style(ui): enforce deterministic Best-Practise standard in frontend documentation

[beginwebdev2002]

Standardized the best-practise repository into a machine-readable knowledge base by enforcing strict documentation protocols:

• Mandatory Metadata Injection: Updated YAML frontmatter to only contain technology, domain, level, version, tags, ai_role, and last_updated.
• Pattern Cycle Enforcement: Ensured every rule strictly follows the four-step cycle (Bad Practice, Problem, Best Practice, Solution). Added missing Problem and Solution blocks where necessary.
• Visual Scannability: Used Emojis in H1-H3 headers and GitHub Callouts for Contexts.
• Type Safety: Replaced 'any' with 'unknown' in Best Practice code blocks.
• Cross-Linking: Added Back to Top navigation anchors.

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PR created automatically by Jules for task 12757762647215237389 started by @beginwebdev2002

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