feat(desktop): new user landing screen without sidebar or topbar

[saddlepaddle]

Summary

• New users with no projects now see a clean landing screen without sidebar or topbar
• Created a separate _onboarding pathless layout route parallel to _dashboard
• All navigations in the onboarding flow (welcome → project → workspace) use history.replace so setup screens never appear in back-button history

Changes

• New: _onboarding/layout.tsx — minimal layout with only a drag region for window controls
• New: _onboarding/welcome/page.tsx — renders StartView inside the clean layout
• Modified: workspace/page.tsx — redirects to /welcome when no workspaces (instead of rendering StartView inside dashboard layout)
• Modified: StartView/index.tsx — navigate to project with replace: true
• Modified: useCreateWorkspace.ts — navigate to workspace with replace: true

Test plan

• Open desktop app with no projects — should see clean landing screen (no topbar/sidebar)
• Open or clone a project — should transition to dashboard layout with topbar/sidebar
• Create a workspace from "What are you building?" — should land on workspace
• Press back at any point during onboarding — should not revisit setup screens
• Open app with existing projects — should go directly to last workspace as before

Summary by CodeRabbit

• New Features

  • Added onboarding flow with a welcome page.
  • Improved Start view with enhanced drag‑and‑drop, refreshed layout, and updated primary actions.
  • Rebuilt repository clone dialog with a standardized modal, improved input handling and loading states.

• Bug Fixes

  • Empty workspace state now redirects to the welcome page.
  • Navigation now replaces history entries when creating workspaces and opening projects.

• Chores

  • Updated analytics-related dependency.

[coderabbitai]

📝 Walkthrough

Walkthrough

Adds onboarding layout and welcome route; changes several navigation calls to use history replacement (replace: true); redirects an empty authenticated dashboard to the onboarding welcome page; UI and dialog refinements in StartView and CloneRepo flow; bump of posthog-node version.

Changes

Cohort / File(s)	Summary
Workspace creation hook apps/desktop/src/renderer/react-query/workspaces/useCreateWorkspace.ts	onSuccess navigation now calls navigateToWorkspace(..., { replace: true }), replacing current history entry.
StartView and clone UI apps/desktop/src/renderer/screens/main/components/StartView/index.tsx, apps/desktop/src/renderer/screens/main/components/StartView/CloneRepoDialog.tsx	UI/layout updates (logo, spacing, buttons), drag/drop tweaks, Clone dialog migrated to standardized Dialog components, Enter/loading handling preserved, navigation calls updated with replace: true.
Dashboard empty-state redirect apps/desktop/src/renderer/routes/_authenticated/_dashboard/workspace/page.tsx	When no workspaces exist after load, route redirects to /welcome; StartView import removed and loading spinner used as fallback.
New onboarding routes & layout apps/desktop/src/renderer/routes/_authenticated/_onboarding/layout.tsx, apps/desktop/src/renderer/routes/_authenticated/_onboarding/welcome/page.tsx	Adds OnboardingLayout (queries electronTrpc.window.getPlatform) and welcome page route rendering StartView; layout adjusts draggable header padding based on platform.
Dependency apps/desktop/package.json	Bumps posthog-node from ^5.18.0 to ^5.24.7.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• desktop (fix): init git if project has no git #265 — Modifies the workspace-creation flow and hooks related to useCreateWorkspace.
• feat(desktop): redesign StartView onboarding UI #1081 — Changes StartView and clone flow components overlapping CloneRepoDialog and StartView UI updates.
• feat(desktop): improve StartView onboarding CTA design #930 — Adjusts StartView drag-and-drop and open project flows that intersect with these navigation/layout changes.

Poem

🐰 I hopped through files with nimble paws,

Switched the paths and smoothed the cause,
A tiny welcome, padded and bright,
History trimmed to keep steps light,
Clap your paws — onboarding feels just right!

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main feature: a new landing screen for users without projects that excludes sidebar and topbar elements.
Description check	✅ Passed	The PR description comprehensively covers all required sections: summary, detailed changes, and test plan with specific steps, meeting template expectations.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch new-user-landing-screen-with-no-sidebar-or-topbar

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[github-actions]

🧹 Preview Cleanup Complete

The following preview resources have been cleaned up:

• ✅ Neon database branch
• ✅ Electric Fly.io app

Thank you for your contribution! 🎉