feat: 媒体库 blob 去重存储与品牌/注册等前端调整

新增：
- blob_store 二进制去重存储 + blob_dedup 测试

其它：
- 后端 settings/auth/media_library/upload/operations 服务与 handler 调整
- 前端品牌（BrandLockup/BrandCropModal/BrandSeoPanel）、注册、媒体库、分析详情页、Header/SiteChrome 等更新

frontend/app/admin/settings/BasicIdentityPanel.tsx

@@ -2,7 +2,7 @@
 
 import { X } from "lucide-react";
 import { useEffect, useRef, useState } from "react";
-import { AdminField, AdminSettingsActions, AdminSettingsGroup } from "@/components/admin";
+import { AdminField, AdminSettingsActions, AdminSettingsGroup, AdminSwitch } from "@/components/admin";
 import { apiUpdateSiteSettings, apiOperations, type PublicSettings } from "@/lib/api";
 import { BRAND_LIMITS, runeCount, siteDocumentTitle } from "@/lib/brand";
 import { toast } from "@/lib/toast";
@@ -25,6 +25,7 @@ export default function BasicIdentityPanel({
   }, []);
   const [wordmark, setWordmark] = useState(initial.site_wordmark);
   const [slogan, setSlogan] = useState(initial.site_slogan);
+  const [sloganVisible, setSloganVisible] = useState(initial.brand_slogan_visible);
   const [desc, setDesc] = useState(initial.site_description);
   const [keywords, setKeywords] = useState<string[]>(initial.site_keywords);
   const [kwInput, setKwInput] = useState("");
@@ -32,6 +33,7 @@ export default function BasicIdentityPanel({
     name: initial.site_name,
     wordmark: initial.site_wordmark,
     slogan: initial.site_slogan,
+    sloganVisible: initial.brand_slogan_visible,
     desc: initial.site_description,
     keywords: initial.site_keywords,
   });
@@ -44,6 +46,7 @@ export default function BasicIdentityPanel({
     name.trim() !== saved.name ||
     wordmark.trim() !== saved.wordmark ||
     slogan.trim() !== saved.slogan ||
+    sloganVisible !== saved.sloganVisible ||
     desc.trim() !== saved.desc ||
     JSON.stringify(keywords) !== JSON.stringify(saved.keywords);
 
@@ -85,6 +88,7 @@ export default function BasicIdentityPanel({
     setName(saved.name);
     setWordmark(saved.wordmark);
     setSlogan(saved.slogan);
+    setSloganVisible(saved.sloganVisible);
     setDesc(saved.desc);
     setKeywords([...saved.keywords]);
     setKwInput("");
@@ -98,6 +102,7 @@ export default function BasicIdentityPanel({
       name: name.trim(),
       wordmark: wordmark.trim(),
       slogan: slogan.trim(),
+      sloganVisible,
       desc: desc.trim(),
       keywords: [...keywords],
     };
@@ -115,6 +120,7 @@ export default function BasicIdentityPanel({
         site_name: snap.name,
         site_wordmark: snap.wordmark,
         site_slogan: snap.slogan,
+        brand_slogan_visible: snap.sloganVisible,
         site_description: snap.desc,
         site_keywords: snap.keywords,
       });
@@ -123,12 +129,14 @@ export default function BasicIdentityPanel({
         name: res.site_name,
         wordmark: res.site_wordmark,
         slogan: res.site_slogan,
+        sloganVisible: res.brand_slogan_visible,
         desc: res.site_description,
         keywords: res.site_keywords,
       });
       setName((v) => (v.trim() === snap.name ? res.site_name : v));
       setWordmark((v) => (v.trim() === snap.wordmark ? res.site_wordmark : v));
       setSlogan((v) => (v.trim() === snap.slogan ? res.site_slogan : v));
+      setSloganVisible((v) => (v === snap.sloganVisible ? res.brand_slogan_visible : v));
       setDesc((v) => (v.trim() === snap.desc ? res.site_description : v));
       setKeywords((prev) =>
         JSON.stringify(prev) === JSON.stringify(snap.keywords) ? res.site_keywords : prev,
@@ -199,18 +207,49 @@ export default function BasicIdentityPanel({
           />
         </div>
 
