feat: complete agentic ACP workflow and pinned editor tabs

[lulusir]

Types

• [ x ] 🎉 New Features
• 🐛 Bug Fixes
• 📚 Documentation Changes
• 💄 Code Style Changes
• 💄 Style Changes
• 🪚 Refactors
• 🚀 Performance Improvements
• 🏗️ Build System
• ⏱ Tests
• 🧹 Chores
• Other Changes

Summary

• Add durable agentic task and project management for ACP chats, including task targeting, workspace switching, restore/archive states, attention indicators, and task-list controls.
• Improve ACP chat interactions with reusable turn editing, queued turns, draft preservation, mentions/context attachments, cancellation handling, streaming recovery, debug logs, and layout-aware new-chat actions.
• Harden ACP agent lifecycle and capacity behavior, including pool warmup, saturation handling, session recovery, and concurrency safeguards.
• Add pinned editor tabs, covering commands, tab lifecycle behavior, layout integration, and extension API synchronization.
• Expand unit, BDD, and Playwright coverage for ACP chat flows, agentic task workbench behavior, editor tabs, and runtime edge cases.
• Remove obsolete root context documents and keep package-specific context where applicable.

[lulusir]

/next

[codecov]

Codecov Report

❌ Patch coverage is 91.15192% with 53 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.40%. Comparing base (094b998) to head (e3248cd).

Files with missing lines	Patch %	Lines
...rc/browser/acp/agentic-workspace-switch.service.ts	86.36%	25 Missing and 5 partials ⚠️
...e/src/browser/acp/agentic-task-registry.service.ts	93.24%	21 Missing ⚠️
packages/ai-native/src/browser/acp/index.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4767      +/-   ##
==========================================
+ Coverage   53.80%   55.40%   +1.59%     
==========================================
  Files        1756     1762       +6     
  Lines      112220   114271    +2051     
  Branches    24899    25391     +492     
==========================================
+ Hits        60384    63308    +2924     
+ Misses      43026    42221     -805     
+ Partials     8810     8742      -68     

Flag	Coverage Δ
jsdom	48.66% <91.15%> (+1.41%)	⬆️
node	13.81% <0.00%> (+0.05%)	⬆️

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[lulusir]

/next

[lulusir]

/next

[opensumi]

🎉 PR Next publish successful!

3.9.1-next-1784553929.0

[lulusir]

/next

[opensumi]

🎉 PR Next publish successful!

3.9.1-next-1784623944.0

[lulusir]

/next

[opensumi]

🎉 PR Next publish successful!

3.9.1-next-1784643835.0

[lulusir]

/next

[opensumi]

🎉 PR Next publish successful!

3.9.1-next-1784688644.0