feat(design): the field family, the dropdown trigger, native controls, the no-raw-input lint rule (E28 S3c)

- ui/Input, Textarea, InnerInput + fieldClass (A4): the >= 3:1 edge, a 2px accent
  focus edge, the danger edge for invalid, md/sm/xs/heading rungs, 1rem and 44 on touch
- ui/SelectTrigger (A5): SortControl, FilterSelect, the view switcher and the date
  filter on one trigger, a pill in a toolbar, r8 in a form
- ui/NativeControls (A6): Checkbox, CheckRow, Slider, ColorInput
- every raw input swept (~100 sites); inputCls retired; local/input-primitive
- useReturnFocus: an in-place editor hands the focus back to its trigger on
  Enter/Escape (the playlist and Plex title renames, the priority number);
  the Plex playlist rename gains Escape and an accessible name
- back to top: a round 48 FAB (owner decision); DESIGN.md A2 and the log

frontend/src/components/VideoEditor.tsx

@@ -8,12 +8,12 @@ import Modal from "./ui/Modal";
 import { notify } from "../lib/notifications";
 import { api, type DownloadJob, type EditSpec } from "../lib/api";
 import { contentRect, cropToSourcePx, type Frac } from "../lib/cropGeometry";
-import { inputCls } from "./ui/form";
 import { Button } from "./ui/Button";
 import { failureReason, notifyActionError } from "../lib/actionErrors";
 import { markReported } from "../lib/api/core";
 import { IconButton } from "./ui/IconButton";
 import { Pressable } from "./ui/Pressable";
+import { Input } from "./ui/Input";
 
 // mm:ss.d timecode <-> seconds.
 function tc(s: number): string {
@@ -38,8 +38,6 @@ function parseTc(v: string): number | null {
 type Seg = { id: number; start: number; end: number; keep: boolean };
 type Drag = { type: "seek" } | { type: "boundary"; bi: number };
 
-const numCls =
-  "w-24 rounded-md bg-surface border border-border px-2 py-1 text-sm tabular-nums focus:outline-hidden focus:ring-2 focus:ring-accent/40";
 const MIN_SEG = 0.1;
 
 export default function VideoEditor({ job, onClose }: { job: DownloadJob; onClose: () => void }) {
@@ -583,7 +581,9 @@ export default function VideoEditor({ job, onClose }: { job: DownloadJob; onClos
             <div className="flex-1" />
             <label className="flex items-center gap-1 text-muted">
               {t("editor.in")}
-              <input
+              <Input
+                className="w-24 tabular-nums"
+                size="sm"
                 defaultValue={tc(sel.start)}
                 key={`s-${sel.id}-${sel.start}`}
                 disabled={selIdx === 0}
@@ -591,12 +591,13 @@ export default function VideoEditor({ job, onClose }: { job: DownloadJob; onClos
                   const v = parseTc(e.target.value);
                   if (v != null && selIdx > 0) moveBoundary(selIdx - 1, v);
                 }}
-                className={numCls}
               />
             </label>
             <label className="flex items-center gap-1 text-muted">
               {t("editor.out")}
-              <input
+              <Input
+                className="w-24 tabular-nums"
+                size="sm"
                 defaultValue={tc(sel.end)}
                 key={`e-${sel.id}-${sel.end}`}
                 disabled={selIdx === segments.length - 1}
@@ -604,7 +605,6 @@ export default function VideoEditor({ job, onClose }: { job: DownloadJob; onClos
                   const v = parseTc(e.target.value);
                   if (v != null && selIdx < segments.length - 1) moveBoundary(selIdx, v);
                 }}
-                className={numCls}
               />
             </label>
             <span className="text-xs text-muted tabular-nums w-16 text-right">
@@ -672,11 +672,11 @@ export default function VideoEditor({ job, onClose }: { job: DownloadJob; onClos
 
         <div>
           <label className="block text-sm font-medium mb-1">{t("editor.nameLabel")}</label>
-          <input
+          <Input
+            className="w-full"
             value={name}
             onChange={(e) => setName(e.target.value)}
             placeholder={defaultName}
-            className={inputCls}
           />
         </div>