feat(tui): slash-command palette with typeahead, list/tree rendering, CI fix, release workflow

[buchenberg]

Changes

Slash-command palette

• Typing /\ in the TUI input now enters command mode with a styled typeahead palette
• Available commands: /help, /clear, /compact, /quit\
• Textinput built-in suggestions handle prefix matching (tab-to-accept, ctrl+n/ctrl+p to cycle)
• Dynamic viewport height adjustment ensures the palette and input are both visible
• /quit\ exits via \ ea.Quit, other commands dispatch through \�xecuteCommand\
• \onCompact\ callback wired for future context compaction support

Lipgloss list/tree rendering for tool results

• Tool results are now forwarded to the TUI (previously invisible)
• \AgentMsg\ gains \ToolResult\ and \ToolResultName\ fields
• \�gent.ToolInfo\ gains \Result\ field populated on second \OnTool\ callback
• Auto-detection of bullet lists (* item, - item) → rendered with lipgloss list
• Auto-detection of file tree patterns (\├──, \└──) → rendered with lipgloss tree
• Plain tool results display as before (dim gray)

CI fix + release workflow

• CI Go version updated from 1.22 → 1.25 to match \go.mod\
• New
  elease.yml\ workflow: triggers on \�*\ tags, builds 5 platform binaries, creates GitHub Release with auto-generated notes

Tests

• 66 total tests, all passing (6 new command mode tests, 16 new list/tree tests)
• \go vet\ and \gofmt\ clean