fix(browser): picking a saved view no longer reopens its menu

[ajslater]

Problem

After you pick a saved view from the settings drawer's Load Saved View combobox, the view loads (GET …/saved-settings/<pk> → 200). Then the dropdown pops back open, with focus still in the input.

Cause

I confirmed this in a real browser with a timeline of menu state and store actions:

1. Vuetify's closeOnSelect closes the menu, and focus stays in the combobox input.
2. loadSavedSettings → setSettings changes settings. The component's deep browserSettings watcher sets selectedName = null.
3. VCombobox's watch(model) then sets _search = ''. Its watch(_search) sets menu = true because isFocused && !menu, so the menu reopens.

In the timeline, the menu closes at +34 ms and reopens at +95 ms, right when setSettings finishes. Clearing selectedName by hand while the input is focused and the menu is closed reopens it too.

Fix

The watcher now blurs the combobox before it clears a picked view, meaning a model that is an object with a pk. The name still clears, and the menu stays shut.

The blur is limited to picked views because every loadBrowserPage re-sets settings.breadcrumbs, which fires the same watcher. My first try blurred on every call. It closed a menu the user had opened while a page load was still in flight. A test now covers that case.

Verification

• Real browser (bin/dev.sh, fresh worktree DB): I saved a throwaway view and picked it by mouse (twice) and by keyboard (ArrowDown, Enter). After each pick there was no active .v-overlay--active.v-menu and the name was cleared.
• Also checked in the browser:
  • A view whose settings match the current ones.
  • Opening the menu while a page load was in flight: it stays open.
  • Save → Overwrite dialog.
  • Merged with the trash-icon branch (identical to feat(browser): saved views can be deleted #959): a pick from its item slot keeps the menu closed, and the trash icon → Delete View dialog deleted the throwaway view (DELETE → 204).
• Vitest (browser-saved-views-menu.test.js): the menu stays closed when a picked view's settings land, the name clears, and a page load doesn't close a menu opened mid-load. The first test fails without the fix. The third fails if the blur isn't limited to picked views.
• make fix, make lint and make test all pass (vitest 962, pytest 1574 passed with 1 expected xfail).

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