feat: add URL IO utility widget

[jo-mueller]

@will-moore just a small feature directly following in the wake of #123: This PR adds a small IO utility to open ome-zarrs from remote URLs directly from the napari UI:

Paste the URL, hit Import and the rest is doing the same as the reader code. The widget ids available under File > IO utilities > Import OME-ZARR from URL

[Copilot]

Pull request overview

Adds a napari “IO utility” widget that lets users paste a remote OME-Zarr URL in the UI and import it via the existing reader pipeline, and wires the widget into the napari manifest/plugin entry-point configuration.

Changes:

• Define a napari.manifest entry point in pyproject.toml and extend the manifest to register a new command/widget + File menu item.
• Add a new import_from_url magicgui-based widget that calls the existing reader and adds returned layers to the current viewer.
• Update isort configuration to recognize magicgui as a third-party import.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
pyproject.toml	Switches to explicit napari.manifest entry point for plugin discovery.
napari_ome_zarr/napari.yaml	Registers the new URL importer command, menu entry, and widget in the napari manifest.
napari_ome_zarr/_widgets.py	Implements the URL import widget and layer-adding behavior.
.isort.cfg	Adds magicgui to known third-party modules for import sorting.

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[will-moore]

This works fine and is a nice addition to the plugin.
Code looks good.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.80%. Comparing base (40bc4a4) to head (7a27cd9).

Files with missing lines	Patch %	Lines
napari_ome_zarr/_widgets.py	0.00%	20 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #151      +/-   ##
==========================================
- Coverage   86.82%   83.80%   -3.02%     
==========================================
  Files           5        5              
  Lines         516      531      +15     
==========================================
- Hits          448      445       -3     
- Misses         68       86      +18     

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[psobolewskiPhD]

FYI this already should work with just File > New from clipboard if the link is on your clipboard!
We have an issue to add Open URI to the File menu....

[jo-mueller]

@psobolewskiPhD cool feature! Do you know by any chance since when this is in napari? Currently napari-ome-zarr pins napari>=0.4.0 but that feature is probably a bit younger ^^

[psobolewskiPhD]

Looks like 0.5.0 (which also made async work, which is pretty crucial to this plugin IMO):
napari/napari#6532

Anyhow, I don't intend to dissuade this widget, just pointing an existing feature. Ideally we'd have a proper dialog in napari so every plugin could use it instead of rolling their own!

[jo-mueller]

Yeah...0.5 is probably a reasonable pin by now :) Also now worries about dissuading, I'm always happy to discover new functionality. In that case I'd just replace this PR by a note in the docs on how to open URLs from the UI.

[psobolewskiPhD]

A tip about New Image from Clipboard is on the welcome screen of napari (the canvas when no layers are present), but I guess folks can quickly gloss over that.

In that case I'd just replace this PR by a note in the docs on how to open URLs from the UI.

Or a PR to napari to implement the dialog 😉