chore: bump svelte 5.55.8 -> 5.55.9 (#233)

Patch-level svelte bump.

prettier-plugin-svelte 3.5.2 -> 4.0.0 deferred: 4.0.0 crashes on
`{@const x = arr.length > 0 ? ... : 0}` in SendButton.svelte with
"unknown node type: BinaryExpression" during `prettier --check`.

Refs #232

Co-authored-by: dobby-yivi-agent[bot] <275734547+dobby-yivi-agent[bot]@users.noreply.github.com>

Author: dobby-coder[bot]

package-lock.json

@@ -35,7 +35,7 @@
         "prettier-plugin-svelte": "^3.5.2",
         "rollup": "^4.60.4",
         "sass": "^1.99.0",
-        "svelte": "^5.55.8",
+        "svelte": "^5.55.9",
         "svelte-check": "^4.4.8",
         "svelte-i18n": "^4.0.1",
         "svelte-preprocess": "^6.0.3",