fix(trips): remaining publish-toggle review findings

- resolveTripChild now asserts the resolved page uses the trip template, so a
  non-trip direct child of /trips could never be toggled through this endpoint
  (P3 adversarial).
- apiSend gains an optional timeoutMs (AbortController); trip-publish passes 10s
  so a hung toggle can't leave the switch stuck aria-busy. post-form omits it,
  keeping media uploads unbounded (P2 reliability).
- trips.html.twig reuses trip.html.twig's one-line active-trip slug match
  instead of a bespoke 3-branch OR (P2 maintainability).
- Draft-badge amber is now a --color-draft-accent token shared by the trip and
  journal badges instead of a twice-hardcoded #E0A458 literal (P3).

Rebuilt js/trip-publish.js and js/post/post-form.js (shared api-utils change).
PHP lint clean; trip-publish suite 10/10; post suite unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mpdu3Dt1iVoozHwAMyjrbn

themes/intotheeast/css/tokens.css

@@ -14,6 +14,7 @@
     --color-surface-raised: #2A2720;   /* elevated surfaces: tooltips, hover */
     --color-ink-inverse:    #17171A;   /* text on accent-coloured buttons */
     --color-error:          #c0392b;   /* validation errors, form error status */
+    --color-draft-accent:   #E0A458;   /* warm amber — draft/unpublished badges */
 
     /* ── Glass overlays (paper colour at opacity, for story components) ── */
     --color-paper-glass-low:   color-mix(in srgb, var(--color-paper) 8%, transparent);