feat(ph-ai): research agent

[kappa90]

Problem

New research agent!

Changes

• Implemented a research agent workflow that operates in two phases:
  • Planning phase: Clarifies the user's request, creates a research plan notebook
  • Research phase: Executes the research plan and creates a final report notebook
• Created a mode switching mechanism to transition between planning and research
• Integrated with existing agent infrastructure through a shared loop graph architecture

How did you test this code?

• Still testing

[kappa90]

[!WARNING] This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite. Learn more

• #42909 : 2 dependent PRs (#43062 , #43070 ) 👈 (View in Graphite)
• #42697
• #42696
• #42060
• #42052 : 1 other dependent PR (#42704 )
• #42888
• master

This stack of pull requests is managed by Graphite. Learn more about stacking.

[wiz-7ad640923b[bot]]

Wiz Scan Summary

Scanner	Findings
Vulnerabilities	-
Sensitive Data	1
Secrets	-
IaC Misconfigurations	-
SAST Findings	-
Total	1

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[github-actions[bot]]

Size Change: 0 B

Total Size: 3.52 MB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	3.52 MB

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[posthog-bot]

Visual regression: Storybook UI snapshots updated

Changes: 10 snapshots (10 modified, 0 added, 0 deleted)

What this means:

• Snapshots have been automatically updated to match current rendering
• Next CI run will switch to CHECK mode to verify stability
• If snapshots change again, CHECK mode will fail (indicates flapping)

Next steps:

• Review the changes to ensure they're intentional
• Approve if changes match your expectations
• If unexpected, investigate component rendering

Review snapshot changes →