fix(web): stop 401 redirect reload loop on session expiry

[yuzhiyang1]

Fixes #9861

What

When a session expires, the 401 response interceptor in apps/web/core/services/api.service.ts redirects to /?next_path=<currentPath> unconditionally. The entry page / performs its own current-user request on mount; on an expired session that request 401s as well, and the interceptor replaces / with /?next_path=/ — reloading the entry page in an endless loop. The sign-in screen never renders and users see an error boundary or a constantly reloading page.

How

Skip the redirect when window.location.pathname is already /, so the NON_AUTHENTICATED branch of AuthenticationWrapper can render the sign-in form for requests originating from the entry page itself. Private routes keep the existing next_path behaviour (bounce to /, sign in, return where you were).

Verification

Self-hosted v1.4.2 built from source: with an expired session cookie, loading / after this change renders the sign-in form instead of looping; authenticated flows are unaffected.

Summary by CodeRabbit

• Bug Fixes
  • Prevented unnecessary redirect loops when authentication fails on the root entry page.
  • Unauthorized requests on the home page now remain on that page instead of triggering a self-reloading redirect.
  • Preserved redirects for unauthorized requests on other pages while safely encoding the return path.

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ℹ️ Recent review info

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Reviewing files that changed from the base of the PR and between 6f30c23 and 0f8f8fb.

📒 Files selected for processing (1)

• apps/web/core/services/api.service.ts

🚧 Files skipped from review as they are similar to previous changes (1)

• apps/web/core/services/api.service.ts

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📝 Walkthrough

Walkthrough

The 401 response interceptor no longer redirects when the current path is /. It retains encoded redirect behavior for non-root paths.

Changes

Authentication redirect handling

Layer / File(s)	Summary
Root-path 401 redirect guard apps/web/core/services/api.service.ts	The interceptor skips the redirect when window.location.pathname is /. Non-root paths still redirect to /?next_path=<encoded currentPath>.

Priority: ➖ Normal

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Bug fix · Severity of issue fixed: Medium

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the primary change: preventing the 401 redirect reload loop when a session expires.
Description check	✅ Passed	The description explains the problem, implementation, expected behavior, linked issue, and verification results. It does not use the template headings or explicitly select a change type, but it includ…
Linked Issues check	✅ Passed	The change satisfies issue #9861. The 401 interceptor skips window.location.replace when window.location.pathname === "/", which prevents the /?next_path=/ reload loop and allows the sign-in scr…
Out of Scope Changes check	✅ Passed	The reviewed change is limited to the 401 redirect guard, next_path URL encoding, and related comments in apps/web/core/services/api.service.ts. These changes support issue #9861. No unrelated cha…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
In `@apps/web/core/services/api.service.ts`:
- Line 51: Update the redirect construction in the sign-in flow to apply
encodeURIComponent to currentPath before assigning it to the next_path query
parameter, preserving the full return path as a single parameter while retaining
the existing behavior when no path is available.

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ℹ️ Review info

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Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: f0228d26-faf1-460c-a1fd-ebfb6189eed9

📥 Commits

Reviewing files that changed from the base of the PR and between 01064a7 and 6f30c23.

📒 Files selected for processing (1)

• apps/web/core/services/api.service.ts

Included review availability: Your plan provides up to 10 included reviews per hour; 7 remain after this review.