feat: add Linux desktop launcher for dev builds

[hobson]

Adds tools/anki-dev.desktop with an ANKI_SRC placeholder and install instructions in README.md for XDG-compatible desktops (GNOME, KDE, etc.).

Linked issue (required)

Fixes #5075

Summary / motivation (required)

Adds tools/anki-dev.desktop with paramaterized ANKI_SRC path for configuration by developer/tester wishing to integrate a pre-release dev version of the Anki app with their Desktop for testing or daily use.

Steps to reproduce (required, use N/A if not applicable)

N/A

How to test (required)

Compile with just run and then follow the newly added instructions in updated README.md section ### Linux Desktop Integration:

# From the repo root
sed "s|ANKI_SRC|$(pwd)|g" tools/anki-dev.desktop \
    > ~/.local/share/applications/anki-dev.desktop
update-desktop-database ~/.local/share/applications/

Open your app grid, find Anki (dev), and launch, pinning it to your toolbar or right click and "Add to Favorites" to verify it launches correctly and is integrated with your particular XDG-compatible Linux Desktop. To verify live (--editable) install, add a new feature and recompile before launching and testing the "Anki (dev)" desktop app.

Checklist (minimum)

• I ran just check
• Could not identify a new test.

Details

Works as expected on Ubuntu 26.04:

• Launches from the ⊞ or "app grid" keyboard key then "Anki"
• Pinnable icon is shown in the Taskbar/Toolbar after launch

After installing Anki (dev) with this Desktop file, and updating the Software Registry in Ubuntu 26.04 (see new README.md section), the Software Manager (gnome-software) does not list Anki (dev) under the "Installed" tab, but rather the released "Anki" app which has not been installed. Clicking on that app redirects to the Install link for the Flatpack/release version.

Before / after behavior (optional)

N/A

Risk / compatibility / migration (optional)

N/A (developer-only feature)

UI evidence (required for visual changes; otherwise N/A)

Scope

• This PR is focused on one change (no unrelated edits).

[read-the-docs-community]

Documentation build overview

📚 Anki | 🛠️ Build #33362238 | 📁 Comparing d007fdd against latest (b00308e)

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1 file changed

± index.html