fix(snap): type into native Wayland apps with ydotool (#823)

* fix(snap): inject into native Wayland apps via ydotool

Edge rev 7 only ships wtype and xdotool. GNOME rejects the virtual
keyboard protocol, so the snap falls back to xdotool and types only
into XWayland windows. Native GTK/Qt apps get nothing.

Stage ydotool, request the uinput plug, and prefer ydotool when wtype
is rejected. Distro ydotool 0.1.x still needs a writable /dev/uinput;
log `snap connect vocalinux:uinput` when the Snap cannot open it.

* docs(snap): v0.16.2 edge has no uinput plug

The store snap (0.16.2, latest/edge rev 7) does not declare uinput.
`sudo snap connect vocalinux:uinput` fails with "has no plug named
uinput" and dictation only reaches XWayland apps. Spell that out in
README, INSTALL, UPDATE, the website changelog, and the store copy so
people do not run the 0.17 connect command against rev 7.

* docs(snap): drop the unconfirmed 0.17 version from uinput notes

Greptile P2: the tree is still 0.16.2 and the release process does not
name the next tag. Tell people to refresh until `snap info` lists the
uinput plug, instead of waiting on a version we have not cut.

web/src/app/changelog/page.tsx

@@ -29,6 +29,7 @@ const releases = [
       "CI: gate AUR PKGBUILD builds on every PR; test the distros the docs promise and fix docs drift (PR #772, #773)",
       "Site: VocaGateway family card is Beta; README logo, badges, and privacy copy (PR #765, #764)",
       "Deps: bump the github-actions group (PR #766)",
+      "Snap 0.16.2 edge (rev 7) has no uinput plug: snap connect vocalinux:uinput fails, and dictation only reaches XWayland apps. A later store snap ships ydotool; refresh, then connect uinput (PR #823)",
     ],
   },
   {