🧹 Extend SessionDetailSnapshotProjection to include diff/plan/turn fields

[Robdel12]

Context

Discovered in #62: SessionDetailSnapshotProjection is missing several fields that exist on ServerSessionState — currentDiff, currentPlan, turnDiffs, currentTurnId, and turnCount. The fix in #66 works around this by assigning them directly in handleConversationBootstrap, but the projection struct should own these fields for consistency with how all other bootstrap data flows through projections.

Task

Add the missing fields to SessionDetailSnapshotProjection and applySnapshotProjection, then remove the direct assignments added in #66.

Files

• OrbitDockNative/OrbitDock/Services/Server/SessionStateProjection.swift
• OrbitDockNative/OrbitDock/Services/Server/ServerTypeAdapters.swift
• OrbitDockNative/OrbitDock/Services/Server/SessionStore+Events.swift

Acceptance Criteria

• SessionDetailSnapshotProjection includes currentDiff, currentPlan, turnDiffs, currentTurnId, turnCount
• applySnapshotProjection sets these on the observable
• Direct assignments in handleConversationBootstrap removed
• Existing tests updated, new test for diff/plan/turn hydration through the projection path

---

Follow-up from #62: I_kwDORFu4Vs71S6MD

[Robdel12]

Workpad — #67

Plan

1. Add currentDiff, cumulativeDiff, currentPlan, turnDiffs, currentTurnId, turnCount, subagents fields to SessionDetailSnapshotProjection
2. Update SessionDetailSnapshotProjection.from(_ session:) to populate them from Session
3. Update ServerSessionState.toDetailSnapshotProjection() to populate them from server state
4. Update SessionObservable.applySnapshotProjection() to assign them
5. Remove the direct assignments in handleConversationBootstrap (lines 250-256)
6. Update existing tests + add new test for diff/plan/turn hydration through the projection path

Status

🔧 Implementing

[Robdel12]

♻️ Extend SessionDetailSnapshotProjection with diff/plan/turn fields: #120

[Robdel12]

Workpad — #67 (final)

Done

1. Added currentDiff, cumulativeDiff, currentPlan, turnDiffs, currentTurnId, turnCount, subagents to SessionDetailSnapshotProjection
2. Updated SessionDetailSnapshotProjection.from(_ session:) with defaults for fields Session doesn't own
3. Updated ServerSessionState.toDetailSnapshotProjection() to pass all fields
4. Updated SessionObservable.applySnapshotProjection() to assign them
5. Removed 7 direct assignments in handleConversationBootstrap
6. Added snapshotProjectionHydratesDiffPlanTurnAndSubagentFields test — all 15 tests pass

PR

#120

[Robdel12]

CI ✅

All checks passed on PR #120:

• macOS Unit Tests — pass
• iOS Unit Tests — pass
• Rust CI — pass

Ready for review.

[Robdel12]

OrbitDock session od-c3832700-f747-4ea5-9893-477a781d5670 stalled after 606s of inactivity and was terminated.