Content authoring operations

Use this sequence for a new theme:

pnpm content-cli create <theme>
pnpm content-cli import <theme> <word-list-path> --report-json ./reports/import.json
pnpm content-cli analyze <theme> --report-json ./reports/analysis.json
pnpm content-cli refresh <theme>
pnpm content:validate

The import report is the first diagnostic checkpoint. Review rejected words and warnings, then inspect the analysis distribution before asking the engine to simulate the theme. See Themes, Editorial difficulty, and Validation.