Remove default path prefixes for local mirroring

- Removed hardcoded defaults for ZXDB_FILE_PREFIX and WOS_FILE_PREFIX in
  resolveLocalLink.
- Updated docs/ZXDB.md and example.env to remove mentions of defaults.
- Default behavior is now no prefix stripping if variables are omitted.

Signed-off-by: Junie@lucy.xalior.com

docs/ZXDB.md

@@ -53,7 +53,6 @@ ZXDB_LOCAL_FILEPATH=/path/to/your/zxdb/mirror
 WOS_LOCAL_FILEPATH=/path/to/your/wos/mirror
 
 # Optional: Remote path prefixes to strip from database links before prepending local paths
-# Defaults shown below if omitted:
 ZXDB_FILE_PREFIX=/zxdb/sinclair/
 WOS_FILE_PREFIX=/pub/sinclair/
 ```

example.env

@@ -29,7 +29,6 @@ CDN_CACHE=/mnt/files/zxfiles
 # WOS_LOCAL_FILEPATH=/path/to/local/wos/mirror
 
 # Optional: Path prefixes to strip from database links before local matching.
-# Defaults to "/zxdb/sinclair/" and "/pub/sinclair/" if omitted.
 # ZXDB_FILE_PREFIX=/zxdb/sinclair/
 # WOS_FILE_PREFIX=/pub/sinclair/
 

src/server/repo/zxdb.ts

@@ -117,8 +117,8 @@ export interface EntryFacets {
 function resolveLocalLink(fileLink: string): string | null {
   let localPath: string | null = null;
 
-  const zxdbPrefix = env.ZXDB_FILE_PREFIX || "/zxdb/sinclair/";
-  const wosPrefix = env.WOS_FILE_PREFIX || "/pub/sinclair/";
+  const zxdbPrefix = env.ZXDB_FILE_PREFIX || "";
+  const wosPrefix = env.WOS_FILE_PREFIX || "";
 
   if (fileLink.startsWith(zxdbPrefix) && env.ZXDB_LOCAL_FILEPATH) {
     const sub = fileLink.slice(zxdbPrefix.replace(/\/$/, "").length);