Airframe theme-v6

Airframe for agents: the parts a person needs to work with an agent, from the design team's research, audit and Tower
streams and Sean's decisions of October 17. No token values change; no existing class changes its look except where noted.

• New published file airframe.js (copied from airframe/js/airframe.js by the build): one ES module, no dependencies,
  no build step, no Web Components. Markup helpers that match the contracts with every value escaped: status, icon,
  meta, btn, avatar, obj, tag, el. Behaviours: toast(msg, {tone, action, timeout, critical}),
  confirm({title, body, ok, cancel, danger, inspect}) returning Promise<boolean> on an af-dialog, and
  drawer.open/close/toggle with Escape, focus return and an inert page. Alert inhibition: while an af-dialog or
  af-drawer is open, or a text field has focus, non-critical toasts are held and shown afterwards (inhibited(), flush()).
• airframe-components.css gains two stylesheets, agents.css and patterns.css, and these classes:
  • ApprovalCard v2: af-approval__reason (deny with a required reason: an af-field with af-input--area and an
    af-field__error carrying the failed mark and words), af-approval__edit and af-approval--editing (the arguments
    become editable; the primary reads "Approve edited"), af-approval__hint (what "Approve for this session" grants and for
    how long), af-approval__quorum and af-approval__signed (signer avatars, "1 of 2 signed"), af-approval--waiting
    (waiting on others: the queued ring and words, no lit ring, no primary), af-verdict__ok (approved is a quiet check and
    a word) and af-verdict__why (a denial carries its reason). The action row wraps.
  • Question: af-question, af-question__q, __ctx, __opts, __free, __act; the approval role with the word
    "Needs input"; free text dismisses the option chips through :has().
  • Composer: af-composer, af-composer__queued ("Queued · applies after this tool call" with a take-back),
    __qmsg, __box, __input, __row, __chips, __send, __why; is-disabled says why.
  • Diff: af-diff, af-diff__file, __path, __stat, __add, __del, __tools, __hunk, __hunk--failed, __hh,
    __line, __line--ctx|add|del, __n, __s, __code, __cmt, __more, __thread, __note; af-comment,
    af-comment__who, __name, __time, __text. Greyscale: additions in fg with a 2px fg gutter bar, deletions in
    fg-muted with a 2px line-strong bar, context in fg-subtle; the only color is the failed triangle on the hunk a
    failing test points at.
  • Avatar: af-avatar--person|agent|firm, af-avatar--22|28|44, af-avatar--pending, af-avatars, af-avatars__more,
    af-who, af-who__name, __sub. People round, agents hexagonal (clip-path, with a forced-colors edge and a
    no-clip-path square fallback), firms square. The plain af-avatar (the nav's account button) is unchanged except that
    its pointer cursor and hover now apply only to a button or a.
  • ObjectChip: af-obj, af-obj--link, af-obj--restricted, af-obj__key, __title, __state (with
    af-status--approval for the one color a chip may carry), af-obj__trust, af-objs.
  • Button: af-btn--text, sentence-case Red Hat Text 13.5 px (13 small); the rule "friendlier where people read, mono
    where data is" is in the Button README.
  • Controls: af-input--area (a textarea in the input well), af-input--sans, af-field__error, af-chip,
    af-chip--mono, af-chip--sm, af-chips; af-id no longer wraps.
  • Patterns (new dsCard group): PageHeader af-page-head, af-page-head--s, --rule, __text, __title, __lede,
    __sum, __actions; EmptyState af-empty[data-kind], af-empty--clear, --compact, __title, __text,
    __counts, __act, __body; Toast af-toasts, af-toasts--inline, af-toast, af-toast--bad, __msg, __act,
    is-leaving; Dialog af-dialog, af-dialog--wide, --danger, __form, __head, __title, __body, __foot;
    Drawer af-scrim, af-drawer, af-drawer--right|bottom, __head, __title, __body, __foot, __grip, and the
    is-open state; layer variables --af-z-scrim 100, --af-z-drawer 110, --af-z-toast 120, sizes --af-drawer-w
    480px, --af-drawer-h 40vh, --af-drawer-inset (set through html.af-drawer-open--bottom).
  • Forced colors: every new part keeps its edges and marks in system colors (gutter bars and the hexagon edge in
    CanvasText, pressed chips in Highlight, the diff and chips as outlines).
• registry.json: new items helpers (airframe.js), approval-card, question, composer, diff, avatar,
  object-chip, page-header, empty-state, toast, dialog, drawer; the skill lists every component.
• Brand book: guide/Status.md adds "A question is not an approval, but it is the same role", "Waiting on others stays
  grey", "Alert inhibition" and the Carbon and Airbus ECAM sources; guide/brand.md adds "Who has the controls" (Agent has
  control, grey; You have control, brand) and the avatar triad; guide/Data.md adds the greyscale diff rule and objects by
  reference. The command palette is deferred to theme-v7.