server: accept a semver prerelease suffix in the product version

The validation added in #1084 rejected anything but digits and dots, which is
narrower than semver: a prerelease suffix after a hyphen is part of the spec,
and the native about page's ParseVersion already strips such a suffix for the
update check while displaying it verbatim. Allow exactly one hyphen segment of
[0-9A-Za-z.-] after the numeric body, so dev builds can embed
0.7.1-dev.20261019.<hash> and the about page shows the full string.
version.txt itself stays bare MAJOR.MINOR.PATCH and every release passes
unchanged.

lcompile-release.ps1 feeds the same override locally, so its ValidatePattern
loosens in step.

server/CMakeLists.txt

@@ -43,7 +43,10 @@ else()
     file(STRINGS "${MSIME_VERSION_FILE}" MSIME_PRODUCT_VERSION LIMIT_COUNT 1)
 endif()
 string(STRIP "${MSIME_PRODUCT_VERSION}" MSIME_PRODUCT_VERSION)
-if(NOT MSIME_PRODUCT_VERSION MATCHES "^[0-9]+(\\.[0-9]+)*$")
+# 版本主体必须是数字段；允许一个可选的连字符后缀（semver 预发布段），dev-build 用它携带
+# 日期与 commit（0.7.1-dev.20261019.<hash>），设置窗口关于页原样显示。关于页的 ParseVersion
+# 会剥掉后缀做更新检查的数字比较，所以后缀不影响版本判定。
+if(NOT MSIME_PRODUCT_VERSION MATCHES "^[0-9]+(\\.[0-9]+)*(-[0-9A-Za-z.-]+)?$")
     message(FATAL_ERROR "Invalid product version in ${MSIME_VERSION_FILE}: '${MSIME_PRODUCT_VERSION}'")
 endif()
 configure_file(

server/scripts/lcompile-release.ps1

@@ -2,7 +2,7 @@
 [CmdletBinding()]
 param(
     [string]$ManifestTool = 'C:\Program Files (x86)\Windows Kits\10\bin\10.0.26100.0\x64\mt.exe',
-    [ValidatePattern('^\d+\.\d+\.\d+$')]
+    [ValidatePattern('^\d+\.\d+\.\d+(-[0-9A-Za-z.-]+)?$')]
     [string]$ProductVersion = '',
     # ALL_BUILD also builds MetasequoiaImeServerTests and test_webview_contract, which the packaging
     # step deletes again. The server target already depends on the watchdog, the three panels,