fix(ui): explain the REALITY client version gate and drop the impossible placeholder (#6125)

* fix(ui): explain the REALITY client version gate and drop the impossible placeholder

An empty Min Client Ver looks unrestricted, but Xray-core silently
falls back to a built-in minimum (currently 26.3.27) that rejects
third-party cores such as Mihomo and sing-box with a bare REALITY
verification failure, and nothing in the panel points at the field.
Add tooltips to both version fields explaining the fallback and its
TLS-fingerprint-freshness rationale.

The Max Client Ver placeholder (25.9.11) sat below the built-in
minimum, so filling in both placeholders produced a range that
rejects every client. Remove it; empty genuinely means no upper
limit for that field.

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

* docs(reality): warn that an empty min client version rejects old cores

Common pitfalls covered bad targets, SNI mismatches, leaked keys and
wrong flow, but not the client version gate that currently bites
Mihomo and sing-box users. Add it to all four doc languages.

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

* fix(ui): word the version hints against the effective minimum

Address the automated review: the Max Client Ver hint said only 'not
lower than Min Client Ver', which re-establishes the empty-means-unset
mental model when the effective floor is the core's built-in minimum.
Both hints now name the effective minimum and tie the quoted 26.3.27
to the core build the panel runs, since operators can install any
Xray-core version.

Also from review: full-width quotes and a missing verb in the zh doc
bullet, the idiomatic Arabic opening, and a format-only x.y.z
placeholder on Max Client Ver so the field still conveys its shape.

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

---------

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

internal/web/translation/fa-IR.json

@@ -648,6 +648,8 @@
         "maxTimeDiff": "حداکثر اختلاف زمان (ms)",
         "minClientVer": "حداقل نسخه کلاینت",
         "maxClientVer": "حداکثر نسخه کلاینت",
+        "minClientVerHint": "خالی بودن به معنای بدون محدودیت نیست: در این حالت Xray-core حداقل داخلیِ نسخهٔ هسته‌ای را که اجرا می‌کنید (در نسخه‌های فعلی 26.3.27) اعمال می‌کند و کلاینت‌هایی را که نسخهٔ قدیمی‌تری اعلام می‌کنند رد می‌کند — از جمله هسته‌های شخص ثالث مانند Mihomo و sing-box. مقدار 1.0.0 آن‌ها را می‌پذیرد، به بهای پذیرش اثر انگشت‌های TLS قدیمی.",
+        "maxClientVerHint": "خالی یعنی بدون سقف. در صورت تنظیم، نباید از حداقلِ مؤثر — حداقل نسخه کلاینت، و در صورت خالی بودن آن فیلد، حداقل داخلی Xray-core — کمتر باشد، وگرنه همهٔ کلاینت‌ها رد می‌شوند.",
         "shortIds": "Short IDها",
         "realityTargetHint": "الزامی است. باید شامل پورت باشد (مثلاً example.com:443). بدون پورت، Xray-core اجرا نمی‌شود.",
         "realityTargetRequired": "هدف REALITY الزامی است",