fix(frontend): persist sidebar on host guide page and toggle fullscreen layout

[dembrane-sam-bot]

Summary

Addresses feedback on the host guide page: when clicking "Host guide" link, the sidebar disappeared because the route was not nested under the main layout router children (BaseLayout).

This PR nests the <HostGuidePage /> route under the workspace-scoped layout children list in Router.tsx so the sidebar persists. It also modifies HostGuidePage.tsx container and toolbar styling to cleanly handle transitions between normal and fullscreen layouts.

What this changes

• The sidebar now remains visible and persistent when navigate to the "Host guide" page — Router.tsx
• Toggling "Fullscreen" on the Host guide page cleanly covers the viewport and hides the sidebar, restoring normal inline layout upon exit — HostGuidePage.tsx

Confidence

Confidence: high. Standard routing nested structure change and clean conditional style toggles on fullscreen state.

Refs: https://dembrane.slack.com/archives/C0884QPQF6W/p1779876000035059

Summary by CodeRabbit

• Bug Fixes
  • Improved fullscreen mode display for HostGuidePage with proper viewport coverage and fixed header positioning.

[github-actions]

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: bcd183e4-d0f8-4696-923c-5b8ea62967ce

📥 Commits

Reviewing files that changed from the base of the PR and between b12baf5 and a3869f6.

📒 Files selected for processing (2)

• echo/frontend/src/Router.tsx
• echo/frontend/src/routes/project/HostGuidePage.tsx

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Walkthrough

Route nesting for HostGuidePage was reorganized under workspace-scoped children, and fullscreen layout styling was added with fixed positioning, viewport alignment, and scroll handling for the page container and toolbar.

Changes

HostGuidePage Fullscreen & Route Scoping

Layer / File(s)	Summary
Route hierarchy adjustment echo/frontend/src/Router.tsx	HostGuidePage route is moved into the same children block as ProjectsHomeRoute (home) under the /w/:workspaceId path, restructuring its nesting relative to sibling workspace routes.
Fullscreen layout styling echo/frontend/src/routes/project/HostGuidePage.tsx	Main page container and header toolbar apply conditional fixed positioning, viewport sizing (top/left/width/height), elevated zIndex, and overflowY: "auto" scrolling when fullscreen mode is enabled.

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🎯 2 (Simple) | ⏱️ ~8 minutes

bug

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main changes: routing adjustment for sidebar persistence and fullscreen layout toggle in HostGuidePage, directly matching the file modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sam/host-guide-sidebar-persistence

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