Fix admin route access and backend configuration

- Added /admin redirect to login page in nginx config
- Fixed backend server.js route ordering for proper admin handling
- Updated authentication middleware and routes
- Added user management routes
- Configured PostgreSQL integration
- Updated environment configuration

Sky_Art_shop/Views/AdminPortfolio/Projects.cshtml

@@ -0,0 +1,58 @@
+@model List<SkyArtShop.Models.PortfolioProject>
+@{
+    Layout = "~/Views/Shared/_AdminLayout.cshtml";
+    ViewData["Title"] = "Portfolio Projects";
+    var categories = ViewBag.Categories as List<SkyArtShop.Models.PortfolioCategory> ?? new();
+    var selected = ViewBag.SelectedCategory as string;
+}
+<div class="card mb-3">
+    <div class="card-body d-flex justify-content-between align-items-center">
+        <h5 class="mb-0">Projects</h5>
+        <a class="btn btn-primary" href="/admin/portfolio/project/create">Create Project</a>
+    </div>
+</div>
+<div class="card">
+    <div class="card-body">
+        <form method="get" class="row g-2 mb-3">
+            <div class="col-auto">
+                <select name="categoryId" class="form-select" onchange="this.form.submit()">
+                    <option value="">All Categories</option>
+                    @foreach (var c in categories)
+                    {
+                        <option value="@c.Id" selected="@(selected == c.Id ? "selected" : null)">@c.Name</option>
+                    }
+                </select>
+            </div>
+            <div class="col-auto">
+                <a class="btn btn-secondary" href="/admin/portfolio/projects">Reset</a>
+            </div>
+        </form>
+        <table class="table table-striped">
+            <thead>
+            <tr>
+                <th>Title</th>
+                <th>Category</th>
+                <th>Order</th>
+                <th>Actions</th>
+            </tr>
+            </thead>
+            <tbody>
+            @foreach (var p in Model)
+            {
+                var catName = categories.FirstOrDefault(c => c.Id == p.CategoryId)?.Name ?? "-";
+                <tr>
+                    <td>@p.Title</td>
+                    <td>@catName</td>
+                    <td>@p.DisplayOrder</td>
+                    <td>
+                        <a class="btn btn-sm btn-secondary" href="/admin/portfolio/project/edit/@p.Id">Edit</a>
+                        <form method="post" action="/admin/portfolio/project/delete/@p.Id" class="d-inline" onsubmit="return confirm('Delete this project?');">
+                            <button class="btn btn-sm btn-danger" type="submit">Delete</button>
+                        </form>
+                    </td>
+                </tr>
+            }
+            </tbody>
+        </table>
+    </div>
+</div>