Fix: Categories Edit form model binding with explicit attributes

**Issue**: Edit category form not displaying existing values and not updating
- Form fields were empty when loading edit page
- Submitting changes had no effect on the category

**Root Cause**:
- Edit view used asp-for helpers which don't bind properly in production
- Create view used explicit name/id attributes which work reliably
- Model values weren't being rendered in the form fields

**Solution**:
- Changed from asp-for helpers to explicit name/id attributes
- Added value="@Model.Name" to populate name input
- Added @Model.Description between textarea tags
- Changed checkbox to @(Model.IsActive ? "checked" : "")
- Matches the working pattern from Create.cshtml

**Files Changed**:
- LittleShop/Areas/Admin/Views/Categories/Edit.cshtml
  - Line 29: Input with value="@Model.Name"
  - Line 35: Textarea with @Model.Description content
  - Line 41: Checkbox with @(Model.IsActive ? "checked" : "")

**Testing**:
- Deployed to production (container: f86abfb2334b, healthy)
- Form now displays existing category values
- Updates save correctly to database

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

LittleShop/Areas/Admin/Views/Categories/Edit.cshtml

@@ -25,21 +25,21 @@
                     }
                     
                     <div class="mb-3">
-                        <label asp-for="Name" class="form-label">Name</label>
+                        <label for="Name" class="form-label">Name</label>
-                        <input asp-for="Name" class="form-control" />
+                        <input name="Name" id="Name" class="form-control" value="@Model.Name" required />
-                        <span asp-validation-for="Name" class="text-danger"></span>
+                        <span class="text-danger"></span>
                     </div>
 
                     <div class="mb-3">
-                        <label asp-for="Description" class="form-label">Description</label>
+                        <label for="Description" class="form-label">Description</label>
-                        <textarea asp-for="Description" class="form-control" rows="3"></textarea>
+                        <textarea name="Description" id="Description" class="form-control" rows="3">@Model.Description</textarea>
-                        <span asp-validation-for="Description" class="text-danger"></span>
+                        <span class="text-danger"></span>
                     </div>
 
                     <div class="mb-3">
                         <div class="form-check">
-                            <input asp-for="IsActive" class="form-check-input" type="checkbox" />
+                            <input name="IsActive" id="IsActive" class="form-check-input" type="checkbox" @(Model.IsActive ? "checked" : "") />
-                            <label asp-for="IsActive" class="form-check-label">
+                            <label for="IsActive" class="form-check-label">
                                 Active
                             </label>
                         </div>