chore(cockpit): add missing uv.lock for chat/* + render/* python backends

[blove]

Summary

The cockpit/ag-ui/*, cockpit/langgraph/*, cockpit/deep-agents/*, and examples/* python backends all track a uv.lock, but the cockpit/chat/* (11) and cockpit/render/* (6) families did not — so their backends resolved dependencies unpinned on each uv sync (non-reproducible installs). This surfaced when running the cockpit/chat/subagents e2e generated an untracked uv.lock.

This adds the missing uv.lock for all 17 projects, generated with uv lock (cross-platform resolution — no host-specific bindings), bringing them to parity with their siblings.

Verification

• uv lock succeeded for all 17 (each has a real graph.py backend + pyproject.toml).
• New locks match the sibling format (version = 1, revision = 3, requires-python = ">=3.12"); spot-checked cockpit/chat/subagents resolves langgraph + langchain-openai as declared.

No code changes — lockfiles only.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
threadplane	Ready	Preview, Comment	Jun 20, 2026 3:29pm

[github-actions]

Automated approval: this PR received an intelligent (AI) code review. See the review comments on this PR.

[github-actions]

Claude finished @blove's task in 1m 24s —— View job

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PR Review

• Read CLAUDE.md for repo guidelines
• Review changed files and lockfile contents
• Compare with sibling lockfiles for consistency
• Post findings

---

This PR looks good. Lockfile-only change; no correctness, security, or API concerns.

Spot-checked against the existing cockpit/ag-ui/* and cockpit/langgraph/* sibling lockfiles:

Check	Result
Header format (version = 1, revision = 3, requires-python = ">=3.12")	✅ All 17 match sibling format
Unique project package per lockfile	✅ Each embeds its own project name (e.g. cockpit-chat-subagents, cockpit-render-registry)
Key deps resolved (langgraph>=0.3, langchain-openai>=0.3, langsmith>=0.2)	✅ Present in every lockfile
Cross-platform wheels (Linux, macOS, Windows; x86_64, arm64, aarch64)	✅ No host-specific bindings
No code changes	✅ Lockfiles only

The 17 files cover all missing backends (11 chat/* + 6 render/*), completing parity with their siblings.

[github-actions]

Claude finished @blove's task in 56s —— View job

---

PR Review

• Read CLAUDE.md for repo guidelines
• Review PR diff and lockfile contents
• Compare with sibling lockfiles for consistency
• Post findings

---

This PR looks good — lockfile-only change with no correctness, security, or API concerns.

Spot-checked against the existing cockpit/ag-ui/* sibling lockfiles:

Check	Result
Header format (version = 1, revision = 3, requires-python = ">=3.12")	✅ All 17 match sibling format
Unique project name per lockfile (e.g. cockpit-chat-a2ui, cockpit-render-computed-functions)	✅ All 17 embed the correct name
All 17 lockfiles are distinct (unique content, not copies)	✅ All 17 have distinct hashes
No .gitignore previously suppressing these files	✅ No lockfile exclusion found
No host-specific wheels / cross-platform resolution	✅ Cross-platform wheels present
No code changes	✅ Lockfiles only

The 17 files cover the full gap (11 chat/* + 6 render/*), bringing these backends to parity with their ag-ui/* and langgraph/* siblings. Safe to merge.