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/AdminBlog/Edit.cshtml

@@ -0,0 +1,114 @@
+@model SkyArtShop.Models.BlogPost
+@{
+    Layout = "~/Views/Shared/_AdminLayout.cshtml";
+    ViewData["Title"] = "Edit Blog Post";
+}
+<div class="card">
+    <div class="card-body">
+        <form method="post">
+            <div asp-validation-summary="All" class="text-danger mb-3"></div>
+            <div class="mb-3">
+                <label class="form-label">Title</label>
+                <input class="form-control" name="Title" value="@Model.Title" required />
+            </div>
+            <div class="mb-3">
+                <label class="form-label">Content</label>
+                <textarea class="form-control" name="Content" id="blogContent" rows="15">@Model.Content</textarea>
+            </div>
+            <div class="mb-3">
+                <label class="form-label">Excerpt</label>
+                <textarea class="form-control" name="Excerpt" rows="3">@Model.Excerpt</textarea>
+            </div>
+            <div class="mb-3">
+                <label class="form-label">Featured Image URL</label>
+                <div class="input-group">
+                    <input class="form-control" name="FeaturedImage" id="featuredImageUrl" value="@Model.FeaturedImage" />
+                    <button type="button" class="btn btn-secondary" onclick="uploadFeaturedImage()">Upload</button>
+                </div>
+                <div id="imagePreview" class="mt-2" style="@(string.IsNullOrEmpty(Model.FeaturedImage) ? "display:none;" : "")">
+                    <img src="@Model.FeaturedImage" style="max-width: 200px; max-height: 200px;" />
+                </div>
+            </div>
+            <div class="mb-3">
+                <label class="form-label">Tags (comma separated)</label>
+                <input class="form-control" name="Tags" value="@(Model.Tags != null ? string.Join(", ", Model.Tags) : "")" />
+            </div>
+            <div class="form-check mb-3">
+                <input class="form-check-input" type="checkbox" name="IsPublished" @(Model.IsPublished ? "checked" : "") />
+                <label class="form-check-label">Published</label>
+            </div>
+            <button class="btn btn-primary" type="submit">Save Changes</button>
+            <a class="btn btn-secondary" href="/admin/blog">Cancel</a>
+        </form>
+    </div>
+</div>
+
+@section Scripts {
+<script src="https://cdn.ckeditor.com/ckeditor5/40.1.0/classic/ckeditor.js"></script>
+<script>
+ClassicEditor
+    .create(document.querySelector('#blogContent'), {
+        toolbar: {
+            items: [
+                'heading', '|',
+                'bold', 'italic', 'underline', 'strikethrough', '|',
+                'link', 'blockQuote', '|',
+                'bulletedList', 'numberedList', '|',
+                'outdent', 'indent', '|',
+                'alignment', '|',
+                'insertTable', '|',
+                'fontSize', 'fontColor', 'fontBackgroundColor', '|',
+                'removeFormat', '|',
+                'undo', 'redo', '|',
+                'sourceEditing'
+            ],
+            shouldNotGroupWhenFull: true
+        },
+        heading: {
+            options: [
+                { model: 'paragraph', title: 'Paragraph', class: 'ck-heading_paragraph' },
+                { model: 'heading1', view: 'h1', title: 'Heading 1', class: 'ck-heading_heading1' },
+                { model: 'heading2', view: 'h2', title: 'Heading 2', class: 'ck-heading_heading2' },
+                { model: 'heading3', view: 'h3', title: 'Heading 3', class: 'ck-heading_heading3' },
+                { model: 'heading4', view: 'h4', title: 'Heading 4', class: 'ck-heading_heading4' }
+            ]
+        },
+        fontSize: {
+            options: ['small', 'default', 'big']
+        },
+        table: {
+            contentToolbar: ['tableColumn', 'tableRow', 'mergeTableCells']
+        },
+        htmlSupport: {
+            allow: [{ name: /.*/, attributes: true, classes: true, styles: true }]
+        }
+    })
+    .catch(error => { console.error(error); });
+
+function uploadFeaturedImage() {
+    const input = document.createElement('input');
+    input.type = 'file';
+    input.accept = 'image/*';
+    input.onchange = function(e) {
+        const file = e.target.files[0];
+        const formData = new FormData();
+        formData.append('file', file);
+        fetch('/admin/upload/image', {
+            method: 'POST',
+            body: formData
+        })
+        .then(response => response.json())
+        .then(result => {
+            if (result.success) {
+                document.getElementById('featuredImageUrl').value = result.url;
+                document.getElementById('imagePreview').style.display = 'block';
+                document.getElementById('imagePreview').innerHTML = '<img src="' + result.url + '" style="max-width: 200px; max-height: 200px;" />';
+            } else {
+                alert('Upload failed: ' + result.message);
+            }
+        });
+    };
+    input.click();
+}
+</script>
+}