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.

Controllers/LawnCareTipController.cs

@@ -0,0 +1,157 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Rendering;
+using Microsoft.EntityFrameworkCore;
+using turf_tasker.Data;
+using turf_tasker.Models;
+
+namespace turf_tasker.Controllers
+{
+    public class LawnCareTipController : Controller
+    {
+        private readonly ApplicationDbContext _context;
+
+        public LawnCareTipController(ApplicationDbContext context)
+        {
+            _context = context;
+        }
+
+        // GET: LawnCareTip
+        public async Task<IActionResult> Index()
+        {
+            return View(await _context.LawnCareTips.ToListAsync());
+        }
+
+        // GET: LawnCareTip/Details/5
+        public async Task<IActionResult> Details(int? id)
+        {
+            if (id == null)
+            {
+                return NotFound();
+            }
+
+            var lawnCareTip = await _context.LawnCareTips
+                .FirstOrDefaultAsync(m => m.Id == id);
+            if (lawnCareTip == null)
+            {
+                return NotFound();
+            }
+
+            return View(lawnCareTip);
+        }
+
+        // GET: LawnCareTip/Create
+        public IActionResult Create()
+        {
+            return View();
+        }
+
+        // POST: LawnCareTip/Create
+        // To protect from overposting attacks, enable the specific properties you want to bind to.
+        // For more details, see http://go.microsoft.com/fwlink/?LinkId=317598.
+        [HttpPost]
+        [ValidateAntiForgeryToken]
+        public async Task<IActionResult> Create([Bind("Id,Title,Category,Content")] LawnCareTip lawnCareTip)
+        {
+            if (ModelState.IsValid)
+            {
+                _context.Add(lawnCareTip);
+                await _context.SaveChangesAsync();
+                return RedirectToAction(nameof(Index));
+            }
+            return View(lawnCareTip);
+        }
+
+        // GET: LawnCareTip/Edit/5
+        public async Task<IActionResult> Edit(int? id)
+        {
+            if (id == null)
+            {
+                return NotFound();
+            }
+
+            var lawnCareTip = await _context.LawnCareTips.FindAsync(id);
+            if (lawnCareTip == null)
+            {
+                return NotFound();
+            }
+            return View(lawnCareTip);
+        }
+
+        // POST: LawnCareTip/Edit/5
+        // To protect from overposting attacks, enable the specific properties you want to bind to.
+        // For more details, see http://go.microsoft.com/fwlink/?LinkId=317598.
+        [HttpPost]
+        [ValidateAntiForgeryToken]
+        public async Task<IActionResult> Edit(int id, [Bind("Id,Title,Category,Content")] LawnCareTip lawnCareTip)
+        {
+            if (id != lawnCareTip.Id)
+            {
+                return NotFound();
+            }
+
+            if (ModelState.IsValid)
+            {
+                try
+                {
+                    _context.Update(lawnCareTip);
+                    await _context.SaveChangesAsync();
+                }
+                catch (DbUpdateConcurrencyException)
+                {
+                    if (!LawnCareTipExists(lawnCareTip.Id))
+                    {
+                        return NotFound();
+                    }
+                    else
+                    {
+                        throw;
+                    }
+                }
+                return RedirectToAction(nameof(Index));
+            }
+            return View(lawnCareTip);
+        }
+
+        // GET: LawnCareTip/Delete/5
+        public async Task<IActionResult> Delete(int? id)
+        {
+            if (id == null)
+            {
+                return NotFound();
+            }
+
+            var lawnCareTip = await _context.LawnCareTips
+                .FirstOrDefaultAsync(m => m.Id == id);
+            if (lawnCareTip == null)
+            {
+                return NotFound();
+            }
+
+            return View(lawnCareTip);
+        }
+
+        // POST: LawnCareTip/Delete/5
+        [HttpPost, ActionName("Delete")]
+        [ValidateAntiForgeryToken]
+        public async Task<IActionResult> DeleteConfirmed(int id)
+        {
+            var lawnCareTip = await _context.LawnCareTips.FindAsync(id);
+            if (lawnCareTip != null)
+            {
+                _context.LawnCareTips.Remove(lawnCareTip);
+            }
+
+            await _context.SaveChangesAsync();
+            return RedirectToAction(nameof(Index));
+        }
+
+        private bool LawnCareTipExists(int id)
+        {
+            return _context.LawnCareTips.Any(e => e.Id == id);
+        }
+    }
+}