-        <AdminField
-          id="site-slogan"
-          label="标语"
-          className="admin-identity-field"
-          maxLength={BRAND_LIMITS.slogan}
-          value={slogan}
-          onChange={(v) => {
-            setSlogan(v);
-            clearSaveError();
-          }}
-          placeholder="技术分享与讨论"
-        />
+        <div className="admin-identity-field">
+          <div className="admin-field-head">
+            <label className="field-label" htmlFor="site-slogan">
+              标语
+            </label>
+            <span className="admin-field-count" aria-hidden>
+              {slogan.length}/{BRAND_LIMITS.slogan}
+            </span>
+          </div>
+          <div
+            className="flex items-center gap-2 mb-2"
+            title={slogan.trim() ? "在页眉站名下方显示副标题" : "先填写标语后可开启"}
+          >
+            <AdminSwitch
+              checked={sloganVisible}
+              disabled={!slogan.trim()}
+              onChange={() => {
+                setSloganVisible((v) => !v);
+                clearSaveError();
+              }}
+              label="页眉显示标语"
+            />
+            <span
+              className="text-[12px]"
+              style={{ color: slogan.trim() ? "var(--ink-2)" : "var(--ink-3)" }}
+            >
+              页眉显示标语
+            </span>
+          </div>
+          <div className="admin-field-shell">
+            <input
+              id="site-slogan"
+              className="admin-field-input"
+              maxLength={BRAND_LIMITS.slogan}
+              value={slogan}
+              onChange={(e) => {
+                setSlogan(e.target.value);
+                clearSaveError();
+              }}
+              placeholder="技术分享与讨论"
+            />
+          </div>
+        </div>
         <p className="admin-identity-title-preview" aria-live="polite">
           浏览器标题预览 · <strong>{preview}</strong>
         </p>

frontend/app/admin/settings/BrandSeoPanel.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { Check, ImagePlus, Images, Link2, X } from "lucide-react";
+import { Check, Crop, ImagePlus, Images, Link2, X } from "lucide-react";
 import { useEffect, useRef, useState, type Dispatch, type SetStateAction } from "react";
 import {
   AdminSegmented,
@@ -11,8 +11,6 @@ import BrandCropModal from "@/components/BrandCropModal";
 import BrandLockup from "@/components/BrandLockup";
 import { apiBrandFromMedia, apiUpdateSiteSettings, apiUploadBrand, type PublicSettings } from "@/lib/api";
 import {
-  BRAND_LOGO_FITS,
-  BRAND_LOGO_SIZES,
   brandAccept,
   brandAliasPath,
   brandFileOk,
@@ -313,6 +311,17 @@ export default function BrandSeoPanel({
             >
               <Images size={14} /> 库
             </button>
+            {preview && !/\.(svg|ico)(\?.*)?$/i.test(preview) ? (
+              <button
+                type="button"
+                className="btn btn-line btn-sm"
+                disabled={saving}
+                title="调整画幅、铺法或重新裁剪"
+                onClick={() => openCrop(slot, null, preview)}
+              >
+                <Crop size={14} /> 调整
+              </button>
+            ) : null}
             <button
               type="button"
               className="admin-icon-btn"
@@ -361,7 +370,7 @@ export default function BrandSeoPanel({
               frame
               name={initial.site_name}
               wordmark={initial.site_wordmark}
-              slogan={initial.site_slogan}
+              slogan={initial.brand_slogan_visible ? initial.site_slogan : ""}
               logoLight={previewOf(light)}
               logoDark={previewOf(dark)}
             />
@@ -388,46 +397,9 @@ export default function BrandSeoPanel({
             />
           </div>
           {mark !== "text" ? (
-            <>
-              <div className="admin-brand-studio-field">
-                <span className="admin-brand-studio-kicker">比例</span>
-                <div className="admin-brand-size-row" role="group" aria-label="Logo 比例">
-                  {BRAND_LOGO_SIZES.map((item) => {
-                    const on = logoSize === item.id;
-                    return (
-                      <button
-                        key={item.id}
-                        type="button"
-                        className={`admin-brand-size-chip${on ? " is-on" : ""}`}
-                        onClick={() => {
-                          setLogoSize(item.id);
-                          if (saveError) setSaveError("");
-                        }}
-                      >
-                        <span className="admin-brand-size-chip-label">{item.label}</span>
-                        <span className="admin-brand-size-chip-px">
-                          {item.w}×{item.h}
-                        </span>
-                      </button>
-                    );
-                  })}
-                </div>
-              </div>
-              <div className="admin-brand-studio-field">
-                <span className="admin-brand-studio-kicker">铺法</span>
-                <AdminSegmented
-                  role="group"
-                  size="sm"
-                  ariaLabel="适配方式"
-                  value={logoFit}
-                  onChange={(v) => {
-                    setLogoFit(v);
-                    if (saveError) setSaveError("");
-                  }}
-                  options={BRAND_LOGO_FITS.map((item) => ({ key: item.id, label: item.label }))}
-                />
-              </div>
-            </>
+            <p className="admin-brand-studio-field text-[11.5px] self-center mb-0.5" style={{ color: "var(--ink-3)" }}>
+              画幅与铺法在上传/调整图片的裁剪弹窗中设置
+            </p>
           ) : null}
         </div>
 
@@ -471,6 +443,16 @@ export default function BrandSeoPanel({
           slot={cropSlot}
           seedFile={cropSeedFile}
           seedUrl={cropSeedUrl}
+          logoSize={logoSize}
+          logoFit={logoFit}
+          onSizeChange={(s) => {
+            setLogoSize(s);
+            if (saveError) setSaveError("");
+          }}
+          onFitChange={(f) => {
+            setLogoFit(f);
+            if (saveError) setSaveError("");
+          }}
           onClose={closeCrop}
           onSeedConsumed={() => {
             setCropSeedFile(null);