build: bump freedesktop runtime 24.08 -> 25.08

24.08 ships libpipewire/gst-plugin-pipewire 1.2.4, whose buffer negotiation
fails against KWin 6.7 + PipeWire 1.6.9 hosts (pipewiresrc: error alloc
buffers). 25.08 (libpipewire 1.4.9) was verified working on openSUSE Kalpa
via flatpak run --runtime-version=25.08; the host only needs the PipeWire
daemon, so older hosts (Mint 22, PipeWire 1.0) stay compatible.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

.gitea/workflows/build-flatpak.yml

@@ -30,10 +30,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     container:
-      # ubuntu:24.04 matches the freedesktop 24.08 runtime closely enough
-      # (glibc 2.39, GStreamer 1.24) that the cargo-built binary runs
-      # unmodified inside the runtime. Privileged so Flatpak's bwrap works
-      # where needed (runtime install triggers).
+      # ubuntu:24.04 (glibc 2.39, GStreamer 1.24) is older than the
+      # freedesktop 25.08 runtime (glibc 2.41, GStreamer 1.26), so the
+      # cargo-built binary runs unmodified inside the runtime (same sonames,
+      # forward-compatible symbol versions). 25.08 is required: 24.08 ships
+      # libpipewire 1.2 whose buffer negotiation fails against KWin 6.7 /
+      # PipeWire 1.6 hosts ("pipewiresrc: error alloc buffers"). Privileged
+      # so Flatpak's bwrap works where needed (runtime install triggers).
       image: ubuntu:24.04
       options: --privileged
     steps:
@@ -120,7 +123,7 @@ jobs:
         if: steps.check.outputs.build == 'true'
         run: |
           flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
-          flatpak install -y flathub org.freedesktop.Platform//24.08 org.freedesktop.Sdk//24.08
+          flatpak install -y flathub org.freedesktop.Platform//25.08 org.freedesktop.Sdk//25.08
 
       - name: Stamp version into AppStream metadata
         if: steps.check.outputs.build == 'true'

README.md

@@ -3,7 +3,8 @@
 Flatpak packaging for the [HeiniRemote](https://git.pc-heini.de/pc-heini/HeiniRemote)
 customer agent (`de.pc_heini.HeiniRemoteAgent`) — an additional distribution
 channel next to the plain release binary, with all dependencies (GStreamer,
-libnice, wl-clipboard, …) pinned inside the freedesktop 24.08 runtime.
+libnice, wl-clipboard, …) pinned inside the freedesktop 25.08 runtime (24.08 ships libpipewire 1.2,
+whose buffer negotiation fails against KWin 6.7 / PipeWire 1.6 hosts).
 
 Same setup as [o3de-flatpak](https://git.pc-heini.de/pc-heini/o3de-flatpak):
 a Gitea Action builds the Flatpak **without** `flatpak-builder` (no bubblewrap

scripts/make-flatpak.sh

@@ -16,7 +16,7 @@ set -euo pipefail
 cd "$(dirname "$0")/.."
 
 APP_ID=de.pc_heini.HeiniRemoteAgent
-RUNTIME_VER=24.08
+RUNTIME_VER=25.08
 BRANCH=stable
 AGENT_BIN="${AGENT_BIN:?set AGENT_BIN to the compiled heiniremote-agent}"
 WL_DIR="${WL_CLIPBOARD_DIR:-/usr/bin}"