Improve receive request flow

[Jim8y]

Purpose

This PR is the second small P2 wallet UX improvement and focuses only on the receive/payment-request flow. It turns the old static receive QR page into a clearer, more useful wallet receive request experience without changing transaction signing, dAPI, RPC selection, wallet storage, or send execution.

What changed

• Reworked the Receive page into a structured receive request screen with a QR card, optional amount, memo, reference data, safety copy, and primary actions.
• The generated neo: URI now includes optional asset, positive amount, memo, and data query parameters.
• Added request validation so invalid/non-positive amounts show an inline error and disable copy/share actions.
• Added copy-request and share-QR actions. Share QR captures the QR card to a temporary PNG and opens the native share sheet.
• Added an optional request summary inside the QR card so shared QR images can visibly show amount/memo/reference details when present.
• Preserved scanned payment-request metadata through ScanPage and shows memo/data as read-only request details on SendPage.
• Normalized QR amount parsing/formatting with invariant culture so amount=1.23 behaves consistently across device languages.
• Added English and Simplified Chinese strings for the new receive request UI.

Out of scope

• No transaction construction changes.
• No private-key, password, biometric, storage, dAPI, or network behavior changes.
• No global visual system or Shell navigation redesign.
• Homepage, Send risk hints, and Settings Security Center improvements remain separate PRs.

Validation

• xmllint --noout OneGateApp/Pages/ReceivePage.xaml OneGateApp/Pages/SendPage.xaml OneGateApp/Properties/Strings.resx OneGateApp/Properties/Strings.zh-Hans.resx
• git diff --check
• Android build: dotnet build OneGateApp/OneGateApp.csproj -f net10.0-android -p:RuntimeIdentifier=android-arm64 -p:EmbedAssembliesIntoApk=true
• iOS simulator build: dotnet build OneGateApp/OneGateApp.csproj -f net10.0-ios -p:RuntimeIdentifier=iossimulator-arm64 -p:EnableCodeSigning=false -p:CodesignKey= -p:CodesignProvision= -p:ProvisioningType=automatic
• Android emulator smoke test: launched on onegate_api36, opened the Receive page, verified layout, scrolling, and receive action buttons are reachable. Screenshot will be added as a PR comment, not committed to the repository.
• iOS simulator: clean build succeeded. Runtime UI automation was limited because global xcode-select points to CommandLineTools and the accessibility tooling requires full Xcode selection via sudo; direct simctl launch was inconsistent on this simulator, so iOS validation is build-level for this PR.
• Current checkout does not contain a test project, so dotnet test is not available.

Known existing warnings: NU1903 for SQLitePCLRaw.* packages and iOS asset duplicate MT7158 warnings were observed; they are pre-existing and not introduced by this PR.

---

目的

这个 PR 是第二个小型 P2 钱包体验优化，只聚焦收款/付款请求流程。它把旧的静态收款二维码页升级成更清晰、更有用的钱包收款请求体验，不改变交易签名、dAPI、RPC 选择、钱包存储或发送执行逻辑。

修改内容

• 将 Receive 页面重构为结构化收款请求界面，包含二维码卡片、可选金额、备注、参考数据、安全说明和主要操作按钮。
• 生成的 neo: URI 现在会包含可选的 asset、正数 amount、memo 和 data 查询参数。
• 添加请求校验，非法或非正数金额会显示内联错误，并禁用复制/分享操作。
• 添加复制请求和分享二维码操作。分享二维码会将二维码卡片截成临时 PNG，并打开系统原生分享面板。
• 在二维码卡片中添加可选请求摘要，因此分享出去的二维码图片在有金额/备注/参考数据时也能直接显示这些信息。
• 在 ScanPage 中保留扫码得到的付款请求元数据，并在 SendPage 中以只读请求详情展示 memo/data。
• 使用 invariant culture 规范二维码金额的解析和格式化，确保 amount=1.23 在不同设备语言下行为一致。
• 为新的收款请求界面添加英文和简体中文文案。

不在范围内

• 不修改交易构造。
• 不修改私钥、密码、生物识别、存储、dAPI 或网络行为。
• 不做全局视觉系统或 Shell 导航重构。
• 首页、发送风险提示和设置安全中心优化仍然留在独立 PR 中。

验证

• xmllint --noout OneGateApp/Pages/ReceivePage.xaml OneGateApp/Pages/SendPage.xaml OneGateApp/Properties/Strings.resx OneGateApp/Properties/Strings.zh-Hans.resx
• git diff --check
• Android build: dotnet build OneGateApp/OneGateApp.csproj -f net10.0-android -p:RuntimeIdentifier=android-arm64 -p:EmbedAssembliesIntoApk=true
• iOS simulator build: dotnet build OneGateApp/OneGateApp.csproj -f net10.0-ios -p:RuntimeIdentifier=iossimulator-arm64 -p:EnableCodeSigning=false -p:CodesignKey= -p:CodesignProvision= -p:ProvisioningType=automatic
• Android 模拟器冒烟测试：在 onegate_api36 上启动应用，打开 Receive 页面，验证布局、滚动和收款操作按钮可达。截图会以 PR 评论形式添加，不提交进代码库。
• iOS 模拟器：clean build 成功。运行时 UI 自动化受限，因为全局 xcode-select 指向 CommandLineTools，而可访问性工具需要通过 sudo 切到完整 Xcode；当前 simulator 的直接 simctl launch 也不稳定，所以这个 PR 的 iOS 验证覆盖到 build 级别。
• 当前 checkout 中没有测试项目，因此无法运行 dotnet test。

已知既有警告：观察到 SQLitePCLRaw.* 包的 NU1903 警告和 iOS asset duplicate MT7158 警告；这些是既有问题，不是本 PR 引入。

[Jim8y]

Android emulator screenshots

Captured from onegate_api36. Screenshots are attached here only and are not committed to the repository.

Receive request first screen:

Receive request details and action buttons:

[Jim8y]

Split follow-up for easier review:

• Created PR Improve receive request UI #39 with only the Receive request UI: optional amount/memo/data fields, request URI generation, validation, copy request, share QR, and related strings.
• Kept ScanPage parsing and SendPage payment-request display out of Improve receive request UI #39 so those can be reviewed separately if needed.

This keeps the first Receive change around the same review size as PR #33.

[Jim8y]

Closing in favor of smaller receive-flow PRs. The ReceivePage payment-request redesign ships in #39 (which also completes zh-Hant); the remaining Scan->Send payment-request metadata round-trip (memo/data pass-through + decode hardening) will be opened as a separate small PR carved from this branch. The branch codex/p2-receive-request is preserved so that slice can still be extracted.