fix(#298): Fix async response handling in dashboard

Replaced setTimeout hacks with proper polling mechanism:
- Added pollForQueryResponse() function with configurable polling interval
- Polls every 500ms with 30s timeout
- Properly handles DELIVERED and FAILED message states
- Throws errors for failures and timeouts

Updated dashboard to use polling instead of arbitrary delays:
- Removed setTimeout(resolve, 1000) hacks
- Added proper async/await for query responses
- Improved response data parsing for new query format
- Better error handling via polling exceptions

This fixes race conditions and unreliable data loading.

Fixes #298

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-federation.module.ts_20260203-2247_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/federation.module.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:47:41
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-federation.module.ts_20260203-2247_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-federation.module.ts_20260203-2247_2_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/federation.module.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 2
+**Generated:** 2026-02-03 22:47:54
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-federation.module.ts_20260203-2247_2_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.spec.ts_20260203-2246_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/query.service.spec.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:46:22
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.spec.ts_20260203-2246_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.spec.ts_20260203-2247_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/query.service.spec.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:47:14
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.spec.ts_20260203-2247_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.spec.ts_20260203-2247_2_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/query.service.spec.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 2
+**Generated:** 2026-02-03 22:47:24
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.spec.ts_20260203-2247_2_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.ts_20260203-2246_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/query.service.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:46:38
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.ts_20260203-2246_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.ts_20260203-2246_2_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/query.service.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 2
+**Generated:** 2026-02-03 22:46:45
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.ts_20260203-2246_2_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.ts_20260203-2247_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/query.service.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:47:00
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.ts_20260203-2247_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.ts_20260203-2248_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/federation/query.service.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:48:17
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-federation-query.service.ts_20260203-2248_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-lib-db-context.ts_20260203-2242_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/lib/db-context.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:42:16
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-lib-db-context.ts_20260203-2242_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-lib-db-context.ts_20260203-2242_2_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/lib/db-context.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 2
+**Generated:** 2026-02-03 22:42:24
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-lib-db-context.ts_20260203-2242_2_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-lib-db-context.ts_20260203-2242_3_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/lib/db-context.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 3
+**Generated:** 2026-02-03 22:42:38
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-lib-db-context.ts_20260203-2242_3_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-lib-db-context.ts_20260203-2242_4_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/lib/db-context.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 4
+**Generated:** 2026-02-03 22:42:44
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-lib-db-context.ts_20260203-2242_4_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-prisma-prisma.service.spec.ts_20260203-2241_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/prisma/prisma.service.spec.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:41:42
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-prisma-prisma.service.spec.ts_20260203-2241_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-prisma-prisma.service.ts_20260203-2242_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/api/src/prisma/prisma.service.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:42:02
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-api-src-prisma-prisma.service.ts_20260203-2242_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-app-(authenticated)-federation-dashboard-page.tsx_20260203-2250_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/app/(authenticated)/federation/dashboard/page.tsx
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:50:08
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-app-(authenticated)-federation-dashboard-page.tsx_20260203-2250_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-app-(authenticated)-federation-dashboard-page.tsx_20260203-2250_2_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/app/(authenticated)/federation/dashboard/page.tsx
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 2
+**Generated:** 2026-02-03 22:50:22
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-app-(authenticated)-federation-dashboard-page.tsx_20260203-2250_2_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-lib-api-federation-queries.ts_20260203-2250_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/lib/api/federation-queries.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:50:04
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-lib-api-federation-queries.ts_20260203-2250_1_remediation_needed.md"
+```

docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-lib-api-federation-queries.ts_20260203-2251_1_remediation_needed.md

@@ -0,0 +1,20 @@
+# QA Remediation Report
+
+**File:** /home/jwoltje/src/mosaic-stack/apps/web/src/lib/api/federation-queries.ts
+**Tool Used:** Edit
+**Epic:** general
+**Iteration:** 1
+**Generated:** 2026-02-03 22:51:17
+
+## Status
+
+Pending QA validation
+
+## Next Steps
+
+This report was created by the QA automation hook.
+To process this report, run:
+
+```bash
+claude -p "Use Task tool to launch universal-qa-agent for report: /home/jwoltje/src/mosaic-stack/docs/reports/qa-automation/pending/home-jwoltje-src-mosaic-stack-apps-web-src-lib-api-federation-queries.ts_20260203-2251_1_remediation_needed.md"
+```

docs/scratchpads/298-async-dashboard.md

@@ -0,0 +1,85 @@
+# Issue #298: Fix async response handling in dashboard
+
+## Objective
+
+Replace setTimeout hacks with proper async response handling for federated queries in the dashboard.
+
+## Current State
+
+- Dashboard uses `setTimeout(resolve, 1000)` to wait for query responses (lines 59, 83)
+- Race conditions possible
+- Unreliable data loading
+- Poor UX with arbitrary delays
+
+## Approach
+
+Implement polling mechanism to check query message status:
+
+1. Send query and get message ID
+2. Poll for message status until DELIVERED or FAILED
+3. Extract response data when available
+4. Handle timeouts gracefully
+
+## Implementation Plan
+
+- [x] Create scratchpad
+- [x] Add polling utility function
+- [x] Update dashboard to use polling instead of setTimeout
+- [x] Add proper loading states (via polling)
+- [x] Add error handling (polling throws on failure)
+- [x] Add timeout handling (30s timeout)
+- [ ] Test with actual federation connection (requires live system)
+
+## Changes Made
+
+### apps/web/src/lib/api/federation-queries.ts
+
+Added `pollForQueryResponse()` function:
+
+- Polls every 500ms for message status
+- Timeout after 30 seconds
+- Returns message when DELIVERED
+- Throws error when FAILED or timeout reached
+- Configurable poll interval and timeout
+
+### apps/web/src/app/(authenticated)/federation/dashboard/page.tsx
+
+Replaced setTimeout hacks with polling:
+
+- Line 57-59: Removed setTimeout, added pollForQueryResponse
+- Line 83: Removed setTimeout, added pollForQueryResponse
+- Updated query strings to match new format ("get tasks", "get events")
+- Improved response data parsing to handle new response format
+- Error handling via try/catch (polling throws on failure)
+
+## Testing Notes
+
+- Polling function handles PENDING → DELIVERED transition
+- Polling function handles PENDING → FAILED transition
+- Timeout prevents infinite waiting
+- Errors are properly propagated to dashboard error handling
+
+## Changes to Make
+
+### apps/web/src/lib/api/federation-queries.ts
+
+Add polling function:
+
+- `pollForQueryResponse(messageId: string): Promise<QueryResponse>`
+- Poll every 500ms, timeout after 30 seconds
+- Check message status until DELIVERED or FAILED
+
+### apps/web/src/app/(authenticated)/federation/dashboard/page.tsx
+
+- Remove setTimeout hacks
+- Use polling function to wait for responses
+- Add proper loading states per connection
+- Add better error messages
+- Add timeout handling
+
+## Notes
+
+- Message status: PENDING → DELIVERED or FAILED
+- Poll interval: 500ms
+- Timeout: 30 seconds
+- Need to handle both successful and failed queries