Redesign login UI, add theme toggle, refactor user update

- Redesigned login page with two-panel layout and branding
- Added HexaDistro logo and theme toggle to sidebar/header
- Refactored user update: roles via update endpoint, removed assignRole API/controller
- Extended UpdateUserRequest for username, role, password changes
- UserService.UpdateAsync syncs changes with AuthHex, with rollback
- Stock balances client dedupes by itemId-locationId
- Middleware matcher excludes static assets from auth checks
- Improved localStorage clearing for user context
- Added lucide-react for icons
- Minor UI/code cleanups for consistency and UX

distribution_fe/package-lock.json

@@ -21,6 +21,7 @@
         "jspdf": "^4.2.1",
         "jspdf-autotable": "^5.0.9",
         "leaflet": "^1.9.4",
+        "lucide-react": "^1.59.0",
         "next": "16.2.6",
         "next-themes": "^0.4.6",
         "react": "19.2.4",
@@ -8073,6 +8074,21 @@
         "yallist": "^3.0.2"
       }
     },
+    "node_modules/lucide-react": {
+      "version": "1.59.0",
+      "resolved": "https://registry.npmjs.org/lucide-react/-/lucide-react-1.59.0.tgz",
+      "integrity": "sha512-5qgMyyCPU6OvnKpLS2t693+ZtiqA8oaSweWoUows0BLFKFf6V75m4+CptpmohZHpD5IuOVIBXHBBiv2vpLJmtw==",
+      "license": "ISC",
+      "peerDependencies": {
+        "@types/react": "*",
+        "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/magic-string": {
       "version": "0.30.21",
       "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.30.21.tgz",