chore(assets): migrate zibll img resources to assets/img

Copy Zibll's widget/visual reference assets into assets/img for
1:1 replication (Phase 5 resource migration):
- slider-bg.jpg, slider-layer-1.png, slider-layer-2.png
- user_t.jpg, avatar-default.png
- null*.svg (null, null-2, null-cap, null-love, null-money,
  null-order, null-post, null-search, null-set, null-user)
- thumbnail*.svg (thumbnail, thumbnail-lg, thumbnail-sm,
  thumbnail-null)
- medal/ (31 medal-*.svg badges)

These are reference placeholders to be progressively replaced;
no CSF framework ported. user-level-1..10.png already present.

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

assets/img/medal/medal-23.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 484.83 484.83"><defs><style>.cls-1{fill:none;}.cls-2{isolation:isolate;}.cls-3{fill:url(#未命名的渐变_95);}.cls-4{fill:url(#未命名的渐变_95-2);}.cls-5{fill:url(#未命名的渐变_95-3);}.cls-6{fill:url(#未命名的渐变_105);}.cls-7{fill:url(#未命名的渐变_95-4);}.cls-44,.cls-8{mix-blend-mode:multiply;}.cls-8{opacity:0.35;}.cls-9{fill:#9e600b;}.cls-10{clip-path:url(#clip-path);}.cls-11{fill:#955a07;}.cls-12{fill:#995c09;}.cls-13{fill:#9d5f0b;}.cls-14{fill:#a0610d;}.cls-15{fill:#a4640e;}.cls-16{fill:#a86610;}.cls-17{fill:#ac6912;}.cls-18{clip-path:url(#clip-path-2);}.cls-19{fill:#af6b13;}.cls-20{fill:#b36e15;}.cls-21{clip-path:url(#clip-path-3);}.cls-22{clip-path:url(#clip-path-4);}.cls-23{clip-path:url(#clip-path-5);}.cls-24{fill:#915704;}.cls-25{fill:#b56f15;}.cls-26{clip-path:url(#clip-path-6);}.cls-27{clip-path:url(#clip-path-7);}.cls-28{clip-path:url(#clip-path-8);}.cls-29{clip-path:url(#clip-path-9);}.cls-30{clip-path:url(#clip-path-10);}.cls-31{clip-path:url(#clip-path-11);}.cls-32{clip-path:url(#clip-path-12);}.cls-33{fill:#ab6811;}.cls-34{clip-path:url(#clip-path-13);}.cls-35{clip-path:url(#clip-path-14);}.cls-36{clip-path:url(#clip-path-15);}.cls-37{clip-path:url(#clip-path-16);}.cls-38{clip-path:url(#clip-path-17);}.cls-39{fill:url(#未命名的渐变_58);}.cls-40{clip-path:url(#clip-path-18);}.cls-41{fill:url(#未命名的渐变_105-2);}.cls-42{fill:url(#未命名的渐变_95-5);}.cls-43{fill:url(#未命名的渐变_95-6);}.cls-44{opacity:0.4;}.cls-45{fill:#9a9b9b;}.cls-46{clip-path:url(#clip-path-19);}.cls-47{fill:#9f9fa0;}.cls-48{fill:#a3a3a4;}.cls-49{fill:#a7a8a8;}.cls-50{fill:#abacac;}.cls-51{clip-path:url(#clip-path-20);}.cls-52{clip-path:url(#clip-path-21);}.cls-53{fill:#a3a3a3;}.cls-54{clip-path:url(#clip-path-22);}.cls-55{fill:#b7b8b8;}.cls-56{clip-path:url(#clip-path-23);}.cls-57{fill:#afb0b0;}.cls-58{fill:#b3b4b4;}.cls-59{clip-path:url(#clip-path-24);}.cls-60{fill:#858585;}.cls-61{clip-path:url(#clip-path-25);}.cls-62{clip-path:url(#clip-path-26);}.cls-63{clip-path:url(#clip-path-27);}.cls-64{clip-path:url(#clip-path-28);}.cls-65{clip-path:url(#clip-path-29);}.cls-66{fill:gray;}.cls-67{clip-path:url(#clip-path-30);}.cls-68{clip-path:url(#clip-path-31);}.cls-69{clip-path:url(#clip-path-32);}.cls-70{clip-path:url(#clip-path-33);}.cls-71{clip-path:url(#clip-path-34);}.cls-72{clip-path:url(#clip-path-35);}.cls-73{fill:#9e9e9e;}.cls-74{fill:#999;}.cls-75{fill:#949494;}.cls-76{fill:#8f8f8f;}.cls-77{fill:#8a8a8a;}.cls-78{clip-path:url(#clip-path-36);}.cls-79{fill:#868686;}.cls-80{fill:#a0a0a0;}.cls-81{clip-path:url(#clip-path-37);}.cls-82{fill:#afafb0;}.cls-83{clip-path:url(#clip-path-38);}.cls-84{clip-path:url(#clip-path-39);}.cls-85{clip-path:url(#clip-path-40);}.cls-86{clip-path:url(#clip-path-41);}.cls-87{clip-path:url(#clip-path-42);}.cls-88{clip-path:url(#clip-path-43);}.cls-89{fill:#9b9b9c;}.cls-90{clip-path:url(#clip-path-44);}.cls-91{fill:#9f9f9f;}.cls-92{fill:#b4b5b5;}.cls-93{fill:#dedede;}.cls-94{clip-path:url(#clip-path-45);}.cls-95{fill:#e2e3e3;}.cls-96{clip-path:url(#clip-path-46);}.cls-97{clip-path:url(#clip-path-47);}.cls-98{clip-path:url(#clip-path-48);}.cls-99{clip-path:url(#clip-path-49);}.cls-100{clip-path:url(#clip-path-50);}.cls-101{clip-path:url(#clip-path-51);}.cls-102{clip-path:url(#clip-path-52);}.cls-103{clip-path:url(#clip-path-53);}.cls-104{clip-path:url(#clip-path-54);}.cls-105{clip-path:url(#clip-path-55);}.cls-106{clip-path:url(#clip-path-56);}.cls-107{clip-path:url(#clip-path-57);}.cls-108{clip-path:url(#clip-path-58);}.cls-109{clip-path:url(#clip-path-59);}.cls-110{clip-path:url(#clip-path-60);}.cls-111{clip-path:url(#clip-path-61);}.cls-112{clip-path:url(#clip-path-62);}.cls-113{clip-path:url(#clip-path-63);}.cls-114{clip-path:url(#clip-path-64);}.cls-115{fill:#9fa0a0;}.cls-116{clip-path:url(#clip-path-65);}.cls-117{clip-path:url(#clip-path-66);}.cls-118{clip-path:url(#clip-path-67);}.cls-119{clip-path:url(#clip-path-68);}.cls-120{clip-path:url(#clip-path-69);}.cls-121{clip-path:url(#clip-path-70);}.cls-122{clip-path:url(#clip-path-71);}.cls-123{clip-path:url(#clip-path-72);}.cls-124{clip-path:url(#clip-path-73);}.cls-125{clip-path:url(#clip-path-74);}.cls-126{clip-path:url(#clip-path-75);}.cls-127{clip-path:url(#clip-path-76);}.cls-128{clip-path:url(#clip-path-77);}.cls-129{clip-path:url(#clip-path-78);}.cls-130{clip-path:url(#clip-path-79);}.cls-131{clip-path:url(#clip-path-80);}.cls-132{clip-path:url(#clip-path-81);}.cls-133{clip-path:url(#clip-path-82);}.cls-134{clip-path:url(#clip-path-83);}.cls-135{clip-path:url(#clip-path-84);}.cls-136{clip-path:url(#clip-path-85);}.cls-137{clip-path:url(#clip-path-86);}.cls-138{clip-path:url(#clip-path-87);}.cls-139{clip-path:url(#clip-path-88);}.cls-140{clip-path:url(#clip-path-89);}.cls-141{clip-path:url(#clip-path-90);}.cls-142{clip-path:url(#clip-path-91);}.cls-143{clip-path:url(#clip-path-92);}.clsLine truncated