diff --git a/apps/api/src/index.ts b/apps/api/src/index.ts
index ebda7c3..8a2701a 100644
--- a/apps/api/src/index.ts
+++ b/apps/api/src/index.ts
@@ -65,37 +65,9 @@ const app = new Hono<AppEnv>()
   })
   .onError((err, c) => {
     console.error('Unhandled error:', err);
-    return c.json({ error: err.message }, 500);
+    return c.json({ error: 'Internal server error' }, 500);
   })
   .get('/health', (c) => c.json({ status: 'ok' }))
-  .get('/migrate', async (c) => {
-    try {
-      const fs = await import('fs');
-      const pathMod = await import('path');
-      const { sql: dsql } = await import('drizzle-orm');
-      const folder = pathMod.resolve(process.cwd(), 'packages/db/src/migrations');
-      const journal = JSON.parse(fs.readFileSync(pathMod.join(folder, 'meta', '_journal.json'), 'utf8'));
-      const results: string[] = [];
-      for (const entry of journal.entries) {
-        const sqlFile = pathMod.join(folder, `${entry.tag}.sql`);
-        if (!fs.existsSync(sqlFile)) { results.push(`skip: ${entry.tag} (not found)`); continue; }
-        const rawSql = fs.readFileSync(sqlFile, 'utf8');
-        const statements = rawSql.split('--> statement-breakpoint').map((s: string) => s.trim()).filter(Boolean);
-        for (const stmt of statements) {
-          try {
-            await db.execute(dsql.raw(stmt));
-          } catch (err: any) {
-            if (err.message?.includes('already exists') || err.message?.includes('duplicate')) continue;
-            results.push(`error in ${entry.tag}: ${err.message?.slice(0, 150)}`);
-          }
-        }
-        results.push(`ok: ${entry.tag}`);
-      }
-      return c.json({ status: 'ok', results });
-    } catch (err: any) {
-      return c.json({ status: 'error', message: err.message }, 500);
-    }
-  })
   .basePath('/api/v1')
   .route('/auth', authRoutes)
   .route('/projects', projectRoutes)
diff --git a/apps/api/src/routes/auth.ts b/apps/api/src/routes/auth.ts
index 9525229..10668ea 100644
--- a/apps/api/src/routes/auth.ts
+++ b/apps/api/src/routes/auth.ts
@@ -16,6 +16,7 @@ async function createSession(c: any, db: any, userId: string) {
   setCookie(c, 'session', sessionToken, {
     httpOnly: true,
     sameSite: 'lax',
+    secure: process.env.NODE_ENV === 'production',
     path: '/',
     maxAge: 30 * 24 * 60 * 60,
   });
@@ -64,11 +65,12 @@ export const authRoutes = new Hono<AppEnv>()
     const db = c.get('db');
 
     const token = generateToken();
+    const tokenHash = await hashToken(token);
     const expiresAt = new Date(Date.now() + 15 * 60 * 1000); // 15 min
 
     await db.insert(magicLinks).values({
       email,
-      token,
+      token: tokenHash,
       expiresAt,
     });
 
@@ -81,10 +83,11 @@ export const authRoutes = new Hono<AppEnv>()
     const { token } = c.req.valid('json');
     const db = c.get('db');
 
+    const tokenHash = await hashToken(token);
     const [link] = await db
       .select()
       .from(magicLinks)
-      .where(eq(magicLinks.token, token))
+      .where(eq(magicLinks.token, tokenHash))
       .limit(1);
 
     if (!link || link.expiresAt < new Date() || link.usedAt) {
diff --git a/apps/api/src/routes/comments.ts b/apps/api/src/routes/comments.ts
index b6f7080..25f521a 100644
--- a/apps/api/src/routes/comments.ts
+++ b/apps/api/src/routes/comments.ts
@@ -158,15 +158,29 @@ export const commentRoutes = new Hono<AppEnv>()
   // Resolve comment
   .post('/:id/resolve', async (c) => {
     const db = c.get('db');
+    const userId = c.get('userId');
     const commentId = c.req.param('id');
 
