fix: Correct conditional syntax in all phase_hub knots across NPC files

Fixed Ink conditional syntax errors in all three NPC ongoing conversation files:

dr_chen_ongoing_conversations.ink:
- phase_2_hub (line 478): Added opening brace and hyphen to first condition
- phase_3_hub (line 917): Added opening brace and hyphen to first condition
- phase_4_hub (line 1343): Added opening brace and hyphen to first condition

netherton_ongoing_conversations.ink:
- phase_1_hub (line 85): Added opening brace and hyphen, fixed double-prefix bug
- phase_2_hub (line 385): Added opening brace and hyphen to first condition
- phase_3_hub (line 770): Added opening brace and hyphen to first condition
- phase_4_hub (line 1211): Added opening brace, hyphen, and proper indentation

haxolottle_ongoing_conversations.ink:
- phase_1_hub (line 93): Added opening brace and hyphen to first condition
- phase_2_hub (line 547): Added opening brace, hyphen, and fixed undefined
  variable reference (missions_together -> total_missions_completed)

All conditionals now follow proper Ink syntax:
{
    - condition:
        content
    - else:
        content
}

story_design/ink/dr_chen_ongoing_conversations.ink

@@ -914,12 +914,13 @@ Dr. Chen: If you ever think I've built something that crosses ethical lines, tel
 
 === phase_3_hub ===
 
-{npc_chen_rapport >= 85:
-    Dr. Chen: {player_name}! *genuine excitement* I've been waiting for you. Got something amazing to show you.
-- npc_chen_rapport >= 75:
-    Dr. Chen: Hey! Perfect timing. Want to brainstorm something together?
-- else:
-    Dr. Chen: Agent {player_name}. What brings you by?
+{
+    - npc_chen_rapport >= 85:
+        Dr. Chen: {player_name}! *genuine excitement* I've been waiting for you. Got something amazing to show you.
+    - npc_chen_rapport >= 75:
+        Dr. Chen: Hey! Perfect timing. Want to brainstorm something together?
+    - else:
+        Dr. Chen: Agent {player_name}. What brings you by?
 }
 
 + {not npc_chen_discussed_dream_projects and npc_chen_rapport >= 80} [Ask about their dream projects]
@@ -1339,12 +1340,13 @@ Dr. Chen: Arrogance in security research gets people hurt. Stay humble. Stay tho
 
 === phase_4_hub ===
 
-{npc_chen_rapport >= 95:
-    Dr. Chen: {player_name}! *lights up* I was just thinking about you. Want to see what we've accomplished together?
-- npc_chen_rapport >= 85:
-    Dr. Chen: Hey partner! Got time to collaborate on something?
-- else:
-    Dr. Chen: {player_name}. What's up?
+{
+    - npc_chen_rapport >= 95:
+        Dr. Chen: {player_name}! *lights up* I was just thinking about you. Want to see what we've accomplished together?
+    - npc_chen_rapport >= 85:
+        Dr. Chen: Hey partner! Got time to collaborate on something?
+    - else:
+        Dr. Chen: {player_name}. What's up?
 }
 
 + {not npc_chen_discussed_future_vision and npc_chen_rapport >= 90} [Ask about their vision for the future]

story_design/ink/haxolottle_ongoing_conversations.ink

@@ -90,10 +90,11 @@ EXTERNAL current_mission_id()           // LOCAL - Current mission identifier
 
 === phase_1_hub ===
 
-{total_missions_completed == 1:
-    Haxolottle: So, we've got some downtime. Want to chat about non-work stuff? Per Regulation 847, personal conversation is encouraged for psychological wellbeing.
-- else:
-    Haxolottle: Got a moment? I could use a break from staring at security feeds.
+{
+    - total_missions_completed == 1:
+        Haxolottle: So, we've got some downtime. Want to chat about non-work stuff? Per Regulation 847, personal conversation is encouraged for psychological wellbeing.
+    - else:
+        Haxolottle: Got a moment? I could use a break from staring at security feeds.
 }
 
 + {not npc_haxolottle_talked_hobbies_general} [Ask what they do for fun]
@@ -543,10 +544,11 @@ Haxolottle: And... *slight smile* ...I have my ridiculous axolotl metaphors. Whe
 
 === phase_2_hub ===
 
-{missions_together == 6:
-    Haxolottle: We've been working together for a while now. Starting to feel like a real partnership. Got time to talk?
-- else:
-    Haxolottle: Hey, Agent. Want to chat for a bit? I could use a break from the technical stuff.
+{
+    - total_missions_completed == 6:
+        Haxolottle: We've been working together for a while now. Starting to feel like a real partnership. Got time to talk?
+    - else:
+        Haxolottle: Hey, Agent. Want to chat for a bit? I could use a break from the technical stuff.
 }
 
 + {not npc_haxolottle_talked_philosophy_change} [Ask how their philosophy has changed over the years]

story_design/ink/netherton_ongoing_conversations.ink

@@ -82,12 +82,13 @@ EXTERNAL current_mission_id()           // LOCAL - Current mission identifier
 
 === phase_1_hub ===
 
-{total_missions_completed == 1:
-    Netherton: Agent {player_name}. I have a few minutes available. Is there something you wish to discuss?
-- npc_npc_netherton_respect >= 60:
-    Netherton: Agent. Your performance has been noted. What can I address for you today?
-- else:
-    Netherton: Agent {player_name}. You have questions?
+{
+    - total_missions_completed == 1:
+        Netherton: Agent {player_name}. I have a few minutes available. Is there something you wish to discuss?
+    - npc_netherton_respect >= 60:
+        Netherton: Agent. Your performance has been noted. What can I address for you today?
+    - else:
+        Netherton: Agent {player_name}. You have questions?
 }
 
 + {not npc_netherton_discussed_handbook} [Ask about the Field Operations Handbook]
@@ -381,12 +382,13 @@ Netherton: Specific areas for development will be addressed in formal performanc
 
 === phase_2_hub ===
 
-{npc_netherton_respect >= 70:
-    Netherton: Agent {player_name}. Your continued excellent performance has been noted. What do you wish to discuss?
-- npc_netherton_respect >= 60:
-    Netherton: Agent. I have time for a brief discussion.
-- else:
-    Netherton: Agent {player_name}. What requires attention?
+{
+    - npc_netherton_respect >= 70:
+        Netherton: Agent {player_name}. Your continued excellent performance has been noted. What do you wish to discuss?
+    - npc_netherton_respect >= 60:
+        Netherton: Agent. I have time for a brief discussion.
+    - else:
+        Netherton: Agent {player_name}. What requires attention?
 }
 
 + {not npc_netherton_discussed_difficult_decisions} [Ask about making difficult command decisions]
@@ -765,12 +767,13 @@ Netherton: But that's the price of command. Acceptable trade for the impact I ca
 
 === phase_3_hub ===
 
-{npc_netherton_respect >= 80:
-    Netherton: Agent {player_name}. *almost warmth* Your continued excellence is appreciated. What's on your mind?
-- npc_netherton_respect >= 70:
-    Netherton: Agent. I have time for a substantive discussion.
-- else:
-    Netherton: Agent {player_name}. What do you need?
+{
+    - npc_netherton_respect >= 80:
+        Netherton: Agent {player_name}. *almost warmth* Your continued excellence is appreciated. What's on your mind?
+    - npc_netherton_respect >= 70:
+        Netherton: Agent. I have time for a substantive discussion.
+    - else:
+        Netherton: Agent {player_name}. What do you need?
 }
 
 + {not npc_netherton_discussed_weight_of_command and npc_netherton_respect >= 75} [Ask about the weight of command]
@@ -1205,12 +1208,13 @@ Netherton: Though I sometimes suspect I only believe that because accepting the
 
 === phase_4_hub ===
 
-{npc_netherton_respect >= 90:
-    Netherton: {player_name}. *uses first name, extremely rare* We should talk.
-- npc_netherton_respect >= 80:
-    Netherton: Agent {player_name}. I value your perspective. What's on your mind?
-- else:
-    Netherton: Agent. I have time.
+{
+    - npc_netherton_respect >= 90:
+        Netherton: {player_name}. *uses first name, extremely rare* We should talk.
+    - npc_netherton_respect >= 80:
+        Netherton: Agent {player_name}. I value your perspective. What's on your mind?
+    - else:
+        Netherton: Agent. I have time.
 }
 
 + {not npc_netherton_discussed_legacy and npc_netherton_respect >= 85} [Ask about his legacy]