docs(readme): sync client version with package.json

[google-labs-jules]

Generated by: .github/prompts/documentation-readme.md

Reasoning:

[Priority Queue Item]: [a] README Synchronization (Drift). Identified a version mismatch in the root README.md where the Client (Frontend-PWA) was listed as v13.1.0 while package.json identifies it as 13.3.0.
[Safety Checks]: ADR coherence verified; used standard layer vocabulary. Changes are documentation-only and do not affect application logic.
[Rationale]: Ensuring structural truth by synchronizing version badges with the authoritative manifest.

Changes:

• [README.md]: Updated Client version badge from v13.1.0 to v13.3.0.
• [.github/nightly-logs/documentation-readme-coverage.log]: Appended the update record.

Verification:

• [Automated]: Attempted pnpm test. Noted pre-existing environment failures (Node v22 vs v24 requirement and SelectionBar.spec.ts flakiness). Doc changes are non-breaking.
• [Manual/Audit]: Verified the markdown rendering and link integrity of the updated badge.

Log Updates:

• Updated .github/nightly-logs/documentation-readme-coverage.log

CRITICAL: Target Branch for this PR is Nightly.

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PR created automatically by Jules for task 10271878305405854007 started by @AlbiDR

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