zwave-js / zwave-js-ui / 22174552956

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fix(ui): enable multiple file selection in Store view (#4550)

File selection in the Store view was limited to single-select,
preventing batch download/delete operations.

## Changes

- Added `select-strategy="leaf"` prop to v-treeview component in
Store.vue

The v-treeview component defaults to `single-leaf` strategy, which only
allows one file to be selected at a time. Specifying `leaf` strategy
enables multi-select for files while maintaining the existing behavior
of non-selectable folders.

```vue
<v-treeview
  v-model:selected="selectedFiles"
  :items="items"
  selectable
  select-strategy="leaf"
  ...
>
```

## Result

![Multiple files selected in Store
view](https://github.com/user-attachments/assets/63feb1bf-9acf-4c17-bbee-ac5c06954aa1)

Users can now select multiple files simultaneously for batch operations.

> [!WARNING]
>
> <details>
> <summary>Firewall rules blocked me from connecting to one or more
addresses (expand for details)</summary>
>
> #### I tried to connect to the following addresses, but was blocked by
firewall rules:
>
> - `224.0.0.251`
>   - Triggering command: `REDACTED, pid is -1` (packet block)
>
> If you need me to access, download, or install something from one of
these locations, you can either:
>
> - Configure [Actions setup
steps](https://gh.io/copilot/actions-setup-steps) to set up my
environment, which run before the firewall is enabled
> - Add the appropriate URLs or hosts to the custom allowlist in this
repository's [Copilot coding agent
settings](https://github.com/zwave-js/zwave-js-ui/settings/copilot/coding_agent)
(admins only)
>
> </details>

<!-- START COPILOT ORIGINAL PROMPT -->



<details>

<summary>Original prompt</summary>

> 
> ----
> 
> *This section details on the original issue you should resolve*
> 
> <issue_title>Selecting a file in the store deselects
others</issue_title>
> <issue_description>### Checklist
> 
> - [ ] I am not using Home Assistant. Or: a developer has told me to
come here.
> - [ ] I... (continued)

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