chore: bump version to 1.7.6, extension to 1.0.2

[jackwener]

Summary

• OpenCLI: 1.7.5 → 1.7.6
• Extension: 1.0.1 → 1.0.2

Since 1.7.5:

• feat(cli): add --live and --focus flags for automation window lifecycle #1122 — --live and --focus flags for automation window lifecycle
• docs(skills): restore and upgrade opencli-browser skill #1119 — restore and upgrade opencli-browser skill
• feat(browser): compound expansion + cascading stale-ref + bbox 0.99 dedup #1116 — compound expansion + cascading stale-ref + bbox dedup
• feat(browser): selector-first find + get/click/type/select (A2+A3) #1112 — selector-first find + get/click/type/select
• feat(bilibili): add video command #1110 — bilibili video command
• fix(youtube): fall back to Videos tab when Home tab has no videos #1109 — youtube fallback to Videos tab
• fix(twitter): add 5s network timeout to resolveTwitterQueryId #1106 — twitter query ID timeout fix
• feat(browser): agent-native payload — network bodies, html tree budgets, extract command #1104 — agent-native payload (network bodies, html tree, extract)
• feat(browser): network --filter <fields> for agent-native request discovery #1103 — network --filter for agent-native discovery
• feat(deepseek): add file upload support via --file flag #1093 — deepseek file upload support