fix: [hidden] must beat display:flex so archive/settings panels collapse

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BCrwHHnGCB5XH968Nxokqw

core/resources/views/inbox.blade.php

@@ -37,6 +37,7 @@ main{position:relative;z-index:1;max-width:880px;width:100%;margin:0 auto;paddin
 .panel>button.head{width:100%;display:flex;align-items:center;gap:14px;background:none;border:none;padding:18px 22px;cursor:pointer;text-align:left;color:var(--washi)}
 .panel .head .jp{font-family:'Shippori Mincho',serif;font-size:16px}.panel .head .meta{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.15em;color:var(--nibi)}.panel .head .chev{margin-left:auto;font-family:'Space Mono',monospace;font-size:11px;color:var(--nibi)}
 .panel .body{border-top:1px solid var(--hair);padding:18px 22px;display:flex;flex-direction:column;gap:10px}
+[hidden]{display:none!important}
 .addform{margin-bottom:52px;border:1px dashed var(--hair-2);border-radius:14px;background:rgba(17,21,46,.7);padding:22px}
 .label{font-family:'Space Mono',monospace;font-size:11px;letter-spacing:.3em;color:var(--kasumi);margin-bottom:16px}
 .row{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end}