feat(app): add song edit and delete with dropdown menu

app/app/components/add-song-sheet.tsx

@@ -60,9 +60,13 @@ export function AddSongSheet({ open, onOpenChange, onSongAdded }: Props) {
     setLoading(true);
     try {
       const stored = await createSong(
-        fileHtml ? { html: fileHtml } : { source: url.trim() }
+        fileHtml ? { html: fileHtml } : { source: url.trim() },
       );
-      onSongAdded({ id: stored.id, meta: stored.song.meta, preview_chords: previewChords(stored.song) });
+      onSongAdded({
+        id: stored.id,
+        meta: stored.song.meta,
+        preview_chords: previewChords(stored.song),
+      });
       onOpenChange(false);
       reset();
       navigate(`/songs/${stored.id}`);
@@ -127,12 +131,19 @@ export function AddSongSheet({ open, onOpenChange, onSongAdded }: Props) {
               type="button"
               variant="outline"
               className="flex-1"
-              onClick={() => { onOpenChange(false); reset(); }}
+              onClick={() => {
+                onOpenChange(false);
+                reset();
+              }}
               disabled={loading}
             >
               Cancel
             </Button>
-            <Button type="submit" className="flex-1" disabled={loading || (!url.trim() && !fileHtml)}>
+            <Button
+              type="submit"
+              className="flex-1"
+              disabled={loading || (!url.trim() && !fileHtml)}
+            >
               {loading ? "Importing..." : "Import"}
             </Button>
           </div>

app/app/components/delete-song-dialog.tsx

@@ -0,0 +1,56 @@
+import {
+  AlertDialog, AlertDialogAction, AlertDialogCancel,
+  AlertDialogContent, AlertDialogDescription, AlertDialogFooter,
+  AlertDialogHeader, AlertDialogTitle,
+} from "~/components/ui/alert-dialog";
+import { toast } from "sonner";
+import { deleteSong } from "~/lib/api";
+import { useNavigate } from "react-router";
+import { useState } from "react";
+
+interface Props {
+  id: string;
+  title: string;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+}
+
+export function DeleteSongDialog({ id, title, open, onOpenChange }: Props) {
+  const navigate = useNavigate();
+  const [loading, setLoading] = useState(false);
+
+  async function handleDelete() {
+    setLoading(true);
+    try {
+      await deleteSong(id);
+      navigate("/");
+    } catch {
+      toast.error("Failed to delete song");
+      setLoading(false);
+      onOpenChange(false);
+    }
+  }
+
+  return (
+    <AlertDialog open={open} onOpenChange={onOpenChange}>
+      <AlertDialogContent>
+        <AlertDialogHeader>
+          <AlertDialogTitle>Delete "{title}"?</AlertDialogTitle>
+          <AlertDialogDescription>
+            This cannot be undone. The song will be permanently removed.
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel disabled={loading}>Cancel</AlertDialogCancel>
+          <AlertDialogAction
+            onClick={handleDelete}
+            disabled={loading}
+            className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
+          >
+            {loading ? "Deleting..." : "Delete"}
+          </AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  );
+}

app/app/components/edit-song-sheet.tsx

@@ -0,0 +1,82 @@
+import { useState } from "react";
+import {
+  Sheet, SheetContent, SheetHeader, SheetTitle,
+} from "~/components/ui/sheet";
+import { Input } from "~/components/ui/input";
+import { Button } from "~/components/ui/button";
+import { toast } from "sonner";
+import { updateSong } from "~/lib/api";
+import type { SongMeta, SongSummary } from "~/lib/types";
+
+interface Props {
+  id: string;
+  meta: SongMeta;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  onUpdated: (summary: SongSummary) => void;
+}
+
+export function EditSongSheet({ id, meta, open, onOpenChange, onUpdated }: Props) {
+  const [title, setTitle] = useState(meta.title);
+  const [artist, setArtist] = useState(meta.artist);
+  const [key, setKey] = useState(meta.original_key ?? "");
+  const [loading, setLoading] = useState(false);
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    setLoading(true);
+    try {
+      const updated = await updateSong(id, {
+        title: title.trim() || undefined,
+        artist: artist.trim() || undefined,
+        original_key: key.trim() || undefined,
+      });
+      onUpdated(updated);
+      onOpenChange(false);
+    } catch (err) {
+      toast.error("Failed to save changes", {
+        description: err instanceof Error ? err.message : undefined,
+      });
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  return (
+    <Sheet open={open} onOpenChange={onOpenChange}>
+      <SheetContent side="bottom" className="rounded-t-xl">
+        <SheetHeader className="mb-4">
+          <SheetTitle>Edit Song</SheetTitle>
+        </SheetHeader>
+        <form onSubmit={handleSubmit} className="flex flex-col gap-3">
+          <div className="flex flex-col gap-1">
+            <label className="text-xs text-muted-foreground uppercase tracking-wide">Title</label>
+            <Input value={title} onChange={(e) => setTitle(e.target.value)} disabled={loading} />
+          </div>
+          <div className="flex flex-col gap-1">
+            <label className="text-xs text-muted-foreground uppercase tracking-wide">Artist</label>
+            <Input value={artist} onChange={(e) => setArtist(e.target.value)} disabled={loading} />
+          </div>
+          <div className="flex flex-col gap-1">
+            <label className="text-xs text-muted-foreground uppercase tracking-wide">Key</label>
+            <Input
+              value={key}
+              onChange={(e) => setKey(e.target.value)}
+              placeholder="e.g. Em, G, Bb"
+              disabled={loading}
+            />
+          </div>
+          <div className="flex gap-2 pt-1">
+            <Button type="button" variant="outline" className="flex-1"
+              onClick={() => onOpenChange(false)} disabled={loading}>
+              Cancel
+            </Button>
+            <Button type="submit" className="flex-1" disabled={loading}>
+              {loading ? "Saving..." : "Save"}
+            </Button>
+          </div>
+        </form>
+      </SheetContent>
+    </Sheet>
+  );
+}

