refactor: retire legacy gallery pages and confirm terminal unbinding

pigway_frame_flow/web/style.css

@@ -172,12 +172,6 @@ body.login-mode header,body.login-mode footer{flex-shrink:0}
 .image-card .actions{gap:6px}
 .image-card .actions button{white-space:nowrap}
 
-.gallery-filters{align-items:end}
-.gallery-filters-local{grid-template-columns:repeat(4,minmax(0,1fr))}
-.gallery-filters .field{min-width:0}
-@media(max-width:1050px){.gallery-filters{grid-template-columns:repeat(2,minmax(0,1fr))}}
-@media(max-width:720px){.gallery-filters{grid-template-columns:minmax(0,1fr)}}
-.gallery-filters input,.gallery-filters select{height:46px}
 
 .automation-status{color:var(--accent)}
 .automation-table td{vertical-align:middle}
@@ -248,16 +242,12 @@ form#history-filters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
 @media(max-width:1050px){form#history-filters{grid-template-columns:repeat(2,minmax(0,1fr))}}
 @media(max-width:720px){form#history-filters{grid-template-columns:minmax(0,1fr)}}
 
-.source-photo{min-width:0;display:flex;flex-direction:column;gap:12px;padding:14px;border:1px solid var(--border);border-radius:12px}
-.source-photo>[data-source-item]{width:100%;text-align:left;overflow-wrap:anywhere}
-.source-photo .actions{margin-top:auto}
 .excluded-photo{display:block;color:var(--muted);font-size:12px}
 
 .image-card>small{display:block}
 .photo-mark{display:block;color:var(--accent);font-size:12px}
 
 .image-card{display:flex;flex-direction:column}
-.image-card>.asset-select{align-self:flex-start}
 .image-card>.actions{margin-top:auto;padding-top:12px;justify-content:flex-start}
 
 .disabled-mark-hint{display:inline-flex;max-width:100%;cursor:help}