feat(user): location suggestions from OpenStreetMap

There is no place database on this machine, and the user chose
Nominatim over a tz city list for coverage. It is asked 1s after typing
stops (its policy: one request a second, an identifying User-Agent,
nothing personal sent), from three characters, in the desktop's
language, and a reply to an older query is dropped. places() turns its
JSON into 'place, region, country' labels and treats an error page as
no suggestions; test_user.js covers it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/desktop/modules/user/User.js b/desktop/modules/user/User.js
index 8160b7f..5c3d5a2 100644
--- a/desktop/modules/user/User.js
+++ b/desktop/modules/user/User.js
@@ -44,3 +44,21 @@ function gitName(name) {
     if (w.length < 2) return w.join(" ");
     return w.slice(0, -1).join(" ") + " " + Array.from(w[w.length - 1])[0] + ".";
 }
+
+// Nominatim jsonv2 search results as location labels, "place, region,
+// country", deduplicated. Anything that is not a JSON array (an error page,
+// a rate-limit notice) is no suggestions rather than an error.
+function places(text) {
+    let rows;
+    try { rows = JSON.parse(text); } catch (e) { return []; }
+    if (!Array.isArray(rows)) return [];
+    const out = [];
+    for (const r of rows) {
+        const a = r.address || {};
+        const parts = [a.city || a.town || a.village || a.hamlet || a.municipality || r.name,
+                       a.state, a.country].filter(p => p);
+        const label = parts.filter((p, i) => parts.indexOf(p) === i).join(", ");
+        if (label && !out.includes(label)) out.push(label);
+    }
+    return out;
+}