Add member template creation

[naotiki]

Summary

• when entering a new author, automatically scaffold a member file
• allow blank image fields and validate frontmatter
• centralize content schemas for validation and config

Testing

• pnpm install
• pnpm check

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https://chatgpt.com/codex/tasks/task_e_684c2fb95910832bad3b48c87385a8aa

[Copilot]

Pull Request Overview

Add centralized frontmatter schemas, scaffold member files automatically, and tighten validation in writeup-generation scripts.

• Centralized frontmatter and category schemas in src/content/schemas.ts and updated src/content.config.ts to import them.
• Refactored writeup-generator scripts to reuse shared schemas, add member template creation (createMemberFile), and validate frontmatter.
• Enhanced prompts with custom category normalization and contest ID validation, and updated the new-writeup script to scaffold member files for new authors.

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/content/schemas.ts	Define shared Zod schemas for writeups and members, and centralize categories.
src/content.config.ts	Replace inline frontmatter definitions with imported centralized schemas.
scripts/writeup-generator/validation.ts	Add functions to validate writeup and member frontmatter using shared schemas.
scripts/writeup-generator/utils.ts	Clean up imports; fix regex in generateFileName for valid filename characters.
scripts/writeup-generator/types.ts	Remove duplicated categories; re-export from centralized schemas; add MemberTemplateData.
scripts/writeup-generator/template.ts	Introduce member template generation, file creation, and frontmatter validation.
scripts/writeup-generator/prompts.ts	Add validateContestId, custom category prefixing, and consolidate validators.
scripts/new-writeup.ts	Detect new authors and scaffold member files before creating writeups.

Comments suppressed due to low confidence (3)

scripts/writeup-generator/template.ts:79

• [nitpick] Consider adding unit tests for the createMemberFile function and its frontmatter validation to ensure member scaffolding behaves as expected.

await validateMemberFrontmatter(data.filePath);

scripts/writeup-generator/prompts.ts:7

• [nitpick] The function name addCustomPrefix may not clearly convey that it also trims and normalizes categories. Consider renaming to something like normalizeCategoryPrefix for clarity.

function addCustomPrefix(category: string): string {

scripts/new-writeup.ts:73

• The existsSync function is used here but not imported. Please add import { existsSync } from 'node:fs'; at the top of the file.

if (isNewAuthor && !existsSync(memberFilePath)) {