fix: resolve all 40 clippy warnings (dead_code, unused_imports, lints)

- Add #[allow(unused_imports)] on pub re-exports used only by lib/tests
- Add #[allow(dead_code)] on public API items unused in binary target
- Fix collapsible_if, redundant_closure, unnecessary_map_or in main.rs
- Prefix unused test variables with underscore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/chat_filter.rs

@@ -9,6 +9,7 @@
 use crate::tdlib::ChatInfo;
 
 /// Критерии фильтрации чатов
+#[allow(dead_code)]
 #[derive(Debug, Clone, Default)]
 pub struct ChatFilterCriteria {
     /// Фильтр по папке (folder_id)
@@ -33,6 +34,7 @@ pub struct ChatFilterCriteria {
     pub hide_archived: bool,
 }
 
+#[allow(dead_code)]
 impl ChatFilterCriteria {
     /// Создаёт критерии с дефолтными значениями
     pub fn new() -> Self {
@@ -147,8 +149,10 @@ impl ChatFilterCriteria {
 }
 
 /// Централизованный фильтр чатов
+#[allow(dead_code)]
 pub struct ChatFilter;
 
+#[allow(dead_code)]
 impl ChatFilter {
     /// Фильтрует список чатов по критериям
     ///

src/app/methods/mod.rs

@@ -13,8 +13,13 @@ pub mod modal;
 pub mod navigation;
 pub mod search;
 
+#[allow(unused_imports)]
 pub use compose::ComposeMethods;
+#[allow(unused_imports)]
 pub use messages::MessageMethods;
+#[allow(unused_imports)]
 pub use modal::ModalMethods;
+#[allow(unused_imports)]
 pub use navigation::NavigationMethods;
+#[allow(unused_imports)]
 pub use search::SearchMethods;

src/app/methods/search.rs

@@ -51,9 +51,11 @@ pub trait SearchMethods<T: TdClientTrait> {
     fn update_search_query(&mut self, new_query: String);
 
     /// Get index of selected search result
+    #[allow(dead_code)]
     fn get_search_selected_index(&self) -> Option<usize>;
 
     /// Get all search results
+    #[allow(dead_code)]
     fn get_search_results(&self) -> Option<&[MessageInfo]>;
 }
 

src/app/mod.rs

@@ -10,6 +10,7 @@ mod state;
 
 pub use chat_filter::{ChatFilter, ChatFilterCriteria};
 pub use chat_state::{ChatState, InputMode};
+#[allow(unused_imports)]
 pub use methods::*;
 pub use state::AppScreen;
 
@@ -107,6 +108,7 @@ pub struct App<T: TdClientTrait = TdClient> {
     /// Время последней отправки typing status (для throttling)
     pub last_typing_sent: Option<std::time::Instant>,
     // Image support
+    #[allow(dead_code)]
     #[cfg(feature = "images")]
     pub image_cache: Option<crate::media::cache::ImageCache>,
     /// Renderer для inline preview в чате (Halfblocks - быстро)
@@ -145,6 +147,7 @@ pub struct App<T: TdClientTrait = TdClient> {
     pub last_playback_tick: Option<std::time::Instant>,
 }
 
+#[allow(dead_code)]
 impl<T: TdClientTrait> App<T> {
     /// Creates a new App instance with the given configuration and client.
     ///