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>

scripts/electron-backend-failure.test.ts

@@ -1,5 +1,6 @@
 import { createRequire } from "node:module";
 import { describe, expect, it } from "vitest";
+import { PRE_29_DATABASE_ERROR } from "../src/backend/database/db/upgrade-guard.js";
 
 const require = createRequire(import.meta.url);
 const { classifyBackendFailure } =
@@ -46,6 +47,16 @@ describe("classifyBackendFailure", () => {
     });
   });
 
+  it("identifies a 2.8 database the backend refused to open", () => {
+    const stderr = `[ERROR] [SYSTEM] Failed to initialize backend services [op:startup_failed]
+Error: ${PRE_29_DATABASE_ERROR}
+    at assertNotPre29Database (upgrade-guard.js:14:11)`;
+    expect(classifyBackendFailure(stderr)).toEqual({
+      reason: "old-database",
+      port: null,
+    });
+  });
+
   it("reports a crash for any other non-zero exit", () => {
     expect(classifyBackendFailure("TypeError: boom")).toEqual({
       reason: "crashed",