refactor: remove unused struct members and methods

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/args.rs

@@ -190,13 +190,3 @@ impl FromStr for KeyValue {
         }
     }
 }
-
-impl KeyValue {
-    pub fn key(&self) -> &str {
-        &self.key
-    }
-    
-    pub fn value(&self) -> &str {
-        &self.value
-    }
-}

src/config.rs

@@ -37,7 +37,6 @@ pub struct Settings {
     pub list_format: Vec<ColumnConfig>,
     pub human_readable: bool,
     pub output_format: Option<String>,
-    pub verbose: u8,
     pub quiet: bool,
     pub force: bool,
     pub server: Option<ServerConfig>,
@@ -46,12 +45,6 @@ pub struct Settings {
     pub digest: Option<String>,
 }
 
-impl Settings {
-    pub fn verbose(&self) -> u8 {
-        self.verbose
-    }
-}
-
 impl Settings {
     /// Create unified settings from config and args with proper priority
     pub fn new(args: &Args, default_dir: PathBuf) -> Result<Self> {

src/modes/server/common.rs

@@ -32,16 +32,6 @@ pub struct AppState {
     pub password_hash: Option<String>,
 }
 
-impl AppState {
-    pub fn password(&self) -> Option<&String> {
-        self.password.as_ref()
-    }
-    
-    pub fn password_hash(&self) -> Option<&String> {
-        self.password_hash.as_ref()
-    }
-}
-
 #[derive(Serialize, Deserialize, ToSchema)]
 #[schema(description = "Standard API response wrapper containing success status, data payload, and error information")]
 pub struct ApiResponse<T> {