accessibility: add semantic section headings to RightSidebar telemetry inspector

[SourabhX16]

Problem Statement

RightSidebar.tsx uses styled <div> tags for section titles ('Orbital Parameters', 'Burn Planner') without heading markup.

Why It Matters

Assistive technology users cannot navigate sidebar panels by heading structure.

Expected Behaviour

Use semantic <h2> and <h3> heading tags for all panel titles in RightSidebar.

Acceptance Criteria

• Panel headers rendered using semantic <h2> and <h3> tags.
• Proper heading hierarchy enforced.
• Screen reader heading navigation verified.

Likely Affected Files / Components

• src/components/RightSidebar.tsx

[mittalsonal]

/assign

[github-actions]

✅ Assigned to @mittalsonal.

You currently have 3/3 active assignments.

Please open a linked pull request within 5 days, otherwise the assignment will be removed automatically.

[mittalsonal]

Linked PR opened: #2130 (ix: add semantic headings to right sidebar). It includes Closes #2082, keeps the visual layout unchanged, and local verification passed (RightSidebar test, typecheck, ESLint, build, and diff check).