✨ refactor: streamline SSR setup and remove Babel configuration

- Updated import path for app.server module in SSR hook.
- Removed babel.config.server.json as Babel is no longer needed for async/await transformation.
- Adjusted esbuild configuration to target ESNext and modified output paths.
- Enhanced App.svelte to handle initial content loading during SSR.
- Updated SSR script to load messages synchronously before rendering.
- Simplified build:server script in package.json by removing Babel step.

api/hooks/clear_cache.js

@@ -5,7 +5,18 @@ var utils = require("./lib/utils")
     const collectionName = col && col.name ? col.name : null
     const req = context.request()
     const method = req.method
-    const entryId = (context.data && !Array.isArray(context.data) && context.data.id) || req.param("id") || null
+    const data = /** @type {Record<string, any>} */ (Array.isArray(context.data) ? {} : context.data || {})
+    let entryId = data.id || req.param("id") || null
+
+    // DELETE hooks may not populate context.data.id or route params consistently.
+    if (!entryId) {
+        const path = req.path
+        const segments = path.split("/")
+        const last = segments[segments.length - 1]
+        if (last && last.length >= 24) {
+            entryId = last
+        }
+    }
 
     utils.clearSSRCache(collectionName, entryId, method)
 })()