Add sync error logging, extend error flash, fix unload saves

- Log workforce sync errors to backend stdout so they appear in docker logs
- Extend error flash from 5s to 15s so errors are readable
- Replace sendBeacon (POST-only) with keepalive fetch (PUT) on unload —
  sendBeacon was hitting 404s on all three unload saves

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/lucide-react/package.json

@@ -0,0 +1,72 @@
+{
+  "name": "lucide-react",
+  "description": "A Lucide icon library package for React applications.",
+  "version": "1.24.0",
+  "license": "ISC",
+  "homepage": "https://lucide.dev",
+  "bugs": "https://github.com/lucide-icons/lucide/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/lucide-icons/lucide.git",
+    "directory": "packages/lucide-react"
+  },
+  "keywords": [
+    "Lucide",
+    "React",
+    "Feather",
+    "Icons",
+    "Icon",
+    "SVG",
+    "Feather Icons",
+    "Fontawesome",
+    "Font Awesome"
+  ],
+  "author": "Eric Fennis",
+  "amdName": "lucide-react",
+  "main": "dist/cjs/lucide-react.js",
+  "module": "dist/esm/lucide-react.mjs",
+  "typings": "dist/lucide-react.d.ts",
+  "sideEffects": false,
+  "files": [
+    "dist",
+    "dynamic.js",
+    "dynamic.mjs",
+    "dynamic.mjs.map",
+    "dynamic.d.mts",
+    "dynamic.d.ts",
+    "dynamicIconImports.mjs",
+    "dynamicIconImports.d.ts",
+    "dynamicIconImports.d.mts"
+  ],
+  "devDependencies": {
+    "@testing-library/jest-dom": "^6.8.0",
+    "@testing-library/react": "^14.1.2",
+    "@types/react": "^18.2.37",
+    "@vitejs/plugin-react": "^4.6.0",
+    "jest-serializer-html": "^7.1.0",
+    "react": "18.2.0",
+    "react-dom": "18.2.0",
+    "rollup": "^4.59.0",
+    "rollup-plugin-dts": "^6.2.3",
+    "rollup-plugin-preserve-directives": "^0.4.0",
+    "typescript": "^5.8.3",
+    "vite": "^7.2.4",
+    "@lucide/shared": "1.0.0",
+    "@lucide/build-icons": "1.1.0",
+    "@lucide/rollup-plugins": "1.0.0"
+  },
+  "peerDependencies": {
+    "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+  },
+  "scripts": {
+    "build": "pnpm clean && pnpm copy:license && pnpm build:icons && pnpm typecheck && pnpm build:bundles",
+    "copy:license": "cp ../../LICENSE ./LICENSE",
+    "clean": "rm -rf dist && rm -rf stats && rm -rf ./src/icons/*.ts && rm -f dynamic.{d.ts,d.mts,mts,mjs,mjs.map} && rm -f dynamicIconImports.d.ts",
+    "build:icons": "build-icons --output=./src --templateSrc=./scripts/exportTemplate.mts --renderUniqueKey --withAliases --withDynamicImports --separateAliasesFile --separateAliasesFileIgnore=fingerprint --aliasesFileExtension=.ts --iconFileExtension=.ts --exportFileName=index.ts",
+    "build:bundles": "rollup -c ./rollup.config.mjs",
+    "typecheck": "tsc",
+    "typecheck:watch": "tsc -w",
+    "test": "pnpm build:icons && vitest run",
+    "test:watch": "vitest watch"
+  }
+}