Put a feed's address at the top of its settings, and drop the shared box (#167)

Asked for after the redesign went out: the box of settings the same for everyone (address, folder,
Directory category) held what a person reading the feed cannot and should not change. The address
moves to the top, under the feed's name, with its copy button, read-only except to an admin, who
can still follow a feed that moved from its failing banner. The folder and the category leave the
dialog.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/app.css

@@ -1066,6 +1066,8 @@ input[type=range]::-moz-range-thumb{width:12px;height:12px;border:0;border-radiu
 .fsethead .art{width:56px;height:56px;border-radius:12px;font-size:18px}
 .fsethead h3{margin:0;font-size:19px;line-height:1.25;letter-spacing:-.01em;overflow-wrap:anywhere}
 .fsethead p{margin:3px 0 0;font-size:12.5px;line-height:1.45;color:var(--dim)}
+.faddr{margin-bottom:18px}
+.moved{margin:2px 0 0;font-size:13px;color:var(--accent)}
 /* On or off, drawn as iOS draws it, as the app is on a phone (#53). The box is the real control,
    unseen over the track, so a click, a tap, the keyboard and a screen reader all reach it. */
 .switch{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;font-size:14px;font-weight:500;cursor:pointer}
@@ -1115,13 +1117,6 @@ input[type=range]::-moz-range-thumb{width:12px;height:12px;border:0;border-radiu
 .chipx:hover{background:var(--raise);color:var(--fg)}
 .chipx .i{width:9px;height:9px}
 .chips .chipin{flex:1 0 8ch;width:auto;min-width:0;padding:4px 6px;border:0;background:none}
-/* The feed's own settings, one copy for everyone and an admin's to change, set apart on the
-   page's own ground. */
-.fshared{margin-top:20px;padding:14px 16px 4px;border:1px solid var(--line);border-radius:10px;background:var(--bg)}
-.fshared h4{margin:0 0 12px;font-size:13px;font-weight:600}
-.fshared>.hint{margin:-6px 0 12px;font-size:12.5px;color:var(--dim)}
-.fshared .field input{background:var(--panel)}
-.moved{margin:-4px 0 12px;font-size:13px;color:var(--accent)}
 #toasts{position:fixed;bottom:88px;right:18px;display:flex;flex-direction:column;gap:8px;z-index:60}
 .toast{
   background:var(--raise);border:1px solid var(--line);border-radius:9px;
@@ -1339,7 +1334,7 @@ body:has(#player.on) #status{padding-bottom:3px}
   .fsetbody{padding:20px 16px 24px}
   .card.fset .fsetfoot{padding:12px 16px calc(12px + var(--safe-b))}
   .fsethead .art{width:64px;height:64px;border-radius:14px}
-  .fsethead p,.wcap,.cap,.fshared>.hint{font-size:14px}
+  .fsethead p,.wcap,.cap{font-size:14px}
   .switch,.flabel{font-size:17px}
   .switch{min-height:44px}
   .sw{width:51px;height:31px}
@@ -1352,7 +1347,6 @@ body:has(#player.on) #status{padding-bottom:3px}
   .chips{background:var(--panel2);border-color:var(--edge);border-radius:10px}
   .chip{background:var(--panel);font-size:15px;padding:5px 4px 5px 12px}
   .chipx{width:26px;height:26px}
-  .fshared{border-color:var(--edge);border-radius:14px}
   .fdeps{margin-left:12px}
   .fdepsin{padding-left:14px}
   .toast{border-radius:14px}
@@ -1490,8 +1484,6 @@ body:has(#player.on) #status{padding-bottom:3px}
   :root[data-theme="glass"] .sidefoot button{border-radius:10px}
 }
 :root[data-theme="glass"] .btn.primary{box-shadow:inset 0 1px 0 rgba(255,255,255,.35)}
-/* A feed's shared settings let the glass through, a shade deeper than the card. */
-:root[data-theme="glass"] .fshared{background:color-mix(in srgb,var(--bg) 55%,transparent);border-color:var(--glass-edge)}
 :root[data-theme="glass"] .card.fset .fsetfoot{border-top-color:var(--glass-edge);background:color-mix(in srgb,var(--panel) 60%,transparent)}
 /* On a phone the rim all round a small capsule or bar read as the outline #53 took away, so the
    light only catches the top edge there, and the bars at the top and bottom have none. */