Rework song player view to match design system

- New split layout: waveform/transport/queue left, comment panel right
- Avatar pins above waveform positioned by timestamp with hover tooltips
- Transport bar: speed selector, ±30s skip, 46px amber play/pause, volume
- Comment compose: live timestamp pill, suggestion/issue/keeper tag buttons
- Comment list: per-author colour avatars, amber timestamp seek chips,
  playhead-proximity highlight, delete only shown on own comments
- Queue panel showing other songs in the same session
- Waveform colours updated to amber/dim palette (104px height)
- Add GET /songs/{song_id} endpoint for song metadata
- Add tag field to SongComment (model, schema, router, migration 0005)
- Fix migration 0005 down_revision to use short ID "0004"
- Fix ESLint no-unused-expressions in keyboard shortcut handler

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/alembic/versions/0005_comment_tag.py

@@ -0,0 +1,25 @@
+"""Add tag column to song_comments
+
+Revision ID: 0005_comment_tag
+Revises: 0004_rehearsal_sessions
+Create Date: 2026-04-06
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "0005_comment_tag"
+down_revision = "0004"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "song_comments",
+        sa.Column("tag", sa.String(length=32), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("song_comments", "tag")

api/src/rehearsalhub/db/models.py

@@ -207,6 +207,7 @@ class SongComment(Base):
     )
     body: Mapped[str] = mapped_column(Text, nullable=False)
     timestamp: Mapped[Optional[float]] = mapped_column(Numeric(10, 2), nullable=True)
+    tag: Mapped[Optional[str]] = mapped_column(String(32), nullable=True)
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), server_default=func.now(), nullable=False
     )

api/src/rehearsalhub/routers/songs.py

@@ -89,6 +89,24 @@ async def search_songs(
     ]
 
 
+@router.get("/songs/{song_id}", response_model=SongRead)
+async def get_song(
+    song_id: uuid.UUID,
+    session: AsyncSession = Depends(get_session),
+    current_member: Member = Depends(get_current_member),
+):
+    song_repo = SongRepository(session)
+    song = await song_repo.get_with_versions(song_id)
+    if song is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Song not found")
+    band_svc = BandService(session)
+    try:
+        await band_svc.assert_membership(song.band_id, current_member.id)
+    except PermissionError:
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Not a member")
+    return SongRead.model_validate(song).model_copy(update={"version_count": len(song.versions)})
+
+
 @router.patch("/songs/{song_id}", response_model=SongRead)
 async def update_song(
     song_id: uuid.UUID,
@@ -264,7 +282,7 @@ async def create_comment(
 ):
     await _assert_song_membership(song_id, current_member.id, session)
     repo = CommentRepository(session)
-    comment = await repo.create(song_id=song_id, author_id=current_member.id, body=data.body, timestamp=data.timestamp)
+    comment = await repo.create(song_id=song_id, author_id=current_member.id, body=data.body, timestamp=data.timestamp, tag=data.tag)
     comment = await repo.get_with_author(comment.id)
     return SongCommentRead.from_model(comment)
 

api/src/rehearsalhub/schemas/comment.py

@@ -9,6 +9,7 @@ from pydantic import BaseModel, ConfigDict
 class SongCommentCreate(BaseModel):
     body: str
     timestamp: float | None = None
+    tag: str | None = None
 
 
 class SongCommentRead(BaseModel):
@@ -21,6 +22,7 @@ class SongCommentRead(BaseModel):
     author_name: str
     author_avatar_url: str | None
     timestamp: float | None
+    tag: str | None
     created_at: datetime
 
     @classmethod
@@ -33,5 +35,6 @@ class SongCommentRead(BaseModel):
             author_name=getattr(getattr(c, "author"), "display_name"),
             author_avatar_url=getattr(getattr(c, "author"), "avatar_url"),
             timestamp=getattr(c, "timestamp"),
+            tag=getattr(c, "tag", None),
             created_at=getattr(c, "created_at"),
         )

web/src/hooks/useWaveform.ts

@@ -23,6 +23,7 @@ export function useWaveform(
   const [isPlaying, setIsPlaying] = useState(false);
   const [isReady, setIsReady] = useState(false);
   const [currentTime, setCurrentTime] = useState(0);
+  const [duration, setDuration] = useState(0);
   const wasPlayingRef = useRef(false);
   const markersRef = useRef<CommentMarker[]>([]);
 
@@ -31,12 +32,12 @@ export function useWaveform(
 
     const ws = WaveSurfer.create({
       container: containerRef.current,
-      waveColor: "#2A3050",
-      progressColor: "#F0A840",
-      cursorColor: "#FFD080",
+      waveColor: "rgba(255,255,255,0.09)",
+      progressColor: "#c8861a",
+      cursorColor: "#e8a22a",
       barWidth: 2,
       barRadius: 2,
-      height: 80,
+      height: 104,
       normalize: true,
     });
 
@@ -45,6 +46,7 @@ export function useWaveform(
 
     ws.on("ready", () => {
       setIsReady(true);
+      setDuration(ws.getDuration());
       options.onReady?.(ws.getDuration());
       // Reset playing state when switching versions
       setIsPlaying(false);
@@ -141,7 +143,7 @@ export function useWaveform(
     markersRef.current = [];
   };
 
-  return { isPlaying, isReady, currentTime, play, pause, seekTo, addMarker, clearMarkers };
+  return { isPlaying, isReady, currentTime, duration, play, pause, seekTo, addMarker, clearMarkers };
 }
 
 function formatTime(seconds: number): string {

worker/src/worker/pipeline/waveform.py

@@ -7,7 +7,7 @@ import json
 import numpy as np
 
 
-def extract_peaks(audio: np.ndarray, num_points: int = 1000) -> list[float]:
+def extract_peaks(audio: np.ndarray, num_points: int = 500) -> list[float]:
     """
     Downsample audio to `num_points` RMS+peak values for waveform display.
     Returns a flat list of [peak, peak, ...] normalized to 0-1.