feat(tui): add vim-like keybinds and settings tab for config edit

src/config.rs

@@ -5,6 +5,7 @@ use std::path::PathBuf;
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AppConfig {
     pub sonarr: SonarrConfig,
+    pub ui: UiConfig,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -13,6 +14,33 @@ pub struct SonarrConfig {
     pub api_key: String,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UiConfig {
+    pub keybind_mode: KeybindMode,
+    pub show_help: bool,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+pub enum KeybindMode {
+    Normal,
+    Vim,
+}
+
+impl Default for KeybindMode {
+    fn default() -> Self {
+        Self::Normal
+    }
+}
+
+impl Default for UiConfig {
+    fn default() -> Self {
+        Self {
+            keybind_mode: KeybindMode::default(),
+            show_help: true,
+        }
+    }
+}
+
 impl Default for AppConfig {
     fn default() -> Self {
         Self {
@@ -20,6 +48,7 @@ impl Default for AppConfig {
                 url: "http://localhost:8989".to_string(),
                 api_key: String::new(),
             },
+            ui: UiConfig::default(),
         }
     }
 }
@@ -92,6 +121,10 @@ impl AppConfig {
                 url: "http://localhost:8989".to_string(),
                 api_key: "your-api-key-here".to_string(),
             },
+            ui: UiConfig {
+                keybind_mode: KeybindMode::Normal,
+                show_help: true,
+            },
         };
 
         let toml_content = toml::to_string_pretty(&sample_config)?;