feat(client): Version helper + sync-version script; project.godot config/version

- Add scripts/sync-version to sync root /VERSION into client/project.godot
- Add Version GDScript helper (reads application/config/version)
- Test coverage: 2 tests for Version.string() and footer()
- Synced config/version="0.01-alpha" to project.godot

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

client/project.godot

@@ -11,6 +11,7 @@ config_version=5
 [application]
 
 config/name="coc-rpg"
+config/version="0.01-alpha"
 config/description="AI-driven single-player party RPG. Code owns state. AI owns text."
 config/features=PackedStringArray("4.7")
 

client/scripts/util/version.gd

@@ -0,0 +1,18 @@
+class_name Version
+extends RefCounted
+## The client's view of the single source of truth (/VERSION, charter §4). The
+## value is baked into project.godot's application/config/version by
+## scripts/sync-version on each bump; read it via ProjectSettings so an exported
+## build (which has no repo-root /VERSION) still knows its own version.
+
+const SETTING := "application/config/version"
+const LAST_RESORT := "0.0.0-dev"
+
+
+func string() -> String:
+	var v := str(ProjectSettings.get_setting(SETTING, ""))
+	return v if v != "" else LAST_RESORT
+
+
+func footer() -> String:
+	return "v%s · BUILT IN GODOT 4.7 · © 2026" % string()

client/scripts/util/version.gd.uid

@@ -0,0 +1 @@
+uid://xyvm7nhkf8be

client/tests/unit/test_version.gd

@@ -0,0 +1,13 @@
+extends "res://addons/gut/test.gd"
+
+
+func test_string_matches_project_setting():
+	var expected := str(ProjectSettings.get_setting("application/config/version", ""))
+	assert_ne(expected, "", "project.godot must carry application/config/version (run scripts/sync-version)")
+	assert_eq(Version.new().string(), expected)
+
+
+func test_footer_contains_version_and_engine():
+	var v := Version.new()
+	assert_string_contains(v.footer(), v.string())
+	assert_string_contains(v.footer(), "BUILT IN GODOT 4.7")

client/tests/unit/test_version.gd.uid

@@ -0,0 +1 @@
+uid://co7wtt67t2p7d

scripts/sync-version

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# Sync the single source of truth (/VERSION) into the Godot client's project.godot
+# (application/config/version). Run after bumping /VERSION.
+set -euo pipefail
+root="$(cd "$(dirname "$0")/.." && pwd)"
+version="$(tr -d '[:space:]' < "$root/VERSION")"
+proj="$root/client/project.godot"
+if grep -q '^config/version=' "$proj"; then
+  sed -i "s|^config/version=.*|config/version=\"$version\"|" "$proj"
+else
+  sed -i "s|^\(config/name=.*\)|\1\nconfig/version=\"$version\"|" "$proj"
+fi
+echo "synced client config/version = \"$version\""