chore(deps): upgrade major dependencies (ESLint 10, recharts 3, TS 6, Vite 8) (#130)

* chore(deps): upgrade ESLint 9 → 10 with plugin compatibility fixes

- eslint: ^9 → ^10.0.0 (backend + frontend)
- @eslint/js: ^9 → ^10.0.0 (backend + frontend)
- eslint-plugin-react-refresh: ^0.4.24 → ^0.5.2 (ESM, config factory API)
- Update frontend eslint.config.js: destructured import for react-refresh,
  call configs.vite() as factory function (0.5 API change)
- Downgrade new ESLint 10 rules (no-useless-assignment, preserve-caught-error)
  to warnings for existing code patterns
- eslint-plugin-react-hooks stays at 7.0.1 (stable) with --legacy-peer-deps
  until a stable release adds ESLint 10 peer support

* chore(deps): upgrade recharts 2.x to 3.8 with chart.tsx type fixes

recharts 3.x moved Tooltip/Legend props to context-based API.
Updated chart.tsx to use explicit prop interfaces with internal
recharts type imports (LegendPayload, TooltipPayload, TooltipFormatter).

* chore(deps): upgrade TypeScript 5.9 to 6.0

- Remove deprecated baseUrl from frontend tsconfig (paths works standalone in TS 6)
- Add react-is dependency required by recharts 3.x at build time
- Backend and frontend both compile and lint cleanly

* chore(deps): upgrade Vite 7.3 to 8.0 and @vitejs/plugin-react to 6.0

Vite 8 replaces Rollup+esbuild with Rolldown, significantly improving
build speed (~2s vs ~18s). No config changes required.

* fix(ci): add .npmrc with legacy-peer-deps for CI and Docker builds

typescript-eslint@8.x requires typescript <6.0.0 and
eslint-plugin-react-hooks@7.0.1 requires eslint <=9. Until upstream
packages release compatible versions, legacy-peer-deps is needed.

* docs: add logo assets and re-ignore CLAUDE.md

* fix(ci): copy .npmrc into prod-deps Docker stage

The prod-deps stage also runs npm ci with backend/package.json but was
missing the .npmrc needed to bypass peer dep conflicts.

frontend/package.json

@@ -41,8 +41,9 @@
     "radix-ui": "^1.4.3",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
+    "react-is": "^19.2.4",
     "react-use-measure": "^2.1.7",
-    "recharts": "^2.15.4",
+    "recharts": "^3.8.0",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.5.0",
     "tailwindcss-animate": "^1.0.7",
@@ -50,19 +51,19 @@
     "xterm-addon-serialize": "^0.11.0"
   },
   "devDependencies": {
-    "@eslint/js": "^9.39.1",
+    "@eslint/js": "^10.0.1",
     "@tailwindcss/vite": "^4.2.2",
     "@types/node": "^25.5.0",
     "@types/react": "^19.2.7",
     "@types/react-dom": "^19.2.3",
-    "@vitejs/plugin-react": "^5.1.1",
-    "eslint": "^9.39.1",
+    "@vitejs/plugin-react": "^6.0.1",
+    "eslint": "^10.1.0",
     "eslint-plugin-react-hooks": "^7.0.1",
-    "eslint-plugin-react-refresh": "^0.4.24",
+    "eslint-plugin-react-refresh": "^0.5.2",
     "globals": "^17.4.0",
     "tailwindcss": "^4.2.2",
-    "typescript": "~5.9.3",
+    "typescript": "^6.0.2",
     "typescript-eslint": "^8.48.0",
-    "vite": "^7.3.1"
+    "vite": "^8.0.2"
   }
 }