Loki Mode v7.86.0

The trust story, made visible (honestly)

The Evidence Receipt shipped in v7.85.0; this release surfaces it so a reader can
see the trust differentiator without digging, and re-verify any of it themselves.

• Honest verified-counter: a new GET /api/proofs/summary aggregates the project's
  Evidence Receipts into {total, verified, with_gaps, not_verified, unknown},
  computed ONLY from the deterministic honesty headline. A v1.0 receipt with no
  headline is counted as unknown, never as verified. Empty means zero, shown
  honestly. The dashboard shows a small header badge from this (and nothing when
  there are no receipts) -- it reflects real receipts, never an invented number.
• Positioning: README and SKILL now describe the trust layer plainly -- Loki does
  not call work done until it is verified, and every build produces an Evidence
  Receipt you can re-check with loki proof verify. The claim is specific and
  true (honesty-of-done, independently re-verifiable); it does not claim the
  generated code is bug-free.

No new product capability beyond v7.85.0 -- this makes the existing one legible.