feat(theme): add tool_output color to themes

- Added a `tool_output` color to the `Theme` struct.
- Updated all built-in themes to include the new color.
- Modified the TUI to use the `tool_output` color for rendering tool output.

crates/owlen-mcp-server/src/main.rs

@@ -0,0 +1,175 @@
+use path_clean::PathClean;
+use serde::{Deserialize, Serialize};
+use std::env;
+use std::fs;
+use std::path::{Path, PathBuf};
+use tokio::io::{self, AsyncBufReadExt, AsyncWriteExt};
+
+#[derive(Debug, Deserialize)]
+struct Request {
+    id: u64,
+    method: String,
+    params: serde_json::Value,
+}
+
+#[derive(Debug, Serialize)]
+struct Response {
+    id: u64,
+    result: serde_json::Value,
+}
+
+#[derive(Debug, Serialize)]
+struct ErrorResponse {
+    id: u64,
+    error: JsonRpcError,
+}
+
+#[derive(Debug, Serialize)]
+struct JsonRpcError {
+    code: i64,
+    message: String,
+}
+
+#[derive(Deserialize)]
+struct FileArgs {
+    path: String,
+}
+
+async fn handle_request(req: Request, root: &Path) -> Result<serde_json::Value, JsonRpcError> {
+    match req.method.as_str() {
+        "resources/list" => {
+            let args: FileArgs = serde_json::from_value(req.params).map_err(|e| JsonRpcError {
+                code: -32602,
+                message: format!("Invalid params: {}", e),
+            })?;
+            resources_list(&args.path, root).await
+        }
+        "resources/get" => {
+            let args: FileArgs = serde_json::from_value(req.params).map_err(|e| JsonRpcError {
+                code: -32602,
+                message: format!("Invalid params: {}", e),
+            })?;
+            resources_get(&args.path, root).await
+        }
+        _ => Err(JsonRpcError {
+            code: -32601,
+            message: "Method not found".to_string(),
+        }),
+    }
+}
+
+fn sanitize_path(path: &str, root: &Path) -> Result<PathBuf, JsonRpcError> {
+    let path = Path::new(path);
+    let path = if path.is_absolute() {
+        path.strip_prefix("/")
+            .map_err(|_| JsonRpcError {
+                code: -32602,
+                message: "Invalid path".to_string(),
+            })? 
+            .to_path_buf()
+    } else {
+        path.to_path_buf()
+    };
+
+    let full_path = root.join(path).clean();
+
+    if !full_path.starts_with(root) {
+        return Err(JsonRpcError {
+            code: -32602,
+            message: "Path traversal detected".to_string(),
+        });
+    }
+
+    Ok(full_path)
+}
+
+async fn resources_list(path: &str, root: &Path) -> Result<serde_json::Value, JsonRpcError> {
+    let full_path = sanitize_path(path, root)?;
+
+    let entries = fs::read_dir(full_path)
+        .map_err(|e| JsonRpcError {
+            code: -32000,
+            message: format!("Failed to read directory: {}", e),
+        })?;
+
+    let mut result = Vec::new();
+    for entry in entries {
+        let entry = entry.map_err(|e| JsonRpcError {
+            code: -32000,
+            message: format!("Failed to read directory entry: {}", e),
+        })?;
+        result.push(entry.file_name().to_string_lossy().to_string());
+    }
+
+    Ok(serde_json::json!(result))
+}
+
+async fn resources_get(path: &str, root: &Path) -> Result<serde_json::Value, JsonRpcError> {
+    let full_path = sanitize_path(path, root)?;
+
+    let content = fs::read_to_string(full_path).map_err(|e| JsonRpcError {
+        code: -32000,
+        message: format!("Failed to read file: {}", e),
+    })?;
+
+    Ok(serde_json::json!(content))
+}
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    let root = env::current_dir()?;
+    let mut stdin = io::BufReader::new(io::stdin());
+    let mut stdout = io::stdout();
+
+    loop {
+        let mut line = String::new();
+        match stdin.read_line(&mut line).await {
+            Ok(0) => {
+                // EOF
+                break;
+            }
+            Ok(_) => {
+                let req: Request = match serde_json::from_str(&line) {
+                    Ok(req) => req,
+                    Err(e) => {
+                        let err_resp = ErrorResponse {
+                            id: 0,
+                            error: JsonRpcError {
+                                code: -32700,
+                                message: format!("Parse error: {}", e),
+                            },
+                        };
+                        let resp_str = serde_json::to_string(&err_resp)?;
+                        stdout.write_all(resp_str.as_bytes()).await?;
+                        stdout.write_all(b"\n").await?;
+                        continue;
+                    }
+                };
+
+                let request_id = req.id;
+
+                match handle_request(req, &root).await {
+                    Ok(result) => {
+                        let resp = Response { id: request_id, result };
+                        let resp_str = serde_json::to_string(&resp)?;
+                        stdout.write_all(resp_str.as_bytes()).await?;
+                        stdout.write_all(b"\n").await?;
+                    }
+                    Err(error) => {
+                        let err_resp = ErrorResponse { id: request_id, error };
+                        let resp_str = serde_json::to_string(&err_resp)?;
+                        stdout.write_all(resp_str.as_bytes()).await?;
+                        stdout.write_all(b"\n").await?;
+                    }
+                }
+            }
+            Err(e) => {
+                // Handle read error
+                eprintln!("Error reading from stdin: {}", e);
+                break;
+            }
+        }
+    }
+
+    Ok(())
+}