Full MVP: workspace layout, visual refresh, PWA, production deploy

Major changes since initial commit:

Schema: version branching (parentVersionId, branchLabel), share links,
guest comments, track status enum (sketch/in_progress/final/released),
track sections, cover art for projects and tracks.

API: 29+ endpoints — auth, projects, tracks, versions, comments, share
links (public + management), uploads (cover), activity feed, onboarding
demo seed. Email templates in German with brand styling.

Web: SvelteKit 5 workspace layout with persistent sidebar, breadcrumb
top-bar, collapsible right panel. SoundCloud-style waveform player with
round play button, avatar comment markers, keyboard shortcuts (Space/JKL/C).
Full German UI. Cover art with gradient fallback. Track status pills.
Activity feed dashboard. Welcome modal with demo-seed trigger. Landing
page with 7-section scroll layout. Login on /login. Public /listen/:token
page for guest feedback.

Visual: Inter Variable font, Magenta→Orange gradient accent, warm dark
neutrals, Lucide-style inline SVG icon set, spring animations on modals,
glass-effect toasts, responsive from 360px to 2560px+.

PWA: manifest, service worker, icons, iOS/Android installable.

Production: adapter-node, server-side API proxy hook, docker-compose with
Postgres + MinIO + auto-migration + health checks. Env example included.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/api/src/routes/versions.ts

@@ -1,7 +1,7 @@
 import { Hono } from 'hono';
 import { zValidator } from '@hono/zod-validator';
 import { eq, and, desc, asc, sql } from 'drizzle-orm';
-import { requestUploadUrlSchema, createVersionSchema } from '@music-hub/shared';
+import { requestUploadUrlSchema, createVersionSchema, updateVersionSchema } from '@music-hub/shared';
 import { tracks, versions, projectMembers } from '@music-hub/db';
 import { requireAuth } from '../middleware/auth.js';
 import { createUploadUrl, createDownloadUrl } from '../storage/s3.js';
@@ -115,6 +115,82 @@ export const versionRoutes = new Hono<AppEnv>()
     return c.json({ version }, 201);
   })
 
+  // Update label/notes/branchLabel
+  .patch('/:id', zValidator('json', updateVersionSchema), async (c) => {
+    const db = c.get('db');
+    const userId = c.get('userId');
+    const versionId = c.req.param('id');
+    const input = c.req.valid('json');
+
+    const [version] = await db
+      .select()
+      .from(versions)
+      .where(eq(versions.id, versionId))
+      .limit(1);
+    if (!version) return c.json({ error: 'Not found' }, 404);
+
+    const [track] = await db
+      .select()
+      .from(tracks)
+      .where(eq(tracks.id, version.trackId))
+      .limit(1);
+
+    const [membership] = await db
+      .select()
+      .from(projectMembers)
+      .where(
+        and(eq(projectMembers.projectId, track!.projectId), eq(projectMembers.userId, userId)),
+      )
+      .limit(1);
+
+    if (!membership || !membership.canUpload) {
+      return c.json({ error: 'Forbidden' }, 403);
+    }
+
+    const [updated] = await db
+      .update(versions)
+      .set(input)
+      .where(eq(versions.id, versionId))
+      .returning();
+
+    return c.json({ version: updated });
+  })
+
+  // Delete version
+  .delete('/:id', async (c) => {
+    const db = c.get('db');
+    const userId = c.get('userId');
+    const versionId = c.req.param('id');
+
+    const [version] = await db
+      .select()
+      .from(versions)
+      .where(eq(versions.id, versionId))
+      .limit(1);
+    if (!version) return c.json({ error: 'Not found' }, 404);
+
+    const [track] = await db
+      .select()
+      .from(tracks)
+      .where(eq(tracks.id, version.trackId))
+      .limit(1);
+
+    const [membership] = await db
+      .select()
+      .from(projectMembers)
+      .where(
+        and(eq(projectMembers.projectId, track!.projectId), eq(projectMembers.userId, userId)),
+      )
+      .limit(1);
+
+    if (!membership || membership.role !== 'owner') {
+      return c.json({ error: 'Forbidden' }, 403);
+    }
+
+    await db.delete(versions).where(eq(versions.id, versionId));
+    return c.json({ message: 'Version deleted' });
+  })
+
   // Get version tree (graph) for a track
   .get('/track/:trackId/tree', async (c) => {
     const db = c.get('db');