feat: Add Medication Refill feature with mobile UI improvements (#30)

* feat: Add Medication Refill feature with UI improvements

- Add refill functionality to medications (add packs/loose pills)
- Add refill API endpoint with history tracking
- Add refill section in edit forms (desktop & mobile)
- Add refill modal in medication detail view
- Add refill history display with expand/collapse
- Add schedule lightbox for clicking medication images
- Improve button styling with primary/info/success classes
- Move '+ New entry' button to medication list header
- Lightbox size: 50% desktop, 90% mobile
- Update selectedMed sync after stock changes
- Migrate from schema-sql.ts to Drizzle Kit migrations

* fix: Improve mobile tooltips and refill modal layout

- Center tooltips on screen for mobile devices (fixed position)
- Close tooltips automatically when scrolling on touch devices
- Use click-based tooltip activation instead of hover on mobile
- Fix refill modal buttons to display in two rows on mobile

backend/package.json

@@ -24,7 +24,7 @@
     "@libsql/client": "^0.10.0",
     "argon2": "^0.40.0",
     "dotenv": "^16.4.5",
-    "drizzle-orm": "^0.32.2",
+    "drizzle-orm": "^0.45.1",
     "fastify": "^5.0.0",
     "nodemailer": "^7.0.11",
     "openid-client": "^6.8.1",
@@ -35,6 +35,7 @@
     "@types/nodemailer": "^6.4.21",
     "@types/supertest": "^6.0.2",
     "@vitest/coverage-v8": "^4.0.16",
+    "drizzle-kit": "^0.31.8",
     "supertest": "^7.0.0",
     "tsx": "^4.19.0",
     "typescript": "^5.5.4",