Merge branch 'feature/init-name-resolution'

When a script/txt/csv child is renamed by name_for_inst (e.g. "Init" →
"_Init.luau"), the adjacent meta file must follow the same name. All
three callers were using the Roblox instance name to construct the meta
path, producing "Init.meta.json" instead of "_Init.meta.json" — which
collides with the parent directory's "init.meta.json" on
case-insensitive file systems.

Fix by deriving the meta stem from the first dot-segment of the
snapshot path file name, which already holds the resolved name.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/snapshot_middleware/csv.rs

@@ -109,8 +109,13 @@ pub fn syncback_csv<'sync>(
 
         if !meta.is_empty() {
             let parent = snapshot.path.parent_err()?;
+            let meta_stem = snapshot.path
+                .file_name()
+                .and_then(|n| n.to_str())
+                .map(|s| s.split('.').next().unwrap_or(s))
+                .unwrap_or_else(|| new_inst.name.as_str());
             fs_snapshot.add_file(
-                parent.join(format!("{}.meta.json", new_inst.name)),
+                parent.join(format!("{meta_stem}.meta.json")),
                 serde_json::to_vec_pretty(&meta).context("cannot serialize metadata")?,
             )
         }

src/snapshot_middleware/lua.rs

@@ -158,16 +158,13 @@ pub fn syncback_lua<'sync>(
 
         if !meta.is_empty() {
             let parent_location = snapshot.path.parent_err()?;
-            let instance_name = &snapshot.new_inst().name;
-            let slugified;
-            let meta_name = if crate::syncback::validate_file_name(instance_name).is_err() {
-                slugified = crate::syncback::slugify_name(instance_name);
-                &slugified
-            } else {
-                instance_name
-            };
+            let meta_stem = snapshot.path
+                .file_name()
+                .and_then(|n| n.to_str())
+                .map(|s| s.split('.').next().unwrap_or(s))
+                .unwrap_or_else(|| snapshot.new_inst().name.as_str());
             fs_snapshot.add_file(
-                parent_location.join(format!("{}.meta.json", meta_name)),
+                parent_location.join(format!("{meta_stem}.meta.json")),
                 serde_json::to_vec_pretty(&meta).context("cannot serialize metadata")?,
             );
         }

src/snapshot_middleware/txt.rs

@@ -58,8 +58,13 @@ pub fn syncback_txt<'sync>(
 
         if !meta.is_empty() {
             let parent = snapshot.path.parent_err()?;
+            let meta_stem = snapshot.path
+                .file_name()
+                .and_then(|n| n.to_str())
+                .map(|s| s.split('.').next().unwrap_or(s))
+                .unwrap_or_else(|| new_inst.name.as_str());
             fs_snapshot.add_file(
-                parent.join(format!("{}.meta.json", new_inst.name)),
+                parent.join(format!("{meta_stem}.meta.json")),
                 serde_json::to_vec_pretty(&meta).context("could not serialize metadata")?,
             );
         }