~anthropic/claude-sonnet-latest → B (6:4)

Side B fixes a real bug (empty /-/ index due to a bogus 'https://.' parent), adds a substantive resolvers module with typed GithubImportCard rendering, and includes broad test/CSS coverage across surfaces, delivering concrete user-facing value. Side A improves DSL prose-link tokenization and deterministic block masking (useful correctness/robustness work), but is narrower in scope and mostly refines existing linkification rather than fixing a broken feature or adding new capability.