feat(expert-consultation): add banner and modal with HubSpot form integration

[samuv]

This is a stacked PR that need to be merged after this

Adds an expert consultation banner shown on group routes when a group has more than 3 servers. Clicking the CTA opens a modal with a HubSpot form. Submitting suppresses permanently, dismissing suppresses for 30 days. Does not overlap with the newsletter modal.

• Add expert-consultation electron-store and SQLite dual-write for expertConsultationSubmitted and expertConsultationDismissedAt, reconciled on startup
• Expose getExpertConsultationState, setExpertConsultationSubmitted, setExpertConsultationDismissedAt via IPC and preload API
• Add ExpertConsultationBanner component with banner visibility logic (route, server count, newsletter overlap, dismiss/submit state)
• Add ExpertConsultationDialog with Zod validation, HubSpot v3 API submission (form 5f1a7a2c-5069-44b7-9444-d952c55ce89c), consent handling, success/error states, Sentry capture, and analytics
• Mount banner in root layout, scoped to /group/$groupName routes
• Add unit and component tests for state persistence, reconciliation, and banner/modal behavior

Kapture.2026-03-19.at.15.34.09.mp4

[samuv]

/build-test

[github-actions]

Build Artifacts for PR #1769

Platform	Architecture	Status
macOS	arm64	✅ Ready
macOS	x64	✅ Ready
Windows	arm64	✅ Ready
Windows	x64	✅ Ready
Linux	arm64	✅ Ready
Linux	x64	✅ Ready

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Version: pr-1769 | Artifacts expire in 7 days | Triggered by @samuv

Note: macOS builds are signed (not notarized). Windows and Linux builds are unsigned.