[STORY] Issue Detail Panel (Slide-over)

## User Story
*As a developer, I want to see the full context of a PII violation, so that I can understand how to fix it.*

## Epic
**Related Epic**: #

## Acceptance Criteria
- [ ] Slide-over panel from right
- [ ] Shows full context (file path, line number, surrounding code)
- [ ] Masked PII preview (e.g., John S***h)
- [ ] Remediation suggestions
- [ ] Copy-to-clipboard for file path

## Technical Details
- shadcn/ui Sheet component (customized)
- Framer Motion for slide animation
- Syntax highlighting for code snippets

## Estimate
**Story Points**: 5

Start by locating the issue-detail entry point and the existing shadcn/ui Sheet setup. Review how Framer Motion and code syntax highlighting are used before implementing the right-side panel. Done means the panel shows the file path, line number, surrounding code, masked PII, remediation suggestions, and a copyable file path.

由索引模型根據 Issue 內容生成。