fix: preserve alternate format input while typing

[nrps9909]

Summary

• keep the focused raw input when an alternate format parses to the same value that the picker just formatted
• allow a longer format to continue receiving characters after a shorter format becomes valid
• continue syncing the input immediately when a panel or controlled update selects a different date

Regression

With format={['DD-MM-YYYY', 'DD-MM-YY']}, exact base 16084b6a1593d8815a6ae65cba4e6f7ce8d48c9a rewrites the typed prefix 01-12-20 to 01-12-2020, preventing normal continuation to a four-digit year.

The new regression types 01-12-2024 character by character, asserts that the ambiguous short prefix remains untouched, submits the completed value, and then verifies that a controlled update to a different date still replaces the input.

Validation

• full test suite: 15 suites, 469 passed, 2 skipped, 29 snapshots passed
• complete Picker scope: 110 passed, 1 skipped, 5 snapshots passed
• complete RangePicker scope: 123 passed, 1 skipped, 6 snapshots passed
• ESM, CJS, and declaration build passed
• source ESLint: 0 errors, 16 existing hook warnings
• focused Prettier and diff checks passed

Overlap audit

Current open PRs #1005, #1006, #986, and #947 touch one or more of the same selector files for Android IME handling, manual clearing, or keyboard semantics. None addresses alternate-format input normalization or the YY / YYYY boundary. This PR stays scoped to that distinct state-synchronization behavior.

Fixes #956.
Related to #911.

AI assistance disclosure: Codex was used to trace the input/value synchronization path, construct the causal regression, run the validation matrix, audit open changed-file overlap, and draft this description. I verified the base failure, head behavior, test results, diff, and signed commit before submission.

Summary by CodeRabbit

• 新功能
  • 新增输入内容保留选项，可在外部值变化时根据条件保留用户当前输入。
  • 优化日期输入解析，支持同时配置四位和两位年份格式。
• 问题修复
  • 改善受控日期选择器的输入同步，避免有效输入在重新渲染时被不必要地覆盖。
  • 修复部分匹配日期格式时的输入显示与变更触发问题。
• 测试
  • 新增多日期格式、部分输入及受控值更新场景的覆盖。

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 9a9374d0-026b-467b-8526-891fa35cf3b9

📥 Commits

Reviewing files that changed from the base of the PR and between 16084b6 and 3782bfb.

📒 Files selected for processing (3)

• src/PickerInput/Selector/Input.tsx
• src/PickerInput/Selector/hooks/useInputProps.ts
• tests/picker.spec.tsx

Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review.

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Walkthrough

组件新增输入文本保留判断。输入状态统一通过更新函数维护。日期选择器现在支持在短日期格式匹配时继续输入四位年份，并验证受控值变化行为。

Changes

输入值保留流程

Layer / File(s)	Summary
输入保留契约与解析判断 src/PickerInput/Selector/Input.tsx, src/PickerInput/Selector/hooks/useInputProps.ts	InputProps 新增 preserveInputOnValueChange。getInputProps 根据当前文本的解析结果和下一个值判断是否保留输入。
输入状态同步与场景验证 src/PickerInput/Selector/Input.tsx, tests/picker.spec.tsx	组件使用 inputValueRef 和 updateInputValue 统一同步输入状态。测试覆盖 DD-MM-YYYY 与 DD-MM-YY 并存时输入四位年份，以及受控值重新渲染。

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to 3782b

The picker preserves equivalent alternate-format text while typing while continuing to apply different controlled date updates normally. No actionable merge-blocking risk remains after normal checks and review.

Suggested reviewers: zombiej, qdyanbing, afc163

Poem

小兔敲键盘，年份继续长
短格式相遇，输入不慌张
数值同步稳，文本仍清亮
回车日期定，测试来鼓掌
月光下提交，代码闪银光

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	标题准确概括了主要变更：用户输入过程中保留备用格式的原始文本。
Linked Issues check	✅ Passed	变更满足问题 #956 的要求。preserveInputOnValueChange 会在备用格式解析为相同值时保留当前输入，因此用户可以继续输入四位年份。受控值更新为其他日期时，组件仍会同步输入框内容。新增测试覆盖了 01-12-2024 场景。
Out of Scope Changes check	✅ Passed	所有代码变更和测试变更都围绕问题 #956 的日期输入保留行为。未发现与目标无关的代码或测试变更。

• Fix all pre-merge checks with AI

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests

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