Implement: Case Management

[rubenvdlinde]

OpenSpec Change: case-management

Spec path: openspec/changes/case-management

Generated from Specter (33 features).

[rubenvdlinde]

Hydra Builder — Implementation Complete

The case-management feature implementation is ready for review.

Pull Request: #243

Completed Tasks:

• Add filter controls to CaseList.vue (priority, handler, overdue)
• Add search functionality to CaseList.vue
• Integrate CustomPropertiesPanel component
• Integrate DocumentChecklist component
• Enhance caseValidation.js error messages

All implementations follow Conduction architectural patterns and ADR-017 component composition rules. The changes are backward-compatible and improve the case management user experience.