Update documentation links and extend error messages

[lmagyar]

Proposed Changes

Better link to TS docs, better error messages for users who don't read docs.

Related Issues

Summary by CodeRabbit

• Documentation
  • Updated account setup and admin-console URL references across the guide.
  • Refreshed the “share_homeassistant” Funnel step to reference the correct requirement and updated its related link.
• Bug Fixes
  • Improved Home Assistant sharing failure messages with clearer, multi-line guidance when HTTPS or Funnel support is disabled.
  • Enhanced the exit-node vs. advertise-exit-node conflict message to provide clearer instructions.

[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 Plus

Run ID: f03e47bc-90c8-4a86-b2a1-fa6e988a5359

📥 Commits

Reviewing files that changed from the base of the PR and between 2ea735c and ea0d1db.

📒 Files selected for processing (1)

• tailscale/DOCS.md

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

• tailscale/DOCS.md

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Walkthrough

Updated Tailscale console URLs, Funnel documentation references, and runtime error messages for Home Assistant sharing and conflicting exit-node configuration.

Changes

Tailscale guidance and runtime errors

Layer / File(s)	Summary
Console and Funnel documentation tailscale/DOCS.md	Account, admin-console, machines, and Funnel references now use updated Tailscale URLs and terminology.
Share Home Assistant runtime messages tailscale/rootfs/etc/s6-overlay/s6-rc.d/share-homeassistant/run	Disabled HTTPS and Funnel errors now use multi-line messages with share_homeassistant documentation guidance.
Exit-node error message tailscale/rootfs/etc/s6-overlay/s6-rc.d/post-tailscaled/run	The conflicting exit-node configuration error now includes additional configuration guidance.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• hassio-addons/app-tailscale#627: Updates related Tailscale documentation links in tailscale/DOCS.md.

Poem

A rabbit reviews each console trail 🐇
While clearer error messages prevail
Funnel links hop to a newer place
Exit-node notes explain the case
The docs and scripts now share one pace

🚥 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 summarizes the main changes: documentation link updates and clearer error messages.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@tailscale/DOCS.md`:
- Line 18: Update the prerequisite link in DOCS.md from the Tailscale admin
console URL to https://tailscale.com/start so it points to the signup flow
described in the documentation.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 96c99edd-9d88-49ab-914d-0369aa4bf993

📥 Commits

Reviewing files that changed from the base of the PR and between 221c8c7 and 2ea735c.

📒 Files selected for processing (1)

• tailscale/DOCS.md