Add side panels, task selection, graph animation, and project docs

- Foldable left panel (user profile) and right panel (task details)
- Clicking a task in the list or graph node selects it and shows details
- Both views (task list + graph) always mounted via absolute inset-0 for
  correct canvas dimensions; tabs toggle visibility with opacity
- Graph node selection animation: other nodes repel outward (charge -600),
  then selected node smoothly slides to center (500ms cubic ease-out),
  then charge restores to -120 and graph stabilizes
- Graph re-fits on tab switch and panel resize via ResizeObserver
- Fix UUID string IDs throughout (backend returns UUIDs, not integers)
- Add TaskDetailPanel, UserPanel components
- Add CLAUDE.md project documentation

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

frontend/node_modules/next/dist/esm/client/portal/index.js

@@ -0,0 +1,19 @@
+import { useEffect, useState } from "react";
+import { createPortal } from "react-dom";
+export const Portal = (param)=>{
+    let { children, type } = param;
+    const [portalNode, setPortalNode] = useState(null);
+    useEffect(()=>{
+        const element = document.createElement(type);
+        document.body.appendChild(element);
+        setPortalNode(element);
+        return ()=>{
+            document.body.removeChild(element);
+        };
+    }, [
+        type
+    ]);
+    return portalNode ? /*#__PURE__*/ createPortal(children, portalNode) : null;
+};
+
+//# sourceMappingURL=index.js.map

frontend/node_modules/next/dist/esm/client/portal/index.js.map

@@ -0,0 +1 @@
+{"version":3,"sources":["../../../src/client/portal/index.tsx"],"names":["useEffect","useState","createPortal","Portal","children","type","portalNode","setPortalNode","element","document","createElement","body","appendChild","removeChild"],"mappings":"AAAA,SAASA,SAAS,EAAEC,QAAQ,QAAQ,QAAO;AAC3C,SAASC,YAAY,QAAQ,YAAW;AAOxC,OAAO,MAAMC,SAAS;QAAC,EAAEC,QAAQ,EAAEC,IAAI,EAAe;IACpD,MAAM,CAACC,YAAYC,cAAc,GAAGN,SAA6B;IAEjED,UAAU;QACR,MAAMQ,UAAUC,SAASC,aAAa,CAACL;QACvCI,SAASE,IAAI,CAACC,WAAW,CAACJ;QAC1BD,cAAcC;QACd,OAAO;YACLC,SAASE,IAAI,CAACE,WAAW,CAACL;QAC5B;IACF,GAAG;QAACH;KAAK;IAET,OAAOC,2BAAaJ,aAAaE,UAAUE,cAAc;AAC3D,EAAC"}