access: fix incorrect and misleading comments

Fix copy-paste comment errors in SpellBookKeyPressed() that referred to
"inventory" instead of "spellbook", and QuestLogKeyPressed() that said
"character quest log" instead of "quest log". Correct a misleading
FindPath comment in town NPC auto-walk, and update a stale SourceX path
reference in diablo.cpp.

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

Source/controls/accessibility_keys.cpp

@@ -195,7 +195,7 @@ void QuestLogKeyPressed()
 			if (MousePosition.x > 160 && MousePosition.y < GetMainPanel().position.y) {
 				SetCursorPos(MousePosition - Displacement { 160, 0 });
 			}
-		} else if (!CharFlag) { // We opened the character quest log
+		} else if (!CharFlag) { // We opened the quest log
 			if (MousePosition.x < 480 && MousePosition.y < GetMainPanel().position.y) {
 				SetCursorPos(MousePosition + Displacement { 160, 0 });
 			}
@@ -248,11 +248,11 @@ void SpellBookKeyPressed()
 		}
 	}
 	if (!IsLeftPanelOpen() && CanPanelsCoverView()) {
-		if (!SpellbookFlag) { // We closed the inventory
+		if (!SpellbookFlag) { // We closed the spellbook
 			if (MousePosition.x < 480 && MousePosition.y < GetMainPanel().position.y) {
 				SetCursorPos(MousePosition + Displacement { 160, 0 });
 			}
-		} else if (!invflag) { // We opened the inventory
+		} else if (!invflag) { // We opened the spellbook
 			if (MousePosition.x > 160 && MousePosition.y < GetMainPanel().position.y) {
 				SetCursorPos(MousePosition - Displacement { 160, 0 });
 			}

Source/controls/town_npc_nav.cpp

@@ -243,7 +243,7 @@ void UpdateAutoWalkTownNpc()
 		return;
 	}
 
-	// FindPath returns 0 if the path length is equal to the maximum.
+	// FindPath returns 0 when it fails to find a usable path.
 	// The player walkpath buffer is MaxPathLengthPlayer, so keep segments strictly shorter.
 	if (steps < static_cast<int>(MaxPathLengthPlayer)) {
 		const int townerIdx = AutoWalkTownNpcTarget;

Source/diablo.cpp

@@ -168,7 +168,7 @@ GameLogicStep gGameLogicStep = GameLogicStep::None;
 PlayerActionType LastPlayerAction = PlayerActionType::None;
 
 // Controller support: Actions to run after updating the cursor state.
-// Defined in SourceX/controls/plctrls.cpp.
+// Defined in Source/controls/plrctrls.cpp.
 extern void plrctrls_after_check_curs_move();
 extern void plrctrls_every_frame();
 extern void plrctrls_after_game_logic();