feat: Implement zaaktype-configuratie spec

[rubenvdlinde]

Summary

• Create DurationPicker component with days input, automatic ISO 8601 conversion, and preset buttons (6/8/13/26 weeks for deadlines, 2/4/6 weeks for extensions)
• Replace raw text fields for processingDeadline, serviceTarget, and extensionPeriod with DurationPicker in GeneralTab
• Add active case count warning banner when editing published case types with active cases
• Add warning styling for active case notifications

Specs implemented

• REQ-ZTC-01: Active case count warning when editing published case types
• REQ-ZTC-11: Inline validation feedback (via existing validation + DurationPicker)
• REQ-ZTC-12: Duration picker with presets for processing deadline and extension period

Test plan

• Verify DurationPicker converts days input to ISO 8601 format (e.g., 56 -> P56D)
• Verify preset buttons set the correct duration values
• Verify active ISO value is highlighted in presets
• Verify warning banner appears when editing case type with active cases
• Verify DurationPicker works for all three duration fields

Generated with Claude Code

[github-actions]

Quality Report

Repository	ConductionNL/procest
Commit	5fee09d
Branch	44/merge
Event	pull_request
Generated	2026-03-23 10:41 UTC
Workflow Run	https://github.com/ConductionNL/procest/actions/runs/23433218277

Summary

Group	Result
PHP Quality	FAIL
Vue Quality	FAIL
Security	FAIL
License	FAIL
PHPUnit	SKIP
Newman	SKIP

PHP Quality

Tool	Result
lint	PASS
phpcs	FAIL
phpmd	PASS
psalm	PASS
phpstan	PASS
phpmetrics	PASS

Vue Quality

Tool	Result
eslint	FAIL
stylelint	FAIL

Security

Ecosystem	Result
composer	PASS
npm	FAIL

License Compliance

Ecosystem	Result
composer	PASS
npm	FAIL

composer dependencies (100 total)

Metric	Count
Approved (allowlist)	100
Approved (override)	0
Denied	0

PHPUnit Tests

PHPUnit tests were not enabled for this run.

Integration Tests (Newman)

Newman integration tests were not enabled for this run.

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