

Covered by the PR's existing tests/unit/dashboard-localization-contract.test.ts
and tests/unit/cli-catalog-display-contract.test.ts (both now pass).

Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>

* i18n(vi): backfill the 4 proxySubscription keys #7299 added to en.json

#7299 (proxy subscriptions) merged while this branch was rebasing, adding
settings.proxySubscriptionsTab and settings.proxySubscription.error.{LOCAL_CORE_ENDPOINT_INVALID,
NEEDS_CORE_NOT_CONFIGURED,NO_USABLE_NODES} to en.json. This PR's own
i18n-vi-completeness contract asserts full en↔vi key parity, so the merge of the
current release tip surfaced them as missing. Adds the Vietnamese translations,
keeping the SS/VMess/Trojan/VLESS/SOCKS5 technical terms verbatim.

Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>

---------

Co-authored-by: nguyenha935 <208228297+nguyenha935@users.noreply.github.com>
Co-authored-by: Diego Rodrigues de Sa e Souza <diegosouza.pw@gmail.com>
Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>
Co-authored-by: nguyenha935 <nguyenha935@users.noreply.github.com>

src/shared/components/Select.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { useId } from "react";
+import { useTranslations } from "next-intl";
 import { cn } from "@/shared/utils/cn";
 
 interface SelectOption {
@@ -22,7 +23,7 @@ export default function Select({
   options = [],
   value,
   onChange,
-  placeholder = "Select an option",
+  placeholder,
   error,
   hint,
   disabled = false,
@@ -33,6 +34,7 @@ export default function Select({
   children,
   ...props
 }: SelectProps) {
+  const t = useTranslations("common");
   const generatedId = useId();
   const selectId = externalId || generatedId;
   const errorId = error ? `${selectId}-error` : undefined;
@@ -72,9 +74,9 @@ export default function Select({
           )}
           {...props}
         >
-          {!children && placeholder && (
+          {!children && (placeholder ?? t("selectOption")) && (
             <option value="" disabled className="bg-surface text-text-muted">
-              {placeholder}
+              {placeholder ?? t("selectOption")}
             </option>
           )}
           {!children &&