Trim redundant templates copy from release workflow

Templates and frontend assets are embedded in the binary via embed.FS
(Phase 5), so the release archive only needs the binary and config.toml.

Author: imranparuk

.github/workflows/release.yml

@@ -29,9 +29,9 @@ jobs:
         # Create lilmail directory for each platform
         mkdir -p builds/lilmail
 
-        # Copy config and templates to the common lilmail directory
+        # Copy config to the bundle (templates and frontend assets are embedded
+        # in the binary via embed.FS, so they don't need to ship alongside it)
         cp config.toml builds/lilmail/
-        cp -r templates builds/lilmail/
 
         # Linux build
         GOOS=linux GOARCH=amd64 go build -o builds/lilmail/lilmail