From fbf85e42a259fd6482d9ce2a83bc321b122ebb84 Mon Sep 17 00:00:00 2001
From: "renovate[bot]" <29139614+renovate[bot]@users.noreply.github.com>
Date: Wed, 7 Oct 2026 03:54:20 +0000
Subject: [PATCH] chore(deps): update ubuntu docker tag to v26

---
 docker/docs.Dockerfile     | 2 +-
 docker/full-dev.Dockerfile | 2 +-
 docker/minimal.Dockerfile  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/docker/docs.Dockerfile b/docker/docs.Dockerfile
index 34e5571..b242997 100644
--- a/docker/docs.Dockerfile
+++ b/docker/docs.Dockerfile
@@ -1,6 +1,6 @@
 # Documentation build environment for zpmod
 # Provides consistent documentation generation with Doxygen, GraphViz, and LaTeX support
-FROM ubuntu:22.04
+FROM ubuntu:26.04@sha256:f144425ff09be612d6d9ad965196e9cdc23dae1f42110a8a11a3e9a8198759f7
 
 # Prevent interactive prompts during package installation
 ENV DEBIAN_FRONTEND=noninteractive
diff --git a/docker/full-dev.Dockerfile b/docker/full-dev.Dockerfile
index f77af67..109364d 100644
--- a/docker/full-dev.Dockerfile
+++ b/docker/full-dev.Dockerfile
@@ -1,6 +1,6 @@
 # Full development zpmod test environment
 # Includes complete zsh source and development headers
-FROM ubuntu:22.04
+FROM ubuntu:26.04@sha256:f144425ff09be612d6d9ad965196e9cdc23dae1f42110a8a11a3e9a8198759f7
 
 # Install build dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
diff --git a/docker/minimal.Dockerfile b/docker/minimal.Dockerfile
index d5618bf..20c5bf5 100644
--- a/docker/minimal.Dockerfile
+++ b/docker/minimal.Dockerfile
@@ -1,6 +1,6 @@
 # Minimal zpmod test environment
 # Simulates CI environment with basic zsh installation (no development headers)
-FROM ubuntu:22.04
+FROM ubuntu:26.04@sha256:f144425ff09be612d6d9ad965196e9cdc23dae1f42110a8a11a3e9a8198759f7
 
 # Install minimal dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \