#7175 improvement(ui): standardize overflow text

Summary

• add one shared fade-overflow primitive with a full-value tooltip
• migrate read-only labels across shared menus, navigation, settings, resources, tables, and workflow UI
• document the platform rule and preserve explicit exceptions for editable, technical, dense, and multiline content

Type of Change

• Improvement

Testing

• 130 EMCN tests and 118 workflow-renderer tests
• app, EMCN, and workflow-renderer type-checks
• lint, block registry validation, and all 36 repository audits

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)