ui: generate a profile from a card snapshot

- new 'Profile from snapshot' button in the Profiles toolbar: reuses the
  snapshot picker (profilerSnapshotPickListHtml refactor) and then opens
  the same scan form as Profile from card (profilerScanOpenForm), with
  the profile name prefilled from the snapshot
- new profiler-build target 'profile-snapshot': the form's ignore list,
  mask options and FCP/FCI mode apply to profilerScanSnapshot(), which
  walks the snapshot's captured files instead of the card; uncaptured
  contents produce rules without a content check, record files map to
  exact record content, transparent files honor the masks
- profilerScanStart() pushes the generated profile and opens the editor
  like the live scan; _scanSnapshot is cleared in the finally block
- RU entry 'Профиль из снимка'; tests for the snapshot rule builder
  (exact/mask/ignore/uncaptured/record), the snapshot scan progress, the
  picker wiring and the form title, plus a structural button check;
  help EN/RU and READMEs updated; SW cache v130 -> v131.

frontend/tests/html.test.js

@@ -81,3 +81,10 @@ test('file manager shows FCI info and keeps the selection in state, not the DOM'
     assert.ok(html.includes('pysimFsSelected = name;'));
     assert.ok(!html.includes('pysimFsSelect()'));
 });
+
+test('profile list has a Profile from snapshot button', () => {
+    assert.match(html, /data-l10n="Profile from snapshot">Profile from snapshot</);
+    assert.ok(html.includes('onclick="profilerFromSnapshot()"'));
+    assert.ok(html.includes('function profilerScanFromSnapshot(si)'));
+    assert.ok(html.includes('function profilerBuildFileRuleFromSnapshot('));
+});