Release v4.113.0

Changed

• Expanded the canonical screen browser harness into a two-item acceptance check that records selected-row identity, scoped comment query, stale-response discard, clear-selection, native command payload, projection persistence, dialog/deep-link, and theme/package rendering blockers instead of treating enabled controls as success. (part of #168) (part of #173)
• Replaced the Studio production harness blocker stub with real new/import/save/reopen/export/Play operations that run when a Studio URL is provided and report operation-specific blockers otherwise. (part of #168) (part of #173)
• Replaced the MCP folder-source blocker stub with a JSON-RPC transcript client for initialize, tool discovery, scratch workspace open, PreserveTrivia proposal, stale revision refusal, dropped-comments check, apply, reopen, and revision-change verification. (part of #168) (part of #173)
• Refreshed the released screen vector matrix to keep Stage 4.49.2 partial evidence labeled partial and prepare a Stage 4.49.4 rerun once the compatible CLI release is available. (part of #173)