fix(packaging): restore Snap desktop runtime (#1406)

* fix(packaging): restore Snap desktop runtime

* docs(packaging): publish Snap launch repair note

* fix(packaging): declare Node 22.12 floor

* docs(architecture): update SQLite pin rationale

* fix(tooling): align Node engine floor

* fix(tooling): constrain supported Node releases

* docs(architecture): correct node-abi consumer

docs/architecture/workspace-shell.md

@@ -305,18 +305,25 @@ Window decorations on Linux (shadows, corners):
 
 Toolchain notes for the Electron 41 upgrade:
 
-1. `better-sqlite3` is pinned to exactly `12.9.0` — the last release that
-   ships prebuilt binaries for BOTH Node 20 (ABI 115, used by Jest) and
-   Electron 41 (ABI 145, used at runtime). `12.10.0` dropped the Node 20
-   prebuilds, which forces a from-source build that fails on machines
-   without a C++ toolchain.
+1. `better-sqlite3` remains pinned to exactly `12.9.0` so native dependency
+   updates happen deliberately with database-worker, packaging, and Electron
+   E2E validation. The former Node 20 prebuild constraint no longer applies
+   now that the supported development floor is Node 22.13; revisit this pin
+   in a dedicated native-dependency update.
 2. The pnpm override `node-abi@3.85.0 -> 3.92.0` is required so
-   `@electron/rebuild` (via `electron-builder install-app-deps`) can map
-   Electron 41 to its ABI.
-3. Local development needs **Node >= 22.12**, declared in `engines`.
-   `electron-builder` 26.15.3 pulls `@electron/rebuild` 4, which sets that
-   floor, and the root `postinstall` runs `install-app-deps` on every
-   `pnpm install`. CI already runs Node 22.
+   `better-sqlite3`'s `prebuild-install` can map Electron 41 to ABI 145 when
+   `electron-builder install-app-deps` rebuilds native modules. The 3.85
+   registry stops at Electron 40, while 3.92 includes Electron 41;
+   `@electron/rebuild` itself now resolves `node-abi` 4.x.
+3. Local development supports **Node 22.13–22.x or Node >= 24**, declared in
+   `engines` as `^22.13.0 || >=24.0.0`.
+   The direct `@faker-js/faker` dependency and current lint tooling require
+   that floor. `electron-builder` 26.15.7 also pulls `@electron/rebuild` 4,
+   which requires Node 22.12 or newer, and the root `postinstall` runs
+   `install-app-deps` on every `pnpm install`. The 26.15.7 minimum also
+   carries the v26 backport that fully extracts the Snap template's `.tar.7z`
+   payload; 26.15.0–26.15.6 can
+   produce a Snap that is missing `desktop-init.sh`. CI already runs Node 22.
 
 Known caveats: