Fix MCP regex to handle SSE connection failures

[built-by-as]

Summary

• Updated MCP server regex patterns to recognize SSE connection failures
• Made SSE pattern matching case-insensitive
• Added support for failed connection status symbol (✗)

Problem

The MCP server list parser was only matching servers with successful (✓) or warning (⚠) status. This caused SSE servers with failed connections to be ignored, as shown in:

jira: https://mcp.atlassian.com/v1/see (SSE) - ✗ Failed to connect

Solution

Updated both regex patterns in main.ts:

1. Line 148: MCP server line detection regex
2. Line 220: Server parsing regex

Changes:

• Added ✗ symbol to the status character class
• Made pattern case-insensitive with i flag to handle "SSE", "sse", etc.
• Updated comments to reflect new behavior

Test plan

• Verify failed SSE connections now appear in MCP server list
• Confirm status indicator shows disconnected state
• Test with various case combinations (SSE, sse, Sse)