EDIT MEAL FEATURE - IMPLEMENTED

=== ✅ NEW FEATURE ===

You can now EDIT existing meals!

Click "Edit" button → Modal opens → Make changes → Save

=== HOW IT WORKS ===

1. Click "Edit" button on any meal
2. Modal dialog opens with form
3. All fields pre-filled with current values:
   - Name
   - Description  
   - Type (breakfast/lunch/snack)
   - Prep time
   - Image URL
   - Instructions
4. Change what you want
5. Click "Save" → Modal closes, meal updates
6. Click "Cancel" → Modal closes, no changes

=== SECURITY ===

✅ User isolation enforced:
   - GetMealByID(userID, mealID) verifies ownership
   - Users CANNOT edit others' meals
   - Users CANNOT access others' meal data
   - UPDATE query filters by user_id
   - All queries parameterized (SQL injection safe)

✅ Modal security:
   - Closes on click outside
   - Close button works
   - No data exposed
   - XSS protected (template escaping)

=== UI FEATURES ===

Modal Dialog:
- Semi-transparent overlay
- Centered white box
- All fields editable
- Save button (blue)
- Cancel button (gray)
- Click outside to close
- Clean, professional design

Buttons:
- Edit (orange) - opens modal
- Save (blue) - updates meal
- Cancel (gray) - closes modal

=== WHAT CAN BE EDITED ===

Everything:
- ✅ Name
- ✅ Description
- ✅ Meal type (breakfast/lunch/snack)
- ✅ Prep time
- ✅ Image URL
- ✅ Instructions

=== AFTER SAVE ===

- Modal closes automatically
- Meal card updates instantly
- No page reload (HTMX)
- All changes visible immediately
- Edit button still works

=== CODE CHANGES ===

handlers/meals.go:
- GetEditMealHandler() - shows modal with form
- UpdateMealHandler() - saves changes with security
- Added Edit button to meal cards

main.go:
- /meals/:id/edit route (GET)
- /meals/:id/update route (POST)

static/styles.css:
- Modal overlay styles
- Modal content styles
- Form styles
- Button styles

=== SECURITY CHECKS ===

Edit Modal:
1. Check session (middleware)
2. Get userID from context
3. Verify meal ownership
4. Show form if authorized
5. 404 if not found/unauthorized

Update:
1. Check session (middleware)
2. Get userID from context
3. Verify meal ownership BEFORE update
4. Validate all inputs
5. Validate meal type
6. UPDATE with user_id filter
7. Return 403 if unauthorized

SQL Queries:
- All parameterized
- No string concatenation
- User isolation enforced
- No SQL injection possible

=== READY TO USE ===

✅ Build successful
✅ Security implemented
✅ User isolation working
✅ Modal working
✅ All features preserved

Just restart if needed!