Fix path traversal vulnerability and resolve ESLint security warnings

[Copilot]

Summary

Resolved path traversal vulnerability in VideoStreamHandler and eliminated 22 ESLint security warnings through proper validation and configuration updates.

What changed

• Path traversal fix in VideoStreamHandler.ts: Implemented path.relative() validation to prevent directory escape attacks. Constructor and startRecording() now verify paths don't contain .. or absolute paths in relative form, blocking exploits like /app-evil/../../etc/passwd

  // Constructor validation
  const relativePath = path.relative(baseDir, resolvedDir);
  if (relativePath.startsWith('..') || path.isAbsolute(relativePath)) {
    throw new Error('Invalid storage directory: path traversal detected');
  }

• ESLint configuration enhancement: Added missing globals (localStorage, requestAnimationFrame, cancelAnimationFrame, atob, btoa, crypto, Buffer) and removed unnecessary React global

• False positive warnings: Added eslint-disable comments for safe array/object access in MissionPlanner, stripe helpers, AutelDroneSDK, ThermalAnalyzer, and syncQueue (controlled loop indices, TypeScript-validated keys)

• Documentation: Updated VULNERABILITY_ASSESSMENT.md with Phase 3 security hardening details

Testing

• npm audit: 0 vulnerabilities
• ESLint security plugin: 0 warnings (reduced from 22)
• CodeQL: 0 alerts

Security/Compliance

• No secrets committed
• Logging avoids PHI (unless PHI_ENABLED + private endpoints + KV configured)
• Path traversal vulnerability eliminated through robust validation
• All file system operations now validated against directory escape attempts

Screenshots

N/A - Backend security fixes

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[Copilot]

Pull request overview

This PR hardens filesystem usage in the video recording pipeline to eliminate a path traversal vulnerability and aligns ESLint/security tooling by distinguishing real issues from vetted false positives. It also updates the vulnerability assessment documentation to reflect the latest security posture and tooling status.

Changes:

• Enforced directory and file path validation in VideoStreamHandler using path.resolve/path.relative to ensure all recording outputs stay under process.cwd() and share a single validated timestamp.
• Tuned ESLint config (browser/Node globals) and added targeted eslint-disable comments around safe indexed array/object access to clear known false positives from the security plugin.
• Expanded VULNERABILITY_ASSESSMENT.md with Phase 3 hardening details, the path traversal fix, and current scan/CodeQL status.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/utils/syncQueue.ts	Adds a narrow eslint-disable for indexed access when iterating the sync queue, clarifying that the access pattern is controlled and safe.
src/services/VideoStreamHandler.ts	Introduces robust validation for storageDir and per-recording file paths plus guarded fs calls to prevent path traversal while keeping recording behavior intact.
src/services/ThermalAnalyzer.ts	Marks specific indexed accesses on typed arrays and visitation flags as intentional to silence object-injection false positives.
src/services/AutelDroneSDK.ts	Documents safe indexed access for polygon vertices and waypoint arrays to avoid spurious security warnings.
src/lib/stripe.ts	Adds scoped disables for plan lookups by enum key in SUBSCRIPTION_PLANS, clarifying that keys are type-validated, not user-controlled.
src/drone/missions/MissionPlanner.ts	Annotates indexed waypoint access in mission distance calculation as safe, resolving a security plugin false positive.
eslint.config.js	Extends global definitions for common browser APIs and Buffer and clarifies Node/server-side usage to make ESLint’s environment assumptions accurate.
VULNERABILITY_ASSESSMENT.md	Documents the path traversal fix, ESLint security configuration work, affected files, and up-to-date scan/CodeQL results, plus updated security status metadata.

[aurelianware]

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