[iuyo5678]

Pages with failed child iframes could never complete cooperate sync because a missing content-script receiver aborted collection for the entire tab. Skip failed child frames and inactive documents, report them in frame_gaps, and repair missing collectors immediately using the existing capture script. Active frames still require coverage; a failed main page remains an error.

Frame diagnostics retain only HTTP(S) origins and paths; other URLs show only their scheme. Malformed URLs use a placeholder without interrupting collection. Repair attempts are shared per current document and removed when the document leaves the tab. The existing WXT entrypoint disposes previous collectors when reinjected; the browser regression now tests that shipped entrypoint, including delayed declared-script startup and extension reload.

Return frame_unobservable and page_load_failed for diagnosed collection failures. When a bounded wait reports temporary unavailability, --settle continues its remaining sync attempts and returns the last real sync error if all three fail. It neither invents a permanent frame failure nor recommends reloading for a temporary wait timeout. Human control retains not_ready, including explicit holds during navigation, and status/wait reports control_policy: null until policy negotiation succeeds.

Validation:

• Extension and CLI unit tests, TypeScript checks, frontend formatting, Rust fmt/clippy, skill validation and production builds passed.
• Real Chrome regressions cover failed child frames under strict and target policies, DOM clicks, evaluate, failed main-page exit codes, delayed declared scripts after repair, and extension reload without refreshing the page. Human input still revokes control after repair.
• The failed-frame regression runs in CI. The reload test waits for the new worker to initialize before querying Chrome APIs.

Fixes #545.