feat: add OPC (One Person Company) management system with Kanban board

Phase 1 MVP implementation:
- PostgreSQL database schema for tasks, agents, executions, time tracking
- Backend API: task CRUD, agent management, automatic time tracking
- Frontend: Kanban board with drag-and-drop (Parking Lot → In Progress → Done)
- Task modal for creating/editing tasks with tags, priority, assignee
- 3 core agents seeded: PM, CTO, COO
- Agent approval workflow: CxO level requires approval, others auto-execute
- Automatic time tracking: starts on in_progress, stops on done
- RBAC integration: OPC page accessible to admin/member roles

Features:
- Drag-and-drop tasks between columns
- Assign tasks to humans or AI agents
- Priority badges (low, medium, high, urgent)
- Tags and due dates
- Task history tracking
- Time entry tracking with automatic timer
- Agent execution records with approval workflow

Next steps:
- Initialize OPC database on NAS
- Implement agent executor service
- Add WebSocket for real-time updates
- Add email notifications
- Add PDF invoice generation

dashboard/frontend/src/App.svelte

@@ -12,6 +12,7 @@
   import LiteLLM from "./routes/LiteLLM.svelte";
   import CcConnect from "./routes/CcConnect.svelte";
   import InfoEngine from "./routes/InfoEngine.svelte";
+  import OPC from "./routes/OPC.svelte";
   import Login from "./routes/Login.svelte";
   import { onMount } from "svelte";
   import { getToken, checkAuth, setToken, currentUser, setCurrentUser, getPreferences, savePreferences, tryRefreshSession, logout as logoutSession } from "./lib/api.js";
@@ -29,6 +30,7 @@
     "litellm",
     "cc-connect",
     "info-engine",
+    "opc",
   ]);
 
   let page = $state("dashboard");
@@ -207,6 +209,8 @@
           <CcConnect />
         {:else if page === "info-engine" && hasPageAccess("dashboard")}
           <InfoEngine />
+        {:else if page === "opc" && hasPageAccess("opc")}
+          <OPC />
         {:else if page !== "terminal"}
           <Dashboard />
         {/if}