chore: fix all compiler warnings

Add #[allow(dead_code)] to unused but potentially useful methods:
- config: save()
- filter: apps_only(), active_prefix()
- providers: name(), search(), is_dmenu_mode(), available_providers()
- dmenu: is_enabled()
- uuctl: ServiceState struct
- result_row: ResultRow struct

Prefix unused variables with underscore in main_window.rs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/config/mod.rs

@@ -182,6 +182,7 @@ impl Config {
         Ok(config)
     }
 
+    #[allow(dead_code)]
     pub fn save(&self) -> Result<(), Box<dyn std::error::Error>> {
         let path = Self::config_path().ok_or("Could not determine config path")?;
 

src/filter.rs

@@ -56,6 +56,7 @@ impl ProviderFilter {
     }
 
     /// Default filter: apps only
+    #[allow(dead_code)]
     pub fn apps_only() -> Self {
         Self {
             enabled: HashSet::from([ProviderType::Application]),
@@ -115,6 +116,7 @@ impl ProviderFilter {
     }
 
     /// Get current active prefix if any
+    #[allow(dead_code)]
     pub fn active_prefix(&self) -> Option<ProviderType> {
         self.active_prefix
     }

src/providers/dmenu.rs

@@ -37,6 +37,7 @@ impl DmenuProvider {
         self.enabled = true;
     }
 
+    #[allow(dead_code)]
     pub fn is_enabled(&self) -> bool {
         self.enabled
     }

src/providers/mod.rs

@@ -14,6 +14,7 @@ use fuzzy_matcher::skim::SkimMatcherV2;
 /// Represents a single searchable/launchable item
 #[derive(Debug, Clone)]
 pub struct LaunchItem {
+    #[allow(dead_code)]
     pub id: String,
     pub name: String,
     pub description: Option<String>,
@@ -58,6 +59,7 @@ impl std::fmt::Display for ProviderType {
 
 /// Trait for all search providers
 pub trait Provider: Send {
+    #[allow(dead_code)]
     fn name(&self) -> &str;
     fn provider_type(&self) -> ProviderType;
     fn refresh(&mut self);
@@ -98,6 +100,7 @@ impl ProviderManager {
         manager
     }
 
+    #[allow(dead_code)]
     pub fn is_dmenu_mode(&self) -> bool {
         self.providers
             .iter()
@@ -110,6 +113,7 @@ impl ProviderManager {
         }
     }
 
+    #[allow(dead_code)]
     pub fn search(&self, query: &str, max_results: usize) -> Vec<(LaunchItem, i64)> {
         if query.is_empty() {
             // Return recent/popular items when query is empty
@@ -197,6 +201,7 @@ impl ProviderManager {
     }
 
     /// Get all available provider types (for UI tabs)
+    #[allow(dead_code)]
     pub fn available_providers(&self) -> Vec<ProviderType> {
         self.providers.iter().map(|p| p.provider_type()).collect()
     }

src/providers/uuctl.rs

@@ -9,6 +9,7 @@ pub struct UuctlProvider {
 }
 
 /// Represents the state of a systemd service
+#[allow(dead_code)]
 #[derive(Debug, Clone)]
 pub struct ServiceState {
     pub unit_name: String,

src/ui/main_window.rs

@@ -505,8 +505,8 @@ impl MainWindow {
         let results_list = self.results_list.clone();
         let scrolled = self.scrolled.clone();
         let search_entry = self.search_entry.clone();
-        let current_results = self.current_results.clone();
-        let config = self.config.clone();
+        let _current_results = self.current_results.clone();
+        let _config = self.config.clone();
         let filter = self.filter.clone();
         let filter_buttons = self.filter_buttons.clone();
         let mode_label = self.mode_label.clone();

src/ui/result_row.rs

@@ -2,6 +2,7 @@ use crate::providers::LaunchItem;
 use gtk4::prelude::*;
 use gtk4::{Box as GtkBox, Image, Label, ListBoxRow, Orientation};
 
+#[allow(dead_code)]
 pub struct ResultRow {
     row: ListBoxRow,
 }