Address review comments: fix Next.js 15+ params handling, validation, and error handling

[Copilot]

Addresses 13 review comments from PR #15 focusing on Next.js 15+ compatibility, input validation, error handling, and user feedback.

API Route Fixes

• Await params Promise in all route handlers (Next.js 15+ requirement)
• Add email validation with format checking and trimming
• Add role validation against allowed values (owner, admin, editor, viewer)

Error Handling & Loading State

• Clear loading state on all error paths in add/remove collaborator flows
• Check response.ok before parsing JSON to handle malformed responses
• Track and alert users when project collaborator loads fail

User Feedback

• Add success messages for collaborator removal operations
• Display warnings when some projects fail to load with specific project names

CI/CD

• Set ESLint continue-on-error: false to enforce code quality

Example of params fix:

// Before
export async function GET(
  request: Request,
  { params }: { params: { id: string } }
) {
  const projectId = params.id

// After
export async function GET(
  request: Request,
  { params }: { params: Promise<{ id: string }> }
) {
  const { id: projectId } = await params

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Project	Deployment	Review	Updated (UTC)
lab68dev-platform	Error		Jan 20, 2026 6:39am
lab68dev-platform-1ds5	Ready	Preview, Comment	Jan 20, 2026 6:39am