refactor(SideCar): Improve cache serialization format and cleanup comments

- Updated `DownloadCache::Save` method to serialize JSON with tab-based indentation instead of default spaces, enhancing readability and consistency with project formatting standards
- Removed redundant empty lines in `PlatformTarget` struct documentation
- Deleted obsolete FIX comment about file copy operation since robust copy was previously implemented
- Rebuilt Download.exe and SideCar.exe binaries as a result of source code changes

These changes align with Land's focus on code quality and maintainability in the SideCar component, which handles VS Code extension host provisioning for the Cocoon ecosystem in Path A. The cache serialization improvement ensures consistent formatting while maintaining functional behavior.

Author: NikolaRHristov

Source/Download.rs

@@ -41,8 +41,6 @@ struct PlatformTarget {
 	ArchiveExtension:String,
 
 	/// The official Tauri target triple for this platform (e.g.,
-	///
-	///
 	/// "x86_64-pc-windows-msvc").
 	TauriTargetTriple:String,
 }
@@ -141,12 +139,23 @@ impl DownloadCache {
 	}
 
 	/// Saves the current state of the cache to the `Cache.json` file.
-	/// The JSON is pretty-printed for readability.
+	/// The JSON is pretty-printed with tabs for indentation.
 	fn Save(&self, CachePath:&Path) -> Result<()> {
-		let File =
-			File::create(CachePath).with_context(|| format!("Failed to create cache file at {:?}", CachePath))?;
+		// Create an in-memory buffer to write the serialized JSON to.
+		let mut Buffer = Vec::new();
+
+		// Create a formatter that uses a tab character for indentation.
+		let Formatter = serde_json::ser::PrettyFormatter::with_indent(b"\t");
+
+		// Create a serializer with our custom formatter.
+		let mut Serializer = serde_json::Serializer::with_formatter(&mut Buffer, Formatter);
+
+		// Serialize the `DownloadCache` data into the buffer.
+		self.serialize(&mut Serializer)?;
 
-		serde_json::to_writer_pretty(File, self).with_context(|| "Failed to serialize and write to cache file.")?;
+		// Write the buffer's contents to the actual file on disk.
+		fs::write(CachePath, &Buffer)
+			.with_context(|| format!("Failed to write tab-formatted cache to {:?}", CachePath))?;
 
 		Ok(())
 	}
@@ -461,7 +470,6 @@ async fn ProcessDownloadTask(Task:DownloadTask, Client:Client, Cache:Arc<Mutex<D
 
 	info!("      Installing to: {:?}", Task.DestinationDirectory);
 
-	// *** FIX: Use a robust copy operation for the contents. ***
 	// This is the most reliable method for populating a directory, especially
 	// across drives.
 	let mut Options = FsExtraCopyOptions::new();