v26.10.1 (#1599)

* feat: AI translations at release, 7 new languages and regional fallback

* fix: proper plural forms for count strings and full translations

* fix: plural forms for selected, hidden and active counts

* fix: synced plugin updates failing on desktop and server-only plugins shown as stopped

* fix: restore rounded corners on app icons and favicon

* feat: desktop app auto updates with automatic, ask first or never modes

* feat: community and custom plugin registries

* feat: plugin guide for AI tools in the SDK with a lint check

* fix: keep the terminal WebSocket open past nginx's 60s default (#1588)

* chore: update changelog

* feat: show plugin download counts only and stop CI builds inflating them

* feat: hide installed plugins in the browse tab by default

* chore: pin bundled plugins to latest releases

* chore: update translations

* fix: focusing a saved password field and saving no longer erases it

* fix: tell desktop users when their 2.8 data needs 2.9 first

* fix: point windows update info at the x64 installer

* fix: keep desktop client tunnel sockets alive behind proxies

* chore: pin bundled plugins to latest releases

* fix: cover client tunnel keepalive in the c2s runtime tests

* fix: typing after opening a host no longer goes to the host search

* fix: accept tab and = separators in SSH config import (#1598)

* chore: update changelog

* chore: drop plugin versions from core changelog

* chore: update translations

* chore: lint, format, and bump version to 26.10.1

---------

Co-authored-by: Darnel Hunter <68697450+innotelinc@users.noreply.github.com>
Co-authored-by: Iain <Iain1970@protonmail.com>

env.catalog.json

@@ -361,10 +361,15 @@
       "group": "plugins",
       "description": "Use another plugin index instead of the official registry."
     },
+    {
+      "name": "TERMIX_COMMUNITY_REGISTRY_URL",
+      "group": "plugins",
+      "description": "Use another plugin index instead of the community registry. Its plugins still have to be signed with the community key."
+    },
     {
       "name": "TERMIX_PLUGIN_STATS_URL",
       "group": "plugins",
-      "description": "Where install counts are read from. Defaults to stats.json next to the registry index."
+      "description": "Where plugin download counts are read from. Defaults to stats.json next to the registry index."
     },
     {
       "name": "TERMIX_REQUIRE_SIGNED_PLUGINS",
@@ -442,6 +447,18 @@
       "internal": true,
       "description": "Read on Linux to pick the password store and window behavior."
     },
+    {
+      "name": "APPIMAGE",
+      "group": "desktop",
+      "internal": true,
+      "description": "Set by AppImage. Tells the desktop app it can update itself."
+    },
+    {
+      "name": "FLATPAK_ID",
+      "group": "desktop",
+      "internal": true,
+      "description": "Set by Flatpak. The desktop app links new versions instead of installing them."
+    },
 
     {
       "name": "DESKTOP_SESSION",