feat: enhance password-protected rooms with key commitments and management

- Add key commitment scheme for immediate password verification
- Implement ownership transfer with /transfer command
- Add password change functionality with /pass command
- Include room metadata in initialization messages
- Remove /help command and rename /changepass to /pass
- Make room names tappable to show sidebar
- Remove spaces in person/room counter display
- Update UI to show lock icons and orange colors for protected rooms
- Fix password verification to work with empty rooms
- Add comprehensive tests for new functionality

This update significantly improves the security and usability of
password-protected rooms by allowing immediate verification without
waiting for encrypted messages.

bitchatTests/MessagePaddingTests.swift

@@ -39,9 +39,17 @@ class MessagePaddingTests: XCTestCase {
             XCTAssertTrue(MessagePadding.blockSizes.contains(blockSize) || blockSize == data.count)
             
             let padded = MessagePadding.pad(data, toSize: blockSize)
-            let unpadded = MessagePadding.unpad(padded)
             
-            XCTAssertEqual(unpadded, data)
+            // Check if padding was applied (only if needed padding <= 255)
+            let paddingNeeded = blockSize - data.count
+            if paddingNeeded <= 255 {
+                XCTAssertEqual(padded.count, blockSize)
+                let unpadded = MessagePadding.unpad(padded)
+                XCTAssertEqual(unpadded, data)
+            } else {
+                // No padding applied if more than 255 bytes needed
+                XCTAssertEqual(padded, data)
+            }
         }
     }
     
@@ -53,10 +61,18 @@ class MessagePaddingTests: XCTestCase {
         XCTAssertEqual(blockSize, 2048)
         
         let padded = MessagePadding.pad(largeData, toSize: blockSize)
-        XCTAssertEqual(padded.count, blockSize)
+        // Since padding needed (548 bytes) > 255, no padding is applied
+        XCTAssertEqual(padded.count, largeData.count)
+        XCTAssertEqual(padded, largeData)
         
-        let unpadded = MessagePadding.unpad(padded)
-        XCTAssertEqual(unpadded, largeData)
+        // Test with data that fits within PKCS#7 limits
+        let smallerData = Data(repeating: 0xAA, count: 1800)
+        let paddedSmaller = MessagePadding.pad(smallerData, toSize: 2048)
+        // Padding needed is 248 bytes, which is < 255, so padding should work
+        XCTAssertEqual(paddedSmaller.count, 2048)
+        
+        let unpaddedSmaller = MessagePadding.unpad(paddedSmaller)
+        XCTAssertEqual(unpaddedSmaller, smallerData)
     }
     
     func testInvalidPadding() {