Refactor: Centralize nested description reorder logic from ExperienceSection to useSectionManagement

The reorder logic for nested description bullet points in ExperienceSection is implemented directly within the component (lines 230-242). This could be centralized in the useSectionManagement hook for cleaner separation of concerns.

Note: Entry-level reordering already uses the clean onReorderEntry callback pattern. This issue is specific to the nested description bullets within each experience entry.

Proposed Improvement

Introduce a specific callback prop for nested description reordering: onDescriptionReorder?: (experienceIndex: number, oldIndex: number, newIndex: number) => void

The parent hook (useSectionManagement) would encapsulate the state update logic, keeping ExperienceSection more presentational.

Scope

- Affected: ExperienceSection.tsx only
- Not affected: EducationSection.tsx (no nested draggables - already uses clean pattern)

Benefits

- Centralizes state management in hooks
- Makes components more presentational
- Creates a reusable pattern if future sections need nested draggables

References

- PR #205 review comment from gemini-code-assist
- File: resume-builder-ui/src/components/ExperienceSection.tsx (lines 230-242)

The work is in resume-builder-ui/src/components/ExperienceSection.tsx, specifically lines 230-242. Start by reading the existing reorder logic there and the useSectionManagement hook to understand the state management pattern. The goal is to extract the nested description reorder logic into the hook, creating a new callback prop `onDescriptionReorder` for the component. Check PR #205 for context. Verify the change by ensuring the drag-and-drop functionality for description bullet points still works.

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