wiki(Install-Upgrade): BTS-connection security check (#1282)
Install / Upgrade: #1283 hardening + corrected legacy note sites
Install / Upgrade: attachments-repository (FS) security check (#1283)
wiki: Install/Upgrade — record the #1285 forum-link hardening (http(s) allow-list, .attr href)
wiki: Install/Upgrade screen — community forum link restored (#1285)
docs(#1286): Community Videos section on the Install/Upgrade screen - wiki page section 7 + RO screenshot
Ports the four user-contributed YouTube walkthroughs that legacy
install/index.php:52-58 carried and modernization dropped. Adds section 7 to
Install-Upgrade-Modernized.md: the 4 videos (NOvTWZvc2x8, P2zWScVjuag,
7xH1LKQU1TA, 6s48WGuX2WE), the BFF -> HTML data flow, the deliberate deviations
from legacy (target=_blank rel=noopener instead of target="#", i18n captions,
Dashio grid, hostile-payload guard) and the 9/9 PASS regression suite.
Screenshot: issue-1286-install-community-videos-ro.png (Romanian, proves the
captions are localized, not hardcoded).
Refs #1286
Add Install/Upgrade check screen modernized page + screenshot (Refs #797)