fix: preserve dots in filenames during handelize

The handelize() regex replaced all non-letter/non-number chars with
dashes, including dots in the filename stem. This mangled session
filenames like "topic-1773595309.753009.md" to "topic-1773595309-753009.md",
breaking memory_get path resolution (file not found on disk).

Fix: add dot to the preserved character class in the filename regex.
After deploying, run qmd-reindex.sh to rebuild indexes with correct paths.

src/store.ts

@@ -1610,7 +1610,7 @@ export function handelize(path: string): string {
         const nameWithoutExt = ext ? segment.slice(0, -ext.length) : segment;
 
         const cleanedName = nameWithoutExt
-          .replace(/[^\p{L}\p{N}$]+/gu, '-')  // Keep route marker "$", dash-separate other chars
+          .replace(/[^\p{L}\p{N}.$]+/gu, '-')  // Keep letters, numbers, dots, "$"; dash-separate rest
           .replace(/^-+|-+$/g, ''); // Remove leading/trailing dashes
 
         return cleanedName + ext;