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/lib/helpers/get-pkg-manager.js

@@ -0,0 +1,48 @@
+import fs from "fs";
+import path from "path";
+import { execSync } from "child_process";
+export function getPkgManager(baseDir) {
+    try {
+        for (const { lockFile, packageManager } of [
+            {
+                lockFile: "yarn.lock",
+                packageManager: "yarn"
+            },
+            {
+                lockFile: "pnpm-lock.yaml",
+                packageManager: "pnpm"
+            },
+            {
+                lockFile: "package-lock.json",
+                packageManager: "npm"
+            }
+        ]){
+            if (fs.existsSync(path.join(baseDir, lockFile))) {
+                return packageManager;
+            }
+        }
+        const userAgent = process.env.npm_config_user_agent;
+        if (userAgent) {
+            if (userAgent.startsWith("yarn")) {
+                return "yarn";
+            } else if (userAgent.startsWith("pnpm")) {
+                return "pnpm";
+            }
+        }
+        try {
+            execSync("yarn --version", {
+                stdio: "ignore"
+            });
+            return "yarn";
+        } catch  {
+            execSync("pnpm --version", {
+                stdio: "ignore"
+            });
+            return "pnpm";
+        }
+    } catch  {
+        return "npm";
+    }
+}
+
+//# sourceMappingURL=get-pkg-manager.js.map