feat: initialize project backend with Sanctum authentication and setup base CSS styles

backend/composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c57754c93ae34ac3b9b716a0fd2f2149",
+    "content-hash": "2295ba8a172679acacecfce701373bfb",
     "packages": [
         {
             "name": "brick/math",
@@ -1335,6 +1335,69 @@
             },
             "time": "2026-04-20T16:07:33+00:00"
         },
+        {
+            "name": "laravel/sanctum",
+            "version": "v4.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/laravel/sanctum.git",
+                "reference": "e3b85d6e36ad00e5db2d1dcc27c81ffdf15cbf76"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/laravel/sanctum/zipball/e3b85d6e36ad00e5db2d1dcc27c81ffdf15cbf76",
+                "reference": "e3b85d6e36ad00e5db2d1dcc27c81ffdf15cbf76",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "illuminate/console": "^11.0|^12.0|^13.0",
+                "illuminate/contracts": "^11.0|^12.0|^13.0",
+                "illuminate/database": "^11.0|^12.0|^13.0",
+                "illuminate/support": "^11.0|^12.0|^13.0",
+                "php": "^8.2",
+                "symfony/console": "^7.0|^8.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^1.6",
+                "orchestra/testbench": "^9.15|^10.8|^11.0",
+                "phpstan/phpstan": "^1.10"
+            },
+            "type": "library",
+            "extra": {
+                "laravel": {
+                    "providers": [
+                        "Laravel\\Sanctum\\SanctumServiceProvider"
+                    ]
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Laravel\\Sanctum\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Taylor Otwell",
+                    "email": "taylor@laravel.com"
+                }
+            ],
+            "description": "Laravel Sanctum provides a featherweight authentication system for SPAs and simple APIs.",
+            "keywords": [
+                "auth",
+                "laravel",
+                "sanctum"
+            ],
+            "support": {
+                "issues": "https://github.com/laravel/sanctum/issues",
+                "source": "https://github.com/laravel/sanctum"
+            },
+            "time": "2026-02-07T17:19:31+00:00"
+        },
         {
             "name": "laravel/serializable-closure",
             "version": "v2.0.12",