fix: wire TOGGLE_CHARACTER_SCREEN (C) and TOGGLE_BAGS (B) keybindings

Both actions were defined in KeybindingManager but never wired to the
input handling block — C had no effect and B did nothing. Connect them:
- C toggles inventoryScreen's character panel (equipment slots view)
- B opens all separate bags, or falls back to toggling the unified view

src/ui/game_screen.cpp

@@ -2157,11 +2157,23 @@ void GameScreen::processTargetInput(game::GameHandler& gameHandler) {
             }
         }
 
-        // Toggle nameplates (customizable keybinding, default V)
+        // Toggle character screen (C) and inventory/bags (I)
+        if (KeybindingManager::getInstance().isActionPressed(KeybindingManager::Action::TOGGLE_CHARACTER_SCREEN)) {
+            inventoryScreen.toggleCharacter();
+        }
+
         if (KeybindingManager::getInstance().isActionPressed(KeybindingManager::Action::TOGGLE_INVENTORY)) {
             inventoryScreen.toggle();
         }
 
+        if (KeybindingManager::getInstance().isActionPressed(KeybindingManager::Action::TOGGLE_BAGS)) {
+            if (inventoryScreen.isSeparateBags()) {
+                inventoryScreen.openAllBags();
+            } else {
+                inventoryScreen.toggle();
+            }
+        }
+
         if (KeybindingManager::getInstance().isActionPressed(KeybindingManager::Action::TOGGLE_NAMEPLATES)) {
             showNameplates_ = !showNameplates_;
         }