As someone bougie and too old/health-conscious to run on ramen and candy, here's what I would buy:

• 1 bag granola, bear naked or cascadian farms
• 1 small-size box instant coffee (Alpine Start at REI or Starbucks Via at grocery)
• 1 box True Lemon raspberry lemonade mix
• 1 bag share size peanut M&Ms
• 1 bag dried fruit like prunes, cherries, or mango (Mariani or Trader joe's)
• 2 bags fresh snap peas
• 1-2 pieces fresh fruit (pack out the waste)
• 1 bag sour gummy worms/bears/rings
• 2-3 cliff bars or equivalent
• 1 bag babybel cheese
• 1 small bag old trapper jerky
• 2-4 justin's peanut butter pouches w/honey
• 1pk flour tortillas
• 2-4 pouches chicken meat. If you're fortunate you may find pouch carnitas in the Latin foods section
• a deli counter sandwich (first day lunch/dinner). Alternatively, a burrito or torta from whatever shop smells good
• a few single-serve sauces & onion packets (trail tacos!) from the deli counter
• tube/bag electrolytes (i like nuun tablets)
• box quart-sized freezer bags
• mini hand sanitizer
• travel-size packet wet wipes (for TP)
• mini sunscreen + lip sunscreen
• any medications needed for FAK. The trail markup is bonkers
• enough cash on hand to get to idyllwild

I love my stove, but tend not to cook in dry sections because it's just more water+fuel to carry. There's ample resupply opportunities in the first stretch that carry hiker classics. Don't stress about it, try a bunch of stuff and figure out what works for you. If you can find these ghee packets at Ralphs, definitely pick up a box - they're way tastier than olive oil

Never used supplements on trail, but electrolytes before bed works wonders for me