chore: update dependencies to latest versions within version ranges

Run pnpm update; bumped 21 packages, removed 20. App still typechecks and
passes Biome.

package.json

@@ -60,7 +60,7 @@
 		"react-hook-form": "7.85.0",
 		"resend": "6.20.0",
 		"server-only": "0.0.1",
-		"sharp": "0.35.3",
+		"sharp": "^0.35.3",
 		"sonner": "2.0.8",
 		"tailwind-merge": "3.6.0",
 		"zod": "4.4.3"
@@ -79,7 +79,7 @@
 		"knip": "6.32.2",
 		"lint-staged": "17.3.0",
 		"pino-pretty": "13.1.3",
-		"postcss": "8.5.25",
+		"postcss": "^8.5.26",
 		"tailwindcss": "4.3.3",
 		"tsx": "4.23.5",
 		"typescript": "7.0.2",