+    const [comment] = await db.select().from(comments).where(eq(comments.id, commentId)).limit(1);
+    if (!comment) return c.json({ error: 'Not found' }, 404);
+
+    const [version] = await db.select().from(versions).where(eq(versions.id, comment.versionId)).limit(1);
+    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.canComment && !membership.canApprove)) {
+      return c.json({ error: 'Forbidden' }, 403);
+    }
+
     const [updated] = await db
       .update(comments)
       .set({ resolvedAt: new Date() })
       .where(eq(comments.id, commentId))
       .returning();
 
-    if (!updated) return c.json({ error: 'Not found' }, 404);
-
     return c.json({ comment: updated });
   });
diff --git a/apps/api/src/routes/projects.ts b/apps/api/src/routes/projects.ts
index 8991d9a..0b58137 100644
--- a/apps/api/src/routes/projects.ts
+++ b/apps/api/src/routes/projects.ts
@@ -266,7 +266,7 @@ export const projectRoutes = new Hono<AppEnv>()
     const [updated] = await db
       .update(projectMembers)
       .set({ role: newRole, ...defaults })
-      .where(eq(projectMembers.id, memberId))
+      .where(and(eq(projectMembers.id, memberId), eq(projectMembers.projectId, projectId)))
       .returning();
 
     return c.json({ member: updated });
@@ -294,7 +294,7 @@ export const projectRoutes = new Hono<AppEnv>()
       return c.json({ error: 'Forbidden' }, 403);
     }
 
-    await db.delete(projectMembers).where(eq(projectMembers.id, memberId));
+    await db.delete(projectMembers).where(and(eq(projectMembers.id, memberId), eq(projectMembers.projectId, projectId)));
     return c.json({ message: 'Member removed' });
   });
 
diff --git a/apps/api/src/routes/versions.ts b/apps/api/src/routes/versions.ts
index 6797686..2c7d907 100644
--- a/apps/api/src/routes/versions.ts
+++ b/apps/api/src/routes/versions.ts
@@ -81,6 +81,23 @@ export const versionRoutes = new Hono<AppEnv>()
     const [track] = await db.select().from(tracks).where(eq(tracks.id, trackId)).limit(1);
     if (!track) return c.json({ error: 'Not found' }, 404);
 
+    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 expectedPrefix = `projects/${track.projectId}/tracks/${trackId}/`;
+    if (!input.fileKey.startsWith(expectedPrefix)) {
+      return c.json({ error: 'Forbidden' }, 403);
+    }
+
     // Get next version number
     const [latest] = await db
       .select({ maxVersion: sql<number>`coalesce(max(${versions.versionNumber}), 0)` })
@@ -269,16 +286,20 @@ export const versionRoutes = new Hono<AppEnv>()
   // Get stream URL
   .get('/:id/stream-url', 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);
-
+    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) return c.json({ error: 'Not found' }, 404);
+
     const key = version.streamFileKey || version.originalFileKey;
     const url = await createDownloadUrl(key);
 
@@ -288,16 +309,20 @@ export const versionRoutes = new Hono<AppEnv>()
   // Get download URL
   .get('/:id/download-url', 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);
-
+    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) return c.json({ error: 'Not found' }, 404);
+
     const url = await createDownloadUrl(version.originalFileKey);
     return c.json({ url });
   })
@@ -305,17 +330,19 @@ export const versionRoutes = new Hono<AppEnv>()
   // Get waveform data
   .get('/:id/waveform', 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);
+    const [version] = await db.select().from(versions).where(eq(versions.id, versionId)).limit(1);
+    if (!version || !version.waveformDataKey) return c.json({ error: 'Not found' }, 404);
 
-    if (!version || !version.waveformDataKey) {
-      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) return c.json({ error: 'Not found' }, 404);
 
     const url = await createDownloadUrl(version.waveformDataKey);
     return c.json({ url });
diff --git a/apps/web/src/lib/components/audio/StemUploadDropzone.svelte b/apps/web/src/lib/components/audio/StemUploadDropzone.svelte
index 0553fe5..d20afe3 100644
--- a/apps/web/src/lib/components/audio/StemUploadDropzone.svelte
+++ b/apps/web/src/lib/components/audio/StemUploadDropzone.svelte
@@ -124,7 +124,7 @@
       accept="audio/*"
       multiple
       onchange={handleFileSelect}
-      hidden
+      style="position:absolute;width:1px;height:1px;opacity:0;pointer-events:none;"
     />
     <div class="dropzone-content">
       <span class="icon"><Icon name="upload" size={24} /></span>