fix(cli): keep overlap waivers local to marked text (#3464)

* fix(cli): scope overlap waiver to marked text

* fix(skills): guard changelog caption rail

* fix(skills): densify changelog caption checks

* test(skills): satisfy strict seek typing

.agents/skills/changelog-video/SKILL.md

@@ -145,9 +145,10 @@ scaffold.
 
 ### 6 · Gates (all green before presenting)
 
-1. `bun run --cwd packages/cli hyperframes check` (or the installed
+1. `bun run --cwd packages/cli hyperframes check --caption-zone "x0=0;y0=.90;x1=1;y1=1;severity=error;seek=.02,.06,.10,.14,.18,.22,.26,.30,.34,.38,.42,.46,.50,.54,.58,.62,.66,.70,.74,.78,.82,.86,.90,.94,.98"` (or the installed
    `hyperframes` CLI from the repo-local `skills/hyperframes-cli/` skill) —
-   0 errors (contrast: dim text ≥ .66 alpha). Do NOT reach for
+   0 errors (contrast: dim text ≥ .66 alpha; scene content stays above the
+   caption rail). Do NOT reach for
    `npx hyperframes@latest`; the tracked repo-local CLI is the source of
    truth for the composition contract this skill produces against.
 2. `seam-gate.mjs verify` — 0 fail.