Audit and redirect legacy .htm Sea Saba URLs

[spizeck]

Problem

Production Sentry traffic shows visitors are still reaching legacy Sea Saba URLs such as:

/MainPages/DivePackages.htm

This route is not represented in the current redirect map and should not remain a dead/legacy path if search engines, old bookmarks, external links, or historical references still send traffic there.

Goal

Audit known historical Sea Saba .htm / legacy routes and add precise redirects to their current canonical equivalents.

Scope

• Inspect the repository's existing redirects and current route structure.
• Search the repo, analytics/Sentry breadcrumbs where available, sitemap history/docs, and any known legacy references for old .htm URLs.
• At minimum determine the correct destination for /MainPages/DivePackages.htm.
• Prefer exact one-to-one redirects over broad wildcard rules.
• Preserve query strings where the framework does so automatically.
• Avoid redirect chains.
• Use permanent redirects only when the mapping is clearly canonical.
• Do not invent mappings for legacy routes whose current equivalent is unclear; document them for owner review instead.

Validation

• Add/update redirect tests for each implemented mapping.
• Confirm no loops or chains.
• Confirm current canonical routes still resolve normally.
• Run the normal repo validation and relevant routing/e2e tests.

Final report

Report:

1. base SHA
2. branch/head SHA
3. PR link
4. legacy routes discovered
5. redirects added and rationale
6. unresolved mappings needing owner input
7. tests/validation

Leave the PR open and unmerged.