fix(web): attach SnapShots to the open question instead of the hidden composer

[Gigioxx]

Problem

While a provider question is pending, the composer stages attachments in a per-question draft, so drag-and-drop lands beside the answer. The SnapShot coordinator still delivered captures to the thread draft, so a shortcut capture taken during a question was invisible until the question was submitted.

Change

ChatComposer registers the open question draft (same gate as the attach button, and only while the answer is not sending) in a small registry in questionAttachments.ts, along with the other question drafts of the same request. SnapShotCoordinator pins that question per capture when the capture is first seen, so the animation and the delivery agree. If the pinned question is no longer open at delivery, the capture falls back to the thread draft instead of a newer question. Delivery uses addImages because addImage refuses drafts without a thread session, which a question draft never has. It also checks the shared attachment limit across all questions of the request, like drag-and-drop does. Pending SnapShot animations in the composer are keyed by the attachment target, so the flying capture lands on the tile inside the question strip.

Scope and approval

Fixes #12271, triaged by a maintainer here: #12271 (comment)

Verification

• Reproduced and verified in the web app against a real Claude thread with AskUserQuestion open, using a stubbed desktopBridge to enqueue a capture. Before, the capture went to the hidden thread draft. After, it showed in the question strip, the answer submitted with the capture attached, and Claude described the image.
• vp test run --project unit src/components/desktop/SnapShotCoordinator.test.ts in apps/web: 18 passed. Covers delivery into the open question draft, falling back when the question closes, keeping a capture on the question it was pinned to, and refusing a capture once other questions of the request use the shared limit.
• tsc --noEmit in apps/web exits clean. vp lint on the touched files reports no errors.
• Not checked: the desktop overlay animation itself, since this ran in a web build with a stubbed bridge.

Before, capture delivered but nothing shown in the question:

After, capture shows in the question strip:

Written by Claude Opus 5 in Claude Code via T3 Code. Review follow-ups by Claude Opus 5.5 in Claude Code.

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This patch changes the production snapshot-delivery path across the composer, desktop coordinator, and shared question-draft state, with asynchronous target and attachment-limit interactions. The supplied findings identify unresolved risks around animation destinations, question-target reuse, and attachment-cap enforcement.

Not approved because:

• 3 blocking correctness issues found at or above your repo's Minimum Blocking Severity

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Reviewing files that changed from the base of the PR and between dd1e41d and 1997dce.

📒 Files selected for processing (4)

• apps/web/src/components/chat/ChatComposer.tsx
• apps/web/src/components/desktop/SnapShotCoordinator.test.ts
• apps/web/src/components/desktop/SnapShotCoordinator.tsx
• apps/web/src/questionAttachments.ts

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📝 Walkthrough

Walkthrough

The chat composer tracks eligible question attachment drafts by scoped thread. Snapshot captures are pinned to their question draft and delivered there when the draft remains open. Delivery checks the shared request attachment limit.

Changes

Open question snapshot routing

Layer / File(s)	Summary
Question attachment draft tracking apps/web/src/questionAttachments.ts, apps/web/src/components/chat/ChatComposer.tsx	The composer tracks eligible question drafts and their request-wide attachment count. Pending snapshot IDs follow the active attachment target.
Snapshot target resolution and delivery apps/web/src/components/desktop/SnapShotCoordinator.tsx	The coordinator pins captures to question drafts for animation and delivery. It checks the shared attachment limit and clears pins after successful delivery or failure.
Snapshot routing validation apps/web/src/components/desktop/SnapShotCoordinator.test.ts	Tests cover question-draft delivery, fallback to the thread draft, capture-specific target pinning, and rejection when the request attachment limit is reached.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: bil0000

Merge Risk: ⚪ Minimal · up to 1997d

Snapshots route to eligible open questions and fall back to the thread draft when the question closes or starts responding. No merge-blocking issue was established; desktop overlay animation remains unverified.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 1997d

Captures remain scoped to their conversation, with eligibility and attachment-limit checks. However, a capture finishing during answer submission can be omitted from the answer and left in an inactive draft. No expanded access was established within the inspected scope.

Retained concerns

• Medium · reliability · inferred: An in-flight capture can outlive question ownership. Delivery retains its resolved question target across asynchronous reads and compression without reserving question preparation or rechecking eligibility before insertion. If answer submission constructs its payload first, the capture is omitted; if completed-question cleanup also runs first, insertion can recreate the inactive draft and subsequently acknowledge the capture. This weakens terminal cleanup and ownership guarantees for captured image data. The responding gate protects later target resolutions, not delivery already underway.

Security review details

Security Blast Radius

• inferred — The evidenced effect is confined to captured image data and its draft destination within the selected environment and conversation. No new identity, credential, infrastructure privilege or production server endpoint was established by the inspected change.

Trust Boundaries and Controls

• observed — The routed test entrypoint uses a stubbed desktop bridge, not a new externally callable endpoint. Production captures continue through the existing bridge. Scoped registry lookup and pin matching constrain destination selection, while shared-limit rejection leaves the rejected capture unacknowledged.

Resilience and Maintainability Implications

• inferred — Completed-question cleanup releases attachments and clears draft content, but it is driven by question-state changes rather than coordinated with capture completion. A late insertion can therefore recreate captured image state after cleanup. This is an ownership and data-lifecycle concern, not evidence of unauthorized disclosure.

Hardening Proposals

• proposed — Coordinate capture preparation with question submission and validate question ownership immediately before insertion. A question that reaches a terminal state during capture preparation should follow an explicit fallback or cancellation policy rather than allowing its draft to be recreated.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 44.44% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 4 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	The PR satisfies the coding requirement in issue #12271. ChatComposer registers the active question draft when it accepts attachments. SnapShotCoordinator resolves and pins the question target bef…
Out of Scope Changes check	✅ Passed	The changes stay within issue #12271. Question-draft tracking, snapshot target resolution, delivery behavior, attachment-limit handling, and focused tests directly support attaching keyboard-triggered…
Title check	✅ Passed	The title clearly and concisely describes the primary fix: routing SnapShots to the open question instead of the hidden composer.
Description check	✅ Passed	The description includes the problem, implementation details, issue and maintainer approval reference, focused verification results, screenshots, and the unverified desktop overlay check.

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Actionable comments posted: 1

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🤖 Prompt to fix review comments

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Inline comments:
In `@apps/web/src/components/chat/ChatComposer.tsx`:
- Around line 1573-1579: Update questionAcceptsSnapShots to also require
!activePendingIsResponding, so the trackOpenQuestionAttachmentDraft effect
cleans up when the answer begins sending and snapshot delivery falls back to the
thread draft.

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📥 Commits

Reviewing files that changed from the base of the PR and between 4749035 and c519ed8.

📒 Files selected for processing (4)

• apps/web/src/components/chat/ChatComposer.tsx
• apps/web/src/components/desktop/SnapShotCoordinator.test.ts
• apps/web/src/components/desktop/SnapShotCoordinator.tsx
• apps/web/src/questionAttachments.ts

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[juliusmarminge]

Note

This comment is posted by Julius' dot

The screenshots show the question attachment, but the desktop overlay animation is explicitly unverified and no recording shows the changed capture flow. Under the verification requirement, please add a short desktop recording of a shortcut capture landing in the open question and being submitted, then request reconsideration.