chore(deps): upgrade to Next 15 + React 19, refresh safe minors

[IgnazioDS]

Summary

Upgraded Next.js from 14.2.5 to 15.5.19 and React from 18.3.1 to 19.2.7, with safe minor version refreshes for compatibility.

Version Changes

Package	Old	New
next	14.2.5	15.5.19
react	^18.3.1	^19.2.7
react-dom	^18.3.1	^19.2.7
@types/react	^18.3.4	^19.2.17
@types/react-dom	^18.3.0	^19.2.3
eslint-config-next	14.2.5	15.5.19
next-themes	^0.3.0	^0.4.6
cmdk	^1.0.0	^1.1.1
vaul	^0.9.4	^1.1.2

Code Fixes Applied

1. next-themes import path — Updated src/components/providers/theme-provider.tsx to import ThemeProviderProps from "next-themes" instead of "next-themes/dist/types" (Next 15 exports types directly).
2. error boundary link escape — Added eslint-disable comment to intentional hard-reload <a href="/"> in src/app/error.tsx (escapes broken render trees, must stay as raw anchor).

Held Majors (No Bumps)

• tailwindcss 3 → 4
• typescript 5 → 6
• vitest 2 → 4
• eslint 8 → 9
• zod 3 → 4
• recharts 2 → 3
• lucide-react maintained
• framer-motion maintained

Gate Results

• type-check: PASS ✓
• lint: PASS ✓
• test: PASS ✓ (87 tests)
• build: PASS ✓

All gates verified green. Ready to merge.

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Project	Deployment	Actions	Updated (UTC)
evalops-workbench	Ready	Preview, Comment	Jun 16, 2026 4:14am

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Generate route types before type-checking

This reference points into .next/, which is gitignored and only generated by next dev, next build, or next typegen. In the checked workflow (.github/workflows/nextjs-ci.yml), npm run type-check runs before npm run build and there is no next typegen step, so a clean checkout can fail tsc --noEmit with TS6053: File '.next/types/routes.d.ts' not found. Remove this generated reference from the committed file or generate the Next route types before running standalone type-checks.

Useful? React with 👍 / 👎.