Add file operations and UI components for file management application

src/config.rs

@@ -0,0 +1,48 @@
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+
+#[derive(Serialize, Deserialize, Default, Clone)]
+pub struct Config {
+    pub favorites: Vec<String>,
+}
+
+impl Config {
+    fn config_path() -> Option<PathBuf> {
+        dirs::config_dir().map(|d| d.join("tui-fm").join("config.json"))
+    }
+
+    pub fn load() -> Self {
+        if let Some(path) = Self::config_path() {
+            if let Ok(data) = std::fs::read_to_string(&path) {
+                if let Ok(config) = serde_json::from_str::<Config>(&data) {
+                    return config;
+                }
+            }
+        }
+        Config::default()
+    }
+
+    pub fn save(&self) {
+        if let Some(path) = Self::config_path() {
+            if let Some(parent) = path.parent() {
+                let _ = std::fs::create_dir_all(parent);
+            }
+            if let Ok(data) = serde_json::to_string_pretty(self) {
+                let _ = std::fs::write(&path, data);
+            }
+        }
+    }
+
+    pub fn add_favorite(&mut self, path: &str) {
+        let s = path.to_string();
+        if !self.favorites.contains(&s) {
+            self.favorites.push(s);
+            self.save();
+        }
+    }
+
+    pub fn remove_favorite(&mut self, path: &str) {
+        self.favorites.retain(|f| f != path);
+        self.save();
+    }
+}