refactor: split app/mod.rs into trait-based architecture (1015→371 lines)

Split monolithic App impl into 5 specialized trait modules:
- methods/navigation.rs (NavigationMethods) - 7 methods for chat navigation
- methods/messages.rs (MessageMethods) - 8 methods for message operations
- methods/compose.rs (ComposeMethods) - 10 methods for reply/forward/draft
- methods/search.rs (SearchMethods) - 15 methods for search functionality
- methods/modal.rs (ModalMethods) - 27 methods for modal dialogs

Changes:
- app/mod.rs: 1015→371 lines (removed 644 lines, -63%)
- Created app/methods/ with 5 trait impl blocks
- Left in app/mod.rs: constructors, get_command, get_selected_chat_id/chat, getters/setters
- 116 functions → 5 trait impl blocks (67 in traits + 48 in core)
- Single Responsibility Principle achieved
- Updated CONTEXT.md with refactoring metrics
- Updated ROADMAP.md: Phase 13 Etap 2 marked as DONE

Phase 13 Etap 2: COMPLETED (100%)

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

ROADMAP.md

@@ -478,7 +478,7 @@
 - Каждый handler отвечает за свою область
 - **Дополнительно:** Исправлен конфликт Ctrl+I → Ctrl+U для профиля
 
-### Этап 2: Уменьшить app/mod.rs (116 функций → traits) [TODO]
+### Этап 2: Уменьшить app/mod.rs (116 функций → traits) [DONE ✅]
 
 **Текущая проблема:**
 - God Object с 116 функциями
@@ -486,58 +486,64 @@
 - Нарушение Single Responsibility Principle
 
 **План:**
-- [ ] Создать `app/methods/` директорию
-- [ ] Создать trait `NavigationMethods`
-  - `next_chat()`, `previous_chat()`
-  - `scroll_up()`, `scroll_down()`
-  - `select_chat()`, `open_chat()`
-  - ~15 методов
-- [ ] Создать trait `MessageMethods`
-  - `send_message()`, `edit_message()`, `delete_message()`
-  - `reply_to_message()`, `forward_message()`
-  - `select_message()`, `deselect_message()`
-  - ~20 методов
-- [ ] Создать trait `ComposeMethods`
-  - `enter_edit_mode()`, `enter_reply_mode()`, `enter_forward_mode()`
-  - `handle_input_char()`, `move_cursor_left()`, `move_cursor_right()`
-  - ~15 методов
-- [ ] Создать trait `SearchMethods`
-  - `start_search()`, `search_next()`, `search_previous()`
-  - `clear_search()`
-  - ~5 методов
-- [ ] Создать trait `ModalMethods`
-  - `show_delete_confirmation()`, `show_emoji_picker()`
-  - `show_profile()`, `close_modal()`
-  - ~10 методов
-- [ ] Оставить в `app/mod.rs` только:
+- [x] Создать `app/methods/` директорию
+- [x] Создать trait `NavigationMethods`
+  - `next_chat()`, `previous_chat()`, `select_current_chat()`, `close_chat()`
+  - `next_filtered_chat()`, `previous_filtered_chat()`, `select_filtered_chat()`
+  - **7 методов**
+- [x] Создать trait `MessageMethods`
+  - `start_message_selection()`, `select_previous/next_message()`
+  - `get_selected_message()`, `start_editing_selected()`, `cancel_editing()`
+  - `is_editing()`, `is_selecting_message()`
+  - **8 методов**
+- [x] Создать trait `ComposeMethods`
+  - `start_reply_to_selected()`, `cancel_reply()`, `is_replying()`, `get_replying_to_message()`
+  - `start_forward_selected()`, `cancel_forward()`, `is_forwarding()`, `get_forwarding_message()`
+  - `get_current_draft()`, `load_draft()`
+  - **10 методов**
+- [x] Создать trait `SearchMethods`
+  - Chat search: `start_search()`, `cancel_search()`, `get_filtered_chats()`
+  - Message search: `enter/exit_message_search_mode()`, `set/get_search_results()`
+  - Navigation: `select_previous/next_search_result()`, query управление
+  - **15 методов**
+- [x] Создать trait `ModalMethods`
+  - Delete confirmation: `is_confirm_delete_shown()`
+  - Pinned: `is/enter/exit_pinned_mode()`, `select_previous/next_pinned()`, getters
+  - Profile: `is/enter/exit_profile_mode()`, navigation, leave_group confirmation
+  - Reactions: `is/enter/exit_reaction_picker_mode()`, `select_previous/next_reaction()`
+  - **27 методов**
+- [x] Оставить в `app/mod.rs` только:
   - Struct definition
-  - Constructor (new, with_client)
-  - Getters/setters для полей
-  - ~30-40 методов
+  - Constructors (new, with_client)
+  - Utilities (get_command, get_selected_chat_id, get_selected_chat)
+  - Getters/setters для всех полей
+  - **~48 методов**
 
 **Структура:**
 ```rust
 // app/mod.rs - только core
+mod methods;
+pub use methods::*;
+
 impl<T: TdClientTrait> App<T> {
     pub fn new() -> Self { ... }
-    pub fn config(&self) -> &Config { ... }
+    pub fn get_command(...) -> Option<Command> { ... }
+    pub fn get_selected_chat_id(&self) -> Option<i64> { ... }
+    // ... getters/setters ...
 }
 
 // app/methods/navigation.rs
-pub trait NavigationMethods {
+pub trait NavigationMethods<T: TdClientTrait> {
     fn next_chat(&mut self);
     fn previous_chat(&mut self);
 }
-impl<T: TdClientTrait> NavigationMethods for App<T> { ... }
-
-// app/methods/messages.rs
-pub trait MessageMethods {
-    async fn send_message(&mut self, text: String);
-}
-impl<T: TdClientTrait> MessageMethods for App<T> { ... }
+impl<T: TdClientTrait> NavigationMethods<T> for App<T> { ... }
 ```
 
-**Результат:** 116 функций → 6 trait impl блоков
+**Результат:** 1015 строк → **371 строка** (удалено 644 строки, -63%)
+- 116 функций → 5 trait impl блоков (67 методов в traits + 48 в core)
+- Каждый trait отвечает за свою область функциональности
+- Соблюдён Single Responsibility Principle ✅
 
 ### Этап 3: Разбить ui/messages.rs (893 → <300 строк) [TODO]