fix(web): preserve subscription-only preference display

[495696116]

⚠️ 提交说明 / PR Notice

Important

• 请提供人工撰写的简洁摘要，避免直接粘贴未经整理的 AI 输出。

📝 变更描述 / Description

无生效订阅时，前端会把 subscription_only 显示成 wallet_first，但后端不会回退钱包。

本 PR 同步修改 default/classic：只有 subscription_first 使用钱包回退显示；subscription_only 保留真实值，也不再显示错误的钱包回退提示。后端逻辑不变。

AI-assisted disclosure：实现和说明由 AI 辅助完成，并已依据实际 diff 与验证结果核对。

🚀 变更类型 / Type of change

• 🐛 Bug 修复 (Bug fix) - 请关联对应 Issue，避免将设计取舍、理解偏差或预期不一致直接归类为 bug
• ✨ 新功能 (New feature) - 重大特性建议先通过 Issue 沟通
• ⚡ 性能优化 / 重构 (Refactor)
• 📝 文档更新 (Documentation)

🔗 关联任务 / Related Issue

• Closes [Bug] 无有效订阅时「仅用订阅」被前端错误显示为「优先钱包」 #6222

✅ 提交前检查项 / Checklist

• 人工确认: 我已整理此描述，并逐项核对修改和验证结果，没有粘贴未经核实的生成内容。
• 非重复提交: 我已搜索现有的 Issues 与 PRs，确认不是重复提交。
• Bug fix 说明: 本 PR 已关联对应 Issue。
• 变更理解: 我已理解这些更改的工作原理及可能影响。
• 范围聚焦: 本 PR 未包含任何与当前任务无关的代码改动。
• 本地验证: 已在本地运行下述检查。
• 安全合规: 代码中无敏感凭据，且符合项目代码规范。

📸 运行证明 / Proof of Work

通过：

• default：目标文件 oxfmt、oxlint；bun run typecheck；bun run build
• classic：目标文件 Prettier、ESLint
• repository：git diff --check

classic 的 bun run build 在应用代码编译前因现有 date-fns-tz/date-fns exports 不兼容而失败；本 PR 未修改依赖或 lockfile。

[coderabbitai]

Walkthrough

Both subscription plan card implementations now fall back to displaying wallet_first only for saved subscription_first preferences without active subscriptions. The fallback notice consistently labels the saved preference as subscription-first.

Changes

Subscription preference display

Layer / File(s)	Summary
Restrict displayed fallback preference web/classic/src/components/topup/SubscriptionPlansCard.jsx, web/default/src/features/wallet/components/subscription-plans-card.tsx	Introduces shouldFallbackToWallet so only subscription_first is displayed as wallet_first when no active subscription exists.
Align saved-preference notices web/classic/src/components/topup/SubscriptionPlansCard.jsx, web/default/src/features/wallet/components/subscription-plans-card.tsx	Updates the notice condition and consistently renders the translated subscription-first label.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• QuantumNous/new-api#2879: Updates overlapping subscription-first fallback behavior in the subscription UI and billing flow.

Suggested reviewers: t0ng7u

Poem

I’m a rabbit with a wallet to fill,
Subscription-first now bends to its will.
No active plan? The display makes it clear,
“Subscription first” remains sincere.
subscription_only won’t hop away—
Its saved choice stays on display.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The changes match issue #6222 by preserving subscription_only display and limiting wallet fallback to subscription_first.
Out of Scope Changes check	✅ Passed	The PR only touches the two subscription plan cards needed for the reported display bug, with no evident unrelated changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main UI change: preserving the subscription-only preference display instead of forcing wallet fallback.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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