fix(Mountain): Strip file:// scheme from paths in FileSystem effect handlers

Cocoon sends full URIs like `file:///Users/nikola/.land/extensions/...` through FileSystem.ReadFile/WriteFile/ReadDirectory RPC calls. Creating a PathBuf from such strings treats the scheme literally, causing every file operation to 404.

Add `StripFileUriScheme()` helper to strip `file://` or `file:///` prefixes before constructing PathBuf. Apply to all 8 FileSystem operations: ReadFile, WriteFile, ReadDirectory, StatFile, CreateDirectory, Delete, Rename, and Copy.

This fixes the redhat.java extension activation failure (and any other extension that reads its own package.json via the gRPC fs.readFile path) with "Resource not found: file:///...".

Author: NikolaRHristov

Source/Track/Effect/CreateEffectForRequest/FileSystem.rs

@@ -12,6 +12,28 @@ use tauri::Runtime;
 
 use crate::{RunTime::ApplicationRunTime::ApplicationRunTime, Track::Effect::MappedEffectType::MappedEffect};
 
+/// Strip a leading `file://` (or `file:///`) scheme from the incoming path.
+/// Cocoon sends full URIs like `file:///Users/nikola/.land/extensions/...`
+/// through `FileSystem.ReadFile`/`WriteFile`/`ReadDirectory`; `PathBuf` from
+/// such a string treats the scheme literally and every read 404s. Without
+/// this the redhat.java activation (and any other extension that uses the
+/// gRPC fs.readFile path for its own package.json) fails with "Resource not
+/// found: file:///...".
+fn StripFileUriScheme(Input:&str) -> &str {
+	if let Some(Rest) = Input.strip_prefix("file://") {
+		// `file:///Users/...` - the third slash is part of the path, keep it.
+		if Rest.starts_with('/') {
+			return Rest;
+		}
+		// `file://localhost/Users/...` - rarely used, but normalise by
+		// stripping host-up-to-first-slash. Fall through on failure.
+		if let Some(Idx) = Rest.find('/') {
+			return &Rest[Idx..];
+		}
+	}
+	Input
+}
+
 pub fn CreateEffect<R:Runtime>(
 	MethodName:&str,
 	Parameters:Value,
@@ -28,7 +50,7 @@ pub fn CreateEffect<R:Runtime>(
 							return Ok(json!(payload));
 						}
 						let fs_reader:Arc<dyn FileSystemReader> = run_time.Environment.Require();
-						let path = std::path::PathBuf::from(path_str);
+						let path = std::path::PathBuf::from(StripFileUriScheme(path_str));
 						fs_reader
 							.ReadFile(&path)
 							.await
@@ -45,7 +67,7 @@ pub fn CreateEffect<R:Runtime>(
 					Box::pin(async move {
 						let fs_writer:Arc<dyn FileSystemWriter> = run_time.Environment.Require();
 						let path_str = Parameters.get(0).and_then(Value::as_str).unwrap_or("");
-						let path = std::path::PathBuf::from(path_str);
+						let path = std::path::PathBuf::from(StripFileUriScheme(path_str));
 						let content = Parameters.get(1).cloned();
 						let content_bytes = match content {
 							Some(Value::Array(arr)) => {
@@ -70,7 +92,7 @@ pub fn CreateEffect<R:Runtime>(
 					Box::pin(async move {
 						let fs_reader:Arc<dyn FileSystemReader> = run_time.Environment.Require();
 						let path_str = Parameters.get(0).and_then(Value::as_str).unwrap_or("");
-						let path = std::path::PathBuf::from(path_str);
+						let path = std::path::PathBuf::from(StripFileUriScheme(path_str));
 						fs_reader
 							.ReadDirectory(&path)
 							.await
@@ -87,7 +109,7 @@ pub fn CreateEffect<R:Runtime>(
 					Box::pin(async move {
 						let fs_reader:Arc<dyn FileSystemReader> = run_time.Environment.Require();
 						let path_str = Parameters.get(0).and_then(Value::as_str).unwrap_or("");
-						let path = std::path::PathBuf::from(path_str);
+						let path = std::path::PathBuf::from(StripFileUriScheme(path_str));
 						fs_reader
 							.StatFile(&path)
 							.await
@@ -104,7 +126,7 @@ pub fn CreateEffect<R:Runtime>(
 					Box::pin(async move {
 						let fs_writer:Arc<dyn FileSystemWriter> = run_time.Environment.Require();
 						let path_str = Parameters.get(0).and_then(Value::as_str).unwrap_or("");
-						let path = std::path::PathBuf::from(path_str);
+						let path = std::path::PathBuf::from(StripFileUriScheme(path_str));
 						fs_writer
 							.CreateDirectory(&path, true)
 							.await
@@ -121,7 +143,7 @@ pub fn CreateEffect<R:Runtime>(
 					Box::pin(async move {
 						let fs_writer:Arc<dyn FileSystemWriter> = run_time.Environment.Require();
 						let path_str = Parameters.get(0).and_then(Value::as_str).unwrap_or("");
-						let path = std::path::PathBuf::from(path_str);
+						let path = std::path::PathBuf::from(StripFileUriScheme(path_str));
 						let recursive = Parameters.get(1).and_then(Value::as_bool).unwrap_or(false);
 						fs_writer
 							.Delete(&path, recursive, false)
@@ -142,8 +164,8 @@ pub fn CreateEffect<R:Runtime>(
 						let target = Parameters.get(1).and_then(Value::as_str).unwrap_or("");
 						fs_writer
 							.Rename(
-								&std::path::PathBuf::from(source),
-								&std::path::PathBuf::from(target),
+								&std::path::PathBuf::from(StripFileUriScheme(source)),
+								&std::path::PathBuf::from(StripFileUriScheme(target)),
 								true,
 							)
 							.await
@@ -163,8 +185,8 @@ pub fn CreateEffect<R:Runtime>(
 						let target = Parameters.get(1).and_then(Value::as_str).unwrap_or("");
 						fs_writer
 							.Copy(
-								&std::path::PathBuf::from(source),
-								&std::path::PathBuf::from(target),
+								&std::path::PathBuf::from(StripFileUriScheme(source)),
+								&std::path::PathBuf::from(StripFileUriScheme(target)),
 								true,
 							)
 							.await