fix(app): improve file tree naming flow

[murongg]

Summary

• Select only the basename when creating or renaming Markdown files from prefilled file tree inputs.
• Finish active file tree inputs before navigating to another file or folder row.
• Preserve empty template suggested names and show native create/rename failures as error toasts.

Why

• File tree naming inputs should behave consistently when focus moves across the sidebar.
• Duplicate native file names previously failed without visible feedback.

Validation

• pnpm --filter @markra/app test -- src/App.test.tsx src/lib/templates.test.ts src/components/MarkdownFileTreeDrawer.test.tsx passed
• pnpm --filter @markra/shared test -- src/i18n/index.test.ts passed
• pnpm --filter @markra/app typecheck:test passed
• pnpm --filter @markra/app build passed
• pnpm --filter @markra/shared build passed

Related Issues

• Closes [Feature]: 根据模板新建文件的命名逻辑建议 #267

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Project	Deployment	Actions	Updated (UTC)
markra-web	Ready	Preview, Comment	Jun 22, 2026 10:26am