Fix pasteback confirmation and Paste Again feedback

[r3dbars]

Summary

• Keep focus loss sticky through the paste-confirmation window so a focus bounce cannot become neutral feedback or Auto Enter eligibility.
• Treat confirmation-unavailable targets as neutral while showing a one-shot Paste Again action for genuinely unconfirmed paste.
• Emit one aggregate dictation_paste_retry_completed terminal event per user retry with no text, paths, app identity, or duplicate completion event.

Verification

• Independent full-diff review: clean after two earlier findings were fixed.
• bash run-tests.sh: 13,242 passed, 0 failed, exit 0.
• Focused pasteback: 145 passed.
• Analytics policy: 6,213 passed.
• Slow pasteback smoke: 9 passed.
• Signed app build, launch smoke, performance budget, taxonomy, source-list, and diff checks passed.

Proof boundary

Real third-party editor focus bouncing, the Paste Again feel, and live PostHog arrival remain manual UNKNOWN. This stays draft. No release action was taken.

lanes used: Codex=implementation, adversarial review, and final verification; Claude=blocked by private-code export policy; Local=skipped; Windows=skipped.

[r3dbars]

Review repair pushed at cd026b9. Fixed clipboard loss when a pending paste retry is cancelled: retained clipboard content is now restored with ownership guards. Focused ClipboardRestoringTextPasterTests: 147/147 pass. Slow pasteback smoke: 9/9 pass. Independent commit review: clean. Draft remains held for the PR real-editor focus / Paste Again / live telemetry proof.

[r3dbars]

Superseded stale pasteback predecessor; current-main replacement #1564 is now merged.