Bug: Session reconnection loses scroll position and context

[vultuk]

Description

When reconnecting to an existing session after a disconnect (network issue or browser refresh), the terminal loses its scroll position and sometimes displays garbled output.

Steps to Reproduce

1. Start a session and run commands that produce long output
2. Scroll up to view previous output
3. Refresh the browser or disconnect/reconnect
4. Observe that scroll position is reset to bottom
5. Sometimes output appears duplicated or corrupted

Expected Behavior

• Scroll position should be maintained or restored
• Output buffer should be cleanly restored without corruption
• User should return to the same view they had before disconnecting

Current Behavior

• Terminal always scrolls to bottom on reconnect
• Output sometimes shows ANSI escape sequences or duplicated lines
• User loses their place in the output

Possible Solutions

• Store scroll position in session state
• Implement proper output buffer serialization
• Add option to restore scroll position on reconnect
• Clear and rebuild terminal display on reconnect
• Implement proper ANSI sequence handling in buffer restoration

Environment

• Affects all browsers
• Most noticeable with sessions containing lots of colored output

Priority

Medium - Impacts user experience when working with long-running sessions