feat(templates): refresh batch Sealos apps

[yangchuansheng]

Summary

Refresh 10 Sealos application templates and bilingual READMEs:

• NetBird: update to netbirdio/dashboard:v2.38.1 and refresh deployment docs.
• New API: update to calciumion/new-api:v0.13.2 and refresh deployment docs.
• Nexus: update to sonatype/nexus3:3.92.3 and refresh deployment docs.
• NocoDB: update to nocodb/nocodb:2026.05.2 and refresh deployment docs.
• Node-RED: update to nodered/node-red:4.1.10 and refresh deployment docs.
• Notifuse: update to notifuse/notifuse:v32.1 pinned by digest and refresh deployment docs.
• OpenCart: update to ghcr.io/yangchuansheng/opencart:4.1.0.3 pinned by digest and refresh deployment docs.
• OpenObserve: update to public.ecr.aws/zinclabs/openobserve:v0.90.3 and refresh deployment docs.
• Outline: update to outlinewiki/outline:1.8.0-1, make Email Magic Link the default auth path, and document SMTP/login setup.
• Overleaf: update to sharelatex/sharelatex:6.1.2, tune resources, and refresh deployment docs.

Test plan

• DOCKER_TO_SEALOS_ARTIFACTS=<10 template index.yaml files> python -X utf8 .agents/skills/docker-to-sealos/scripts/quality_gate.py
• git diff --check upstream/kb-0.9...HEAD

Notes

• Branch rebased onto upstream/kb-0.9 before commit.
• The Overleaf merge kept the upstream MongoDB service-name fix and the refreshed Overleaf template changes.

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