zagent 0.0.223

• zagent mcp is new: a stdio MCP server (line-delimited JSON-RPC 2.0,
  zero dependencies) that lets any MCP-capable agent call zagent as a
  tool — zagent_turn (the -p headless turn; mode:"plan" is the
  read-only option), zagent_quota, zagent_models, and
  zagent_doctor. Credentials never cross the MCP boundary, tool
  arguments are strictly validated (-32602 on unknown/oversized
  input), and the auto-approve surface is disclosed in mcp --help
  and the README's client-config examples.
• File-changing tool calls render a colored unified diff under their
  transcript row — +/- in success/error colors, @@/---/+++
  faint, the body painted by the file's syntax family — with multi-file
  label rows, head+tail truncation, and /dev/null hunks for new
  files.
• A fold cursor collapses single transcript entries (j/k pick a
  block, o/h/l fold and peek), and a fast-typed or pasted burst
  whose head is a fold letter no longer loses its prefix; /clear
  resets the fold state with the view.
• Repeated model_network_status retry emits refresh one transcript
  row in place — a later emit upgrades the text with the classified
  error — instead of stacking identical network retry n/m lines; the
  idle footer drops stale · N retries/N failed once the turn ends.
• zagent task list on a fresh machine — or with an absent, corrupt,
  or table-less store — prints the empty state instead of a stack
  trace, and the GUI-owned store is opened read-only for listing.
• The main help palette lists login/logout, and | subcommand
  forms repeat their verb (offpeak tools, usage stats) so phantom
  tools/stats entries no longer appear.