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/tailwindcss/lib/util/splitAtTopLevelOnly.js

@@ -0,0 +1,47 @@
+/**
+ * This splits a string on a top-level character.
+ *
+ * Regex doesn't support recursion (at least not the JS-flavored version).
+ * So we have to use a tiny state machine to keep track of paren placement.
+ *
+ * Expected behavior using commas:
+ * var(--a, 0 0 1px rgb(0, 0, 0)), 0 0 1px rgb(0, 0, 0)
+ *       ─┬─             ┬  ┬    ┬
+ *        x              x  x    ╰──────── Split because top-level
+ *        ╰──────────────┴──┴───────────── Ignored b/c inside >= 1 levels of parens
+ *
+ * @param {string} input
+ * @param {string} separator
+ */ "use strict";
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+Object.defineProperty(exports, "splitAtTopLevelOnly", {
+    enumerable: true,
+    get: function() {
+        return splitAtTopLevelOnly;
+    }
+});
+function splitAtTopLevelOnly(input, separator) {
+    let stack = [];
+    let parts = [];
+    let lastPos = 0;
+    let isEscaped = false;
+    for(let idx = 0; idx < input.length; idx++){
+        let char = input[idx];
+        if (stack.length === 0 && char === separator[0] && !isEscaped) {
+            if (separator.length === 1 || input.slice(idx, idx + separator.length) === separator) {
+                parts.push(input.slice(lastPos, idx));
+                lastPos = idx + separator.length;
+            }
+        }
+        isEscaped = isEscaped ? false : char === "\\";
+        if (char === "(" || char === "[" || char === "{") {
+            stack.push(char);
+        } else if (char === ")" && stack[stack.length - 1] === "(" || char === "]" && stack[stack.length - 1] === "[" || char === "}" && stack[stack.length - 1] === "{") {
+            stack.pop();
+        }
+    }
+    parts.push(input.slice(lastPos));
+    return parts;
+}