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/route-announcer.js

@@ -0,0 +1,57 @@
+import { jsx as _jsx } from "react/jsx-runtime";
+import React from "react";
+import { useRouter } from "./router";
+const nextjsRouteAnnouncerStyles = {
+    border: 0,
+    clip: "rect(0 0 0 0)",
+    height: "1px",
+    margin: "-1px",
+    overflow: "hidden",
+    padding: 0,
+    position: "absolute",
+    top: 0,
+    width: "1px",
+    // https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe
+    whiteSpace: "nowrap",
+    wordWrap: "normal"
+};
+export const RouteAnnouncer = ()=>{
+    const { asPath } = useRouter();
+    const [routeAnnouncement, setRouteAnnouncement] = React.useState("");
+    // Only announce the path change, but not for the first load because screen
+    // reader will do that automatically.
+    const previouslyLoadedPath = React.useRef(asPath);
+    // Every time the path changes, announce the new page’s title following this
+    // priority: first the document title (from head), otherwise the first h1, or
+    // if none of these exist, then the pathname from the URL. This methodology is
+    // inspired by Marcy Sutton’s accessible client routing user testing. More
+    // information can be found here:
+    // https://www.gatsbyjs.com/blog/2019-07-11-user-testing-accessible-client-routing/
+    React.useEffect(()=>{
+        // If the path hasn't change, we do nothing.
+        if (previouslyLoadedPath.current === asPath) return;
+        previouslyLoadedPath.current = asPath;
+        if (document.title) {
+            setRouteAnnouncement(document.title);
+        } else {
+            const pageHeader = document.querySelector("h1");
+            var _pageHeader_innerText;
+            const content = (_pageHeader_innerText = pageHeader == null ? void 0 : pageHeader.innerText) != null ? _pageHeader_innerText : pageHeader == null ? void 0 : pageHeader.textContent;
+            setRouteAnnouncement(content || asPath);
+        }
+    }, // TODO: switch to pathname + query object of dynamic route requirements
+    [
+        asPath
+    ]);
+    return /*#__PURE__*/ _jsx("p", {
+        "aria-live": "assertive" // Make the announcement immediately.
+        ,
+        id: "__next-route-announcer__",
+        role: "alert",
+        style: nextjsRouteAnnouncerStyles,
+        children: routeAnnouncement
+    });
+};
+export default RouteAnnouncer;
+
+//# sourceMappingURL=route-announcer.js.map