release: v1.3.0 — shared/external MemPalace + nano/micro editors + CI lint

Promotes the Unreleased block to v1.3.0. Bundled contents:
- feat: shared/external MemPalace — mempalace.ts bridge honours MEMPALACE_REMOTE_URL;
  adds docker-compose.mempalace.yml.
- feat: nano + micro non-modal editors (Dockerfile.base → base rebuild).
- ci: lint.yml (sh-vs-bash guard + actionlint/shellcheck), docker-publish.yml bash
  defaults, promote-base-latest shell fix.
pi stays 0.80.3 (== npm latest). Base rebuilds (mempalace-toolkit ref advanced +
Dockerfile.base nano/micro), so the new bridge + editors land in base-<hash>.

CHANGELOG.md

@@ -11,7 +11,18 @@ Pre-v1.0.0 tags followed the pi npm version (`v{pi_version}[letter]`).
 
 ---
 
-## Unreleased
+## v1.3.0 — 2026-07-02
+
+Minor release. Headline: **shared/external MemPalace** — the `mempalace.ts`
+bridge can now point at one MemPalace HTTP server (`MEMPALACE_REMOTE_URL`,
+optional `MEMPALACE_REMOTE_TOKEN`) shared across containers/harnesses instead of
+a per-container local palace; ships `docker-compose.mempalace.yml` for the
+server. Also ships the **`nano` + `micro`** non-modal editors and a **CI
+workflow-lint layer** (Gitea-accurate sh-vs-bash guard + actionlint/shellcheck),
+with the `docker-publish.yml` bash-defaults and `promote-base-latest` shell
+fixes. pi stays `0.80.3`; the base image rebuilds (the mempalace-toolkit ref
+advanced and `Dockerfile.base` gained nano/micro), so the new bridge and editors
+land in `base-<hash>`.
 
 ### Added