feat: Add Lawn Care Tips section and improve Dashboard layout

This commit introduces a new "Lawn Care Tips" section to the application and refines the visual layout of the main Dashboard.

**Key Changes:**

*   **Lawn Care Tips Feature:**
    *   Added `LawnCareTip` model with `Title`, `Category`, and `Content` properties.
    *   Defined `TipCategory` enum for better organization (Mowing, Watering, Fertilizing, Weed Control, Aeration, General).
    *   Integrated `LawnCareTip` into `ApplicationDbContext` for database persistence.
    *   Updated `_Layout.cshtml` to include a new "Lawn Tips" navigation link.

*   **Dashboard Layout Fix:**
    *   Refactored `Views/Home/Index.cshtml` to correctly use Bootstrap's grid system by placing the "Log a New Activity" card in its own `div.row`. This resolves the layout issue where the card was appearing immediately after the previous row without proper spacing.
    *   Updated `HomeController` to include a `LastAerationDate` query for the dashboard display.
    *   Modified `DashboardViewModel` to include `LastAerationDate`.

*   **Build/Dependency Updates:**
    *   Added `Microsoft.EntityFrameworkCore.SqlServer` (likely a residue from scaffolding, though SQLite is still primary).
    *   Added `Microsoft.VisualStudio.Web.CodeGeneration.Design` for scaffolding tools.

This enhances the application's functionality by providing a knowledge base and improves the user experience with a cleaner dashboard layout.

Migrations/20250617225541_AddLawnCareTips.Designer.cs

@@ -0,0 +1,72 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using turf_tasker.Data;
+
+#nullable disable
+
+namespace turf_tasker.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    [Migration("20250617225541_AddLawnCareTips")]
+    partial class AddLawnCareTips
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "9.0.6");
+
+            modelBuilder.Entity("turf_tasker.Models.LawnCareEvent", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime>("EventDate")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("EventType")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int?>("MowingPattern")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(500)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("LawnCareEvents");
+                });
+
+            modelBuilder.Entity("turf_tasker.Models.LawnCareTip", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("Category")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Content")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("LawnCareTips");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}