app/app/components/transpose-bar.tsx

@@ -1,36 +1,59 @@
 import { useState } from "react";
 import { Button } from "~/components/ui/button";
-import { ChevronUp, ChevronDown, Minus, Plus } from "lucide-react";
+import {
+  DropdownMenu, DropdownMenuContent, DropdownMenuItem, DropdownMenuTrigger,
+} from "~/components/ui/dropdown-menu";
+import { ChevronUp, ChevronDown, Minus, Plus, MoreHorizontal, Pencil, Trash2 } from "lucide-react";
 import type { SongMeta } from "~/lib/types";
 
 interface Props {
   meta: SongMeta;
   offset: number;
   onOffsetChange: (offset: number) => void;
+  onEdit?: () => void;
+  onDelete?: () => void;
 }
 
-export function TransposeBar({ meta, offset, onOffsetChange }: Props) {
+export function TransposeBar({ meta, offset, onOffsetChange, onEdit, onDelete }: Props) {
   const [expanded, setExpanded] = useState(true);
 
-  const label = offset === 0
-    ? "±0"
-    : offset > 0
-    ? `+${offset}`
-    : `${offset}`;
+  const label = offset === 0 ? "±0" : offset > 0 ? `+${offset}` : `${offset}`;
+
+  const menuButton = (onEdit || onDelete) ? (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button variant="ghost" size="icon" className="h-7 w-7 shrink-0">
+          <MoreHorizontal className="w-4 h-4" />
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end">
+        {onEdit && (
+          <DropdownMenuItem onClick={onEdit}>
+            <Pencil className="w-4 h-4 mr-2" />
+            Edit
+          </DropdownMenuItem>
+        )}
+        {onDelete && (
+          <DropdownMenuItem onClick={onDelete} className="text-destructive focus:text-destructive">
+            <Trash2 className="w-4 h-4 mr-2" />
+            Delete
+          </DropdownMenuItem>
+        )}
+      </DropdownMenuContent>
+    </DropdownMenu>
+  ) : null;
 
   if (!expanded) {
     return (
       <div className="flex items-center justify-between px-4 py-2 border-b bg-background sticky top-0">
         <span className="text-sm font-semibold truncate">{meta.title}</span>
-        <Button
-          variant="ghost"
-          size="icon"
-          className="h-7 w-7"
-          onClick={() => setExpanded(true)}
-        >
+        <div className="flex items-center gap-1">
+          {menuButton}
+          <Button variant="ghost" size="icon" className="h-7 w-7" onClick={() => setExpanded(true)}>
             <ChevronDown className="w-4 h-4" />
           </Button>
         </div>
+      </div>
     );
   }
 
@@ -41,15 +64,13 @@ export function TransposeBar({ meta, offset, onOffsetChange }: Props) {
           <span className="font-bold text-base">{meta.title}</span>
           <span className="text-sm text-muted-foreground">{meta.artist}</span>
         </div>
-        <Button
-          variant="ghost"
-          size="icon"
-          className="h-7 w-7 shrink-0"
-          onClick={() => setExpanded(false)}
-        >
+        <div className="flex items-center gap-1">
+          {menuButton}
+          <Button variant="ghost" size="icon" className="h-7 w-7 shrink-0" onClick={() => setExpanded(false)}>
             <ChevronUp className="w-4 h-4" />
           </Button>
         </div>
+      </div>
 
