Support resource content type in MCP tool output

Improvements

• CoreCheck worktree for external_directory permission in subdirectories@dmmulroy
• CoreBump Copilot plugin version
• TerminalAdd clickable navigation to subagent header
• TerminalAdd mouse hover and click support to questions tool@indeep99
• TerminalFix prompt ref initialization to prevent undefined reference errors
• TerminalRefactor event streaming in TUI to use SDK instead of manual RPC subscription
• TerminalFix cursor position when pasting single-line text in TUI@Octane0411
• TerminalAdd mouse hover and click support to autocomplete@kitlangton
• TerminalCopy OAuth URL when device code is unavailable@itskingori
• TerminalFix slash command autocomplete highlighted row jumping@kitlangton
• DesktopAdd image preview support for image attachments in desktop@dbpolito