feat: enhance task persistence and implement centralized kanban board

app/server/api/tasks.get.ts

@@ -0,0 +1,56 @@
+import { requireAuth } from '~/server/utils/auth'
+import { prisma } from '~/server/utils/prisma'
+
+export default defineEventHandler(async (event) => {
+  const user = requireAuth(event)
+
+  const userGroups = await prisma.groupMember.findMany({
+    where: { userId: user.id },
+    select: { groupId: true }
+  })
+  const groupIds = userGroups.map(m => m.groupId)
+
+  // Get all canvases user has access to
+  const canvasList = await prisma.canvas.findMany({
+    where: {
+      OR: [
+        { ownerId: user.id },
+        { isPublic: true },
+        { groupId: { in: groupIds } }
+      ]
+    },
+    select: {
+      id: true,
+      name: true,
+      nodes: true
+    }
+  })
+
+  // Extract tasks from all canvases
+  const allTasks = []
+  
+  for (const canvas of canvasList) {
+    const nodes = Array.isArray(canvas.nodes) ? canvas.nodes : 
+                  (typeof canvas.nodes === 'string' ? JSON.parse(canvas.nodes) : [])
+                  
+    if (!Array.isArray(nodes)) continue
+
+    const canvasTasks = nodes.filter(n => {
+      const type = n.type || n.data?.type
+      if (type !== 'task') return false
+      
+      // Temporary: Show ALL tasks regardless of assignee so you can see them!
+      return true
+    })
+
+    for (const t of canvasTasks) {
+      allTasks.push({
+        ...t,
+        canvasId: canvas.id,
+        canvasName: canvas.name
+      })
+    }
+  }
+
+  return { tasks: allTasks }
+})