       <div className="flex items-center justify-between">
         <div className="flex gap-3 text-xs text-muted-foreground">
@@ -57,25 +78,14 @@ export function TransposeBar({ meta, offset, onOffsetChange }: Props) {
           {meta.capo != null && <span>Capo: {meta.capo}</span>}
           {meta.tuning && <span>{meta.tuning}</span>}
         </div>
-
         <div className="flex items-center gap-2">
-          <Button
-            variant="ghost"
-            size="icon"
-            className="h-8 w-8"
-            onClick={() => onOffsetChange(Math.max(-11, offset - 1))}
-          >
+          <Button variant="ghost" size="icon" className="h-8 w-8"
+            onClick={() => onOffsetChange(Math.max(-11, offset - 1))}>
             <Minus className="w-4 h-4" />
           </Button>
-          <span className="w-8 text-center text-sm font-mono font-semibold">
-            {label}
-          </span>
-          <Button
-            variant="ghost"
-            size="icon"
-            className="h-8 w-8"
-            onClick={() => onOffsetChange(Math.min(11, offset + 1))}
-          >
+          <span className="w-8 text-center text-sm font-mono font-semibold">{label}</span>
+          <Button variant="ghost" size="icon" className="h-8 w-8"
+            onClick={() => onOffsetChange(Math.min(11, offset + 1))}>
             <Plus className="w-4 h-4" />
           </Button>
         </div>

app/app/routes/songs.$id.tsx

@@ -1,10 +1,13 @@
 import { useState } from "react";
-import { data } from "react-router";
+import { data, Link } from "react-router";
 import type { Route } from "./+types/songs.$id";
 import { TransposeBar } from "~/components/transpose-bar";
 import { ChordChart } from "~/components/chord-chart";
+import { EditSongSheet } from "~/components/edit-song-sheet";
+import { DeleteSongDialog } from "~/components/delete-song-dialog";
 import { transposeSong } from "~/lib/transpose";
 import { getSong } from "~/lib/api";
+import type { Song, SongSummary } from "~/lib/types";
 
 export function meta({ data }: Route.MetaArgs) {
   if (!data?.song) return [{ title: "PocketChords" }];
@@ -16,22 +19,67 @@ export function meta({ data }: Route.MetaArgs) {
 
 export async function loader({ params }: Route.LoaderArgs) {
   const id = params.id ?? "";
+  try {
     const song = await getSong(id);
     if (!song) throw data("Song not found", { status: 404 });
-  return { song };
+    return { song, id };
+  } catch (err: unknown) {
+    if (err && typeof err === "object" && "status" in err && (err as { status: number }).status === 404) {
+      throw err;
+    }
+    return { song: null as unknown as Song, id };
+  }
 }
 
 export default function SongDetail({ loaderData }: Route.ComponentProps) {
-  const { song } = loaderData;
+  const { song: initialSong, id } = loaderData;
+  const [song, setSong] = useState<Song | null>(initialSong ?? null);
   const [offset, setOffset] = useState(0);
-  const displayed = transposeSong(song, offset);
+  const [editOpen, setEditOpen] = useState(false);
+  const [deleteOpen, setDeleteOpen] = useState(false);
 
+  if (!song) {
     return (
-    <div className="flex flex-col h-dvh max-w-lg mx-auto">
-      <TransposeBar meta={song.meta} offset={offset} onOffsetChange={setOffset} />
-      <div className="flex-1 overflow-y-auto">
-        <ChordChart sections={displayed.sections} />
-      </div>
+      <div className="flex flex-col items-center justify-center h-full gap-4">
+        <p className="text-muted-foreground text-sm">Song not found or unavailable.</p>
+        <Link to="/" className="text-sm text-primary underline-offset-4 hover:underline">
+          ← Back to library
+        </Link>
+      </div>
+    );
+  }
+
+  const displayed = transposeSong(song, offset);
+
+  function handleUpdated(summary: SongSummary) {
+    setSong((prev) => prev ? { ...prev, meta: summary.meta } : prev);
+  }
+
+  return (
+    <div className="flex flex-col h-full max-w-lg mx-auto">
+      <TransposeBar
+        meta={song.meta}
+        offset={offset}
+        onOffsetChange={setOffset}
+        onEdit={() => setEditOpen(true)}
+        onDelete={() => setDeleteOpen(true)}
+      />
+      <div className="flex-1 overflow-y-auto">
+        <ChordChart sections={displayed.sections} />
+      </div>
+      <EditSongSheet
+        id={id}
+        meta={song.meta}
+        open={editOpen}
+        onOpenChange={setEditOpen}
+        onUpdated={handleUpdated}
+      />
+      <DeleteSongDialog
+        id={id}
+        title={song.meta.title}
+        open={deleteOpen}
+        onOpenChange={setDeleteOpen}
+      />
     </div>
   );
 }