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/validateFormalSyntax.js

@@ -0,0 +1,26 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+Object.defineProperty(exports, "backgroundSize", {
+    enumerable: true