fix: Remove #end_conversation tag from personal conversation endings

Fixed issue where personal conversations were closing the entire interaction
instead of returning to mission_hub menu.

The Problem:
- Personal conversation endings had #end_conversation tag before -> mission_hub
- This caused the entire conversation to close when personal chat ended
- Player couldn't access mission_hub menu options after personal conversations

The Fix:
- Removed #end_conversation tags from conversation_end knots in ongoing_conversations
- Personal conversations now return to mission_hub WITHOUT closing
- Player sees mission_hub menu again with all available options
- #end_conversation tag remains ONLY in mission_hub exit options

Correct Flow Now:
1. Player chooses personal conversation topic at mission_hub
2. Has personal conversation
3. Personal conversation ends -> mission_hub (no tag)
4. Player sees mission_hub menu again
5. Player can continue with other options OR choose exit
6. Exit option has #end_conversation -> DONE (closes conversation)

Files modified:
- dr_chen_ongoing_conversations.ink
- netherton_ongoing_conversations.ink
- haxolottle_ongoing_conversations.ink

Recompiled all hub JSON files.

scenarios/ink/dr_chen_ongoing_conversations.ink

@@ -1940,7 +1940,6 @@ Dr. Chen: Peaceful. After years of fighting cyber threats. Just... peace.
         Dr. Chen: Take care. Let me know if you need anything.
 }
 
-#end_conversation
 -> mission_hub
 
 === conversation_end_phase4 ===
@@ -1954,7 +1953,6 @@ Dr. Chen: Peaceful. After years of fighting cyber threats. Just... peace.
         Dr. Chen: Good talking. Be safe.
 }
 
-#end_conversation
 -> mission_hub
 
 
@@ -1969,7 +1967,6 @@ Dr. Chen: Peaceful. After years of fighting cyber threats. Just... peace.
         Dr. Chen: Alright. Good luck out there.
 }
 
-#end_conversation
 -> mission_hub
 
 === conversation_end_phase2 ===
@@ -1983,5 +1980,4 @@ Dr. Chen: Peaceful. After years of fighting cyber threats. Just... peace.
         Dr. Chen: Talk later. Good luck.
 }
 
-#end_conversation
 -> mission_hub

scenarios/ink/haxolottle_ongoing_conversations.ink

@@ -1053,7 +1053,6 @@ Haxolottle: But it's worth checking in with yourself. "Is this useful vigilance
         Haxolottle: And hey... you're becoming a real friend. Within the constraints of Protocol 47-Alpha, but a friend nonetheless.
 }
 
-#end_conversation
 -> mission_hub
 
 // ===========================================

scenarios/ink/netherton_ongoing_conversations.ink

@@ -1743,7 +1743,6 @@ Netherton: The fact that you understand that—that protocols are tools, not rep
         Netherton: Dismissed.
 }
 
-#end_conversation
 -> mission_hub
 
 === conversation_end_phase2 ===
@@ -1757,7 +1756,6 @@ Netherton: The fact that you understand that—that protocols are tools, not rep
         Netherton: That will be all.
 }
 
-#end_conversation
 -> mission_hub
 
 === conversation_end_phase3 ===
@@ -1771,7 +1769,6 @@ Netherton: The fact that you understand that—that protocols are tools, not rep
         Netherton: Dismissed, Agent.
 }
 
-#end_conversation
 -> mission_hub
 
 === conversation_end_phase4 ===
@@ -1785,5 +1782,4 @@ Netherton: The fact that you understand that—that protocols are tools, not rep
         Netherton: That will be all.
 }
 
-#end_conversation
 -> mission_hub