fix(docs): enable trailingSlash to prevent 404 flash on direct navigation

[fallenbagel]

Description

Since #2981 added per-endpoint webpack chunks for OpenAPI docs, the chunk count tripled (~100 to ~300). This made the docs site's JS bundle large enough that a previously imperceptible flash of PAGE NOT FOUND became visible when navigating directly to any URL with a trailing slash (e.g. /getting-started/).

(previously with 100 chunks):

Screen_Recording_20260406_040014_Firefox.Beta.mp4

With trailingSlash: false, Docusaurus outputs pages as getting-started.html rather than getting-started/index.html. When GitHub Pages receives a request for /getting-started/, it cannot find the file and serves 404.html, which then loads the full React app to client-side redirect to the correct page. With ~100 chunks this was fast enough to go unnoticed. With ~300 chunks the JS takes long enough to parse and execute that the 404 page is briefly visible before the redirect happens.

This PR changes the setting trailingSlash: true making Docusaurus output getting-started/index.html instead, so GitHub Pages serves the file directly without the 404 detour and no JS is required for the initial render, thus, no flash.

This was identified as a side effect of the JS minimizer fix in d88242f (context: #3035 (comment)).

How Has This Been Tested?

Locally built and tested.

Screenshots / Logs (if applicable)

Checklist:

• I have read and followed the contribution guidelines.
• Disclosed any use of AI (see our policy)
• I have updated the documentation accordingly.
• All new and existing tests passed.
• Successful build pnpm build
• Translation keys pnpm i18n:extract
• Database migration (if required)

Summary by CodeRabbit

• Documentation

  • Fixed Plex integration documentation link path for the Watchlist Auto Request feature.

• Chores

  • Updated documentation URL configuration to use trailing slashes consistently.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e03e0abc-5eb2-4a72-9d43-5824ce944a8f

📥 Commits

Reviewing files that changed from the base of the PR and between d88242f and a423713.

📒 Files selected for processing (2)

• docs/using-seerr/plex/index.md
• gen-docs/docusaurus.config.ts

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📝 Walkthrough

Walkthrough

Docusaurus trailing slash handling is enabled in configuration, and Plex documentation link paths are adjusted to reflect the new URL structure. Two minimal, coordinated changes affecting documentation URL generation and relative navigation.

Changes

Documentation URL Configuration Alignment

Layer / File(s)	Summary
Docusaurus trailing slash configuration and documentation path adjustment gen-docs/docusaurus.config.ts, docs/using-seerr/plex/index.md	Trailing slash handling enabled in Docusaurus config. Plex "Watchlist Auto Request" feature link path adjusted from ./plex/watchlist-auto-request to ./watchlist-auto-request to match the new URL structure.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A slash at the end, a path made anew,
Config and docs, aligned just true.
Two tiny changes, both small and pure,
Documentation links, now structured secure.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main change: enabling trailingSlash in Docusaurus config to fix 404 flash issues on direct navigation, which is the primary objective of this PR.
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.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

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