Autocomplete: show price, add a see-all link, debounce requests

[loevgaard]

What

Three improvements to the autocomplete dropdown:

1. Show the price. The product index documents are already channel/currency-scoped, so the correct price exists per index. Each suggestion now shows the price, currency-formatted via Intl.NumberFormat, guarded so non-product sources render nothing.
2. "See all results" footer. Each source now renders a footer link to the full search page for the current query — previously the only path from the dropdown to the results page was knowing to press Enter. The label is translated into all 12 locales and passed through the autocomplete configuration.
3. Debounce the source (~200 ms). Previously every keystroke fired a Meilisearch query straight from the browser; fast typers generated one request per character. A debouncePromise around the sources coalesces them. Stale-response ordering is already handled by the library, so this is purely a load win.

Testing

• e2e shows the price and a see-all link in the suggestions: asserts a formatted price and a footer link to search?q=jeans.
• e2e debounces Meilisearch requests while typing: typing 10 characters quickly issues ≤ 3 multi-search requests.
• AutocompleteRuntimeTest updated for the new seeAllLabel; node --check and lint:container clean.

Closes #136

---

Stacked on #171 (#137).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.19%. Comparing base (97ebda2) to head (837075e).

Additional details and impacted files

@@                      Coverage Diff                      @@
##             issue-137-markup-polish     #172      +/-   ##
=============================================================
+ Coverage                      49.17%   49.19%   +0.01%     
  Complexity                       797      797              
=============================================================
  Files                            140      140              
  Lines                           2546     2547       +1     
=============================================================
+ Hits                            1252     1253       +1     
  Misses                          1294     1294              

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