Update WHITEPAPER.md formatting and regenerate Xcode project

WHITEPAPER.md

@@ -92,21 +92,21 @@ bitchat implements a custom mesh networking protocol over BLE, where each device
 graph TD
     subgraph "Physical Space (e.g., Conference, Protest, Disaster Area)"
         subgraph "Zone A"
-            A1[Alice<br/>📱]
-            A2[Bob<br/>📱]
-            A3[Carol<br/>📱]
+            A1["Alice\n📱"]
+            A2["Bob\n📱"]
+            A3["Carol\n📱"]
         end
         
         subgraph "Zone B"
-            B1[Dave<br/>📱]
-            B2[Eve<br/>📱]
-            B3[Frank<br/>📱]
+            B1["Dave\n📱"]
+            B2["Eve\n📱"]
+            B3["Frank\n📱"]
         end
         
         subgraph "Zone C"
-            C1[Grace<br/>📱]
-            C2[Henry<br/>📱]
-            C3[Iris<br/>📱]
+            C1["Grace\n📱"]
+            C2["Henry\n📱"]
+            C3["Iris\n📱"]
         end
     end
     
@@ -161,8 +161,8 @@ sequenceDiagram
     C->>B: Scan & Connect (Central)
     
     Note over A,C: Communication Phase
-    A<-->B: Bidirectional Communication
-    B<-->C: Bidirectional Communication
+    A<<->>B: Bidirectional Communication
+    B<<->>C: Bidirectional Communication
     
     Note over A: Acts as both<br/>Central & Peripheral
     Note over B: Acts as both<br/>Central & Peripheral
@@ -325,7 +325,7 @@ sequenceDiagram
     Alice->>Bob: Key Exchange Response<br/>(Encrypted with shared secret)
     Note over Bob: Derives shared secret<br/>verifies response
     
-    Alice<-->Bob: Encrypted Communication<br/>(AES-256-GCM)
+    Alice<<->>Bob: Encrypted Communication<br/>(AES-256-GCM)
     
     Note over Alice,Bob: Forward Secrecy Achieved
 ```
@@ -348,10 +348,10 @@ graph LR
     A --> K[256-bit Key]
     K --> AES[AES-256-GCM]
     
-    S[Salt: SHA256(roomName)] --> A
-    I[Iterations: 10] --> A
-    M[Memory: 64MB] --> A
-    T[Parallelism: 4] --> A
+    S["Salt: SHA256(roomName)"] --> A
+    I["Iterations: 10"] --> A
+    M["Memory: 64MB"] --> A
+    T["Parallelism: 4"] --> A
     
     style P fill:#ffccbc
     style A fill:#b3e5fc