fix(ci): run apt non-interactively so needrestart can't hang a runner

The v0.1.2 Linux release job sat for 15+ minutes on a self-hosted Debian
runner: after apt-get install, needrestart prompted for which daemons to
restart and waited on a terminal CI does not have.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.gitea/scripts/linux-deps.sh

@@ -3,5 +3,13 @@
 # both need the exact same Linux build dependencies. Edit once, here.
 set -euo pipefail
 
-sudo apt-get update -qq
-sudo apt-get install -y -qq cmake ninja-build libobs-dev libcurl4-openssl-dev
+# Non-interactive, or a self-hosted Debian runner hangs forever: after an
+# install, needrestart asks which daemons to restart ("1. postfix.service
+# 2. none of the above") and waits on a terminal CI does not have. That
+# stalled the v0.1.2 Linux release job on 2026-10-05. NEEDRESTART_MODE=a
+# answers it; DEBIAN_FRONTEND covers debconf prompts. Passed through sudo
+# explicitly, since sudo drops the caller's environment by default.
+APT=(sudo DEBIAN_FRONTEND=noninteractive NEEDRESTART_MODE=a apt-get)
+
+"${APT[@]}" update -qq
+"${APT[@]}" install -y -qq cmake ninja-build libobs-dev libcurl4-openssl-dev