fix(web): wait for local projects before opening

[neocody]

Severity: important — Local Folder creation can appear to fail after successfully creating the project, causing confusing duplicate retries.

The command palette creates a local project and immediately tries to open its first thread. On remote or busy environments, the server can accept the create before the project reaches the client projection, so opening fails even though the project now exists. A retry then reports the existing-project invariant instead of recovering.

Wait for the created project to appear in the live client store before opening the thread. If projection still times out, close the palette and explain that the project was created and can be opened after reloading, so users do not retry creation blindly. Concurrent submissions for the same computer and folder are ignored until that attempt finishes.

Addresses the in-app projection sync gap discussed in #5958.

Verification:

• Web typecheck passed.
• Exact v0.0.42 backport: build, typecheck and 49 focused tests passed; isolated full-source Claude review clean.
• Live patched-browser verification: Local Folder creation succeeded on four machines (M1, Linux, Oliver MacBook, RSG-PC), all four persisted after refresh, invalid path showed an error. Creator OS appeared once with four Run on options. Test projects removed through the supported CLI.
• Desktop bundle not updated; upstream test CI has not run while this fork remains unvouched.
• Focused lint passed with four pre-existing warnings.
• Full web unit suite passed: 5,368 tests.
• CodeRabbit incremental review found no actionable comments and confirmed its finding was addressed.
• Bedrock review found no substantive issues on the final head.
• Independent Claude review passed after repairing the isolated proxy configuration; full source context confirmed no substantive findings.
• GitHub Codex review skipped because the reviewer reported its usage limit.

Done by GPT-5.6 Sol in T3 Code via the Codex harness.

Pipeline @ b327bc8: spec-review skipped (trivial) | independent local review ✔ (Claude Sonnet 4.6, isolated tools-disabled process; full source context) | codex review skipped (light lane) | @codex skipped (quota) | coderabbit review ✔ | bedrock review ✔ | tests ✔ (5,368 passed; web typecheck and focused lint)

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ℹ️ Recent review info

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• apps/web/src/components/CommandPalette.tsx

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📝 Walkthrough

Walkthrough

The command palette now prevents duplicate project creation for the same environment and cwd. It waits for the created project projection before opening a new thread and reports projection failures with an error toast.

Changes

Project creation flow

Layer / File(s)	Summary
Projection readiness gate apps/web/src/components/CommandPalette.tsx	The handler tracks in-flight creation keys and releases each key in a finally block. It waits for waitForProject(projectRef). On failure, it shows the error toast and closes the palette. On success, it opens the new thread with projectRef.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Suggested reviewers: maria-rcks

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly summarizes the main change: the web command palette waits for local project availability before opening it.
Description check	✅ Passed	The description clearly explains what changed, why it changed, the timeout behavior, duplicate-submission prevention, and verification results. It does not use the template headings or checklist, and …

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Actionable comments posted: 1

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Inline comments:
In `@apps/web/src/components/CommandPalette.tsx`:
- Line 2250: Add an in-flight guard at the start of
handleAddProjectForEnvironment to prevent duplicate project creation while
waitForProject is pending; return immediately when the same project path is
already being handled, and clear the guard in a finally block so both successful
and rejected waits allow future submissions.

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Reviewing files that changed from the base of the PR and between 1de563c and a92799d.

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• apps/web/src/components/CommandPalette.tsx

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