fix(snap): drop uinput plug denied by the Snap Store (#960)

* fix(snap): drop uinput plug denied by the Snap Store

The Snap Store rejected revisions 8-10 over the super-privileged uinput
plug (allow-installation), and reviewers denied the grant request on
forum.snapcraft.io/t/53528, pointing at the RemoteDesktop portal path
the app already prefers. Remove the plug and the uinput-only ydotool so
revisions pass automatic review again; Wayland typing continues through
the RemoteDesktop portal (already the default backend ahead of ydotool),
wtype, IBus Wayland on KDE, and clipboard paste.

KDE Plasma loses its correct-case ydotool path on the store snap (KWin's
portal mangles keysyms on some layouts, KDE bug 489021); the v0.18.x
GitHub .snap still declares uinput for KDE users who sideload it.

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* fix(text-injection): stop telling snap users to connect uinput

The Store snap no longer declares the plug, so the warning pointed at a
command that cannot work. The Snap hints now explain that only the
v0.18.x GitHub sideload declares uinput, and that native Wayland typing
uses the RemoteDesktop portal or IBus Wayland on KDE.

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

---------

Co-authored-by: Jatin K Malik <jk.malik@yahoo.com>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

docs/RELEASE_PROCESS.md

@@ -397,8 +397,8 @@ After pushing the tag, the GitHub Actions workflow will automatically:
    docs/FLATPAK_REMOTE.md)
 8. Deploy the website to vocalinux.com
 9. Build the amd64 snap, attach it to the GitHub Release, and try Snap Store
-   `edge`/`candidate`. Store human review (for example `uinput` allow-installation)
-   must not block the GitHub `.snap`. `stable` does not auto-release (#783):
+   `edge`/`candidate`. Store human review (for example a super-privileged
+   `allow-installation` plug) must not block the GitHub `.snap`. `stable` does not auto-release (#783):
    after candidate QA, dispatch `snap-promote.yml`, which releases the
    candidate revision to `latest/stable`
 10. Mark as pre-release if version contains alpha/beta/rc
@@ -412,7 +412,7 @@ Monitor at: https://github.com/VocaHQ/vocalinux/actions
       both AppImages, both Flatpaks, the amd64 snap, the `.deb` and `.rpm` for
       both arches) - the release notes tell users to run `sha256sum -c`
       against it
-- [ ] If the Store held the snap for `uinput` review, confirm the GitHub `.snap`
+- [ ] If the Store holds the snap for human review, confirm the GitHub `.snap`
       is still attached and the notes document `snap install --dangerous`
 - [ ] After candidate QA (install, tray, mic, model download, typing into a real
       app), promote the snap to stable: