feat(newsletter): add signup modal with HubSpot integration

[samuv]

Still WIP, we are fine tuning some things

Adds a one-time newsletter signup modal shown on startup. Subscribing persists the state permanently, dismissing suppresses it for 15 days.

• Add newsletter electron-store and SQLite dual-write for newsletterSubscribed and newsletterDismissedAt, reconciled on startup
• Expose getNewsletterState, setNewsletterSubscribed, setNewsletterDismissedAt via IPC and preload API
• Allow https://api.hsforms.com in CSP for HubSpot form submissions
• Add NewsletterModal component with Zod email validation, HubSpot v3 API submission, success message display, Sentry error capture, and analytics tracking
• Mount modal in root layout, hidden on /shutdown and /cli-issue routes

Kapture.2026-03-18.at.18.35.24.mp4

[Copilot]

Pull request overview

Adds a startup newsletter signup modal integrated with HubSpot, with persisted “subscribed” / “dismissed” state stored via electron-store and dual-written to SQLite, exposed to the renderer via IPC/preload APIs.

Changes:

• Implement newsletter state persistence in the main process (electron-store + SQLite dual-write + reconcile-on-startup).
• Expose newsletter state getters/setters over IPC and add renderer modal UI + HubSpot submission flow.
• Update CSP to allow connecting to HubSpot submissions endpoint, and add renderer/main tests for the new functionality.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
renderer/src/routes/__root.tsx	Mounts NewsletterModal in the root layout (hidden on shutdown/CLI issue routes).
renderer/src/common/mocks/electronAPI.ts	Extends Electron API test stub with newsletter state methods.
renderer/src/common/components/newsletter-modal.tsx	New modal UI + HubSpot submission + persistence calls via window.electronAPI.
renderer/src/common/components/tests/newsletter-modal.test.tsx	New component tests covering visibility, validation, submit, and dismiss behavior.
preload/src/api/app.ts	Adds preload IPC API surface for newsletter state get/set methods.
main/src/tests/newsletter.test.ts	New unit tests for main-process newsletter store behavior and dual-write.
main/src/newsletter.ts	New main-process newsletter store module + SQLite read flag support + dual-write setters.
main/src/ipc-handlers/app.ts	Registers IPC handlers for newsletter state operations.
main/src/db/reconcile-from-store.ts	Adds newsletter keys to reconcile flow from electron-store to SQLite.
main/src/db/tests/reconcile-from-store.test.ts	Extends reconcile tests to assert newsletter keys are synced.
main/src/csp.ts	Allows https://api.hsforms.com in connect-src for HubSpot submissions.

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