fix(web): brand the page titles and give shared links a preview

[MikkoNumminen]

The tab said "Feedback situation". That string is the name in a browser tab and in a shared link preview, and it named neither the product nor whose it is. A recruiter with five tabs open has no way to tell which one this was.

Titles now lead with the product

	was	now
index	Feedback situation	Feedback Intelligence — Mikko Numminen
desk	Feedback — desk entry	Desk entry — Feedback Intelligence
saved snapshot	Feedback situation — saved snapshot	Saved snapshot — Feedback Intelligence

Both locales, and both the static <title> and the runtime pageTitle the page assigns on load.

The h1 keeps its functional wording. Inside the app, "Palautetilanne" is what the heading is describing — identifying the tab is a different job from labelling the view.

The larger gap: there was no link preview at all

Neither page carried og:title, og:description, twitter:card, or even a description meta. The whole head was charset, viewport and title.

That matters more than the wording, because a crawler never runs the script that sets document.title — the static markup is all it ever sees. So a pasted link showed a bare URL with no card.

Both pages now carry description, canonical, Open Graph and Twitter card tags. Saved snapshots get the same treatment and needed it most, being the artefact most likely to end up pasted into a chat or an email.

Canonicals point at the owned domain

index  ->  https://mikkonumminen.dev/feedback
desk   ->  https://mikkonumminen.dev/feedback/desk

Not azurestaticapps.net, so the shared identity is the domain rather than the host. /feedback/desk did not exist — it 404'd — and is added in mikkonumminen.dev as PR #453. The two should land together, or the canonical points at a 404.

No og:image, deliberately

There is no image asset in wwwroot to point at, and a broken og:image previews worse than none. twitter:card is summary rather than summary_large_image for the same reason. Adding a real card image would be a genuine follow-up.

Verification

dotnet build clean, 274 tests pass (170 Api + 79 Llm + 25 Generator).

dist/ is gitignored and rebuilt from wwwroot by tools/publish-frontend.ps1, which copies the HTML verbatim — checked, no head rewriting — and the deploy workflow already triggers on these files. Note it also publishes index.html a second time as demo.html, which inherits the fix.