feat(ui): validate the REALITY client version range at save time (#6126)

* feat(ui): validate the REALITY client version range at save time

The impossible range from PR #6125 — a max below the effective minimum
— could still be saved; the tooltip only helps a user who hovers it.
Add save-time validation mirroring xray-core's parser (up to three
dot-separated parts, each 0-255) on both fields, plus a cross-field
check that a non-empty max is not below a non-empty min. Errors are
field-level i18n keys following the REALITY target precedent, so the
modal stays open and points at the offending field instead of storing
a config that rejects every client.

A malformed min is reported by its own field and skipped by the max
comparison, so the user sees one precise error per field.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(ui): reject untrimmed client versions and revalidate max on min edits

From review: the validators trimmed but the save path ships the value
verbatim, and xray-core's part parser accepts no surrounding
whitespace — so a green form could still save a config the core
refuses to load. Reject any value that differs from its trimmed form.

Also revalidate the max field after a min edit when max already
shows an error, so correcting the min clears the stale cross-field
message without waiting for the next submit.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

internal/web/translation/zh-CN.json

@@ -658,6 +658,8 @@
         "maxClientVer": "最大客户端版本",
         "minClientVerHint": "留空不等于不限制：Xray-core 会改用所运行内核版本的内置最低值（当前版本为 26.3.27），拒绝自报版本更低的客户端——包括 Mihomo、sing-box 等第三方内核。填 1.0.0 可放行它们，代价是允许过时的 TLS 指纹。",
         "maxClientVerHint": "留空表示无上限。若填写，不得低于实际生效的下限——最小客户端版本，该字段留空时则为 Xray-core 的内置最低值——否则所有客户端都会被拒绝。",
+        "clientVerInvalid": "客户端版本须为最多三段以点分隔的数字，每段 0-255（例如 26.3.27）",
+        "maxClientVerBelowMin": "最大客户端版本不得低于最小客户端版本",
         "shortIds": "Short IDs",
         "realityTargetHint": "必填。必须包含端口（例如 example.com:443）。没有端口时 Xray-core 将无法启动。",
         "realityTargetRequired": "REALITY 目标为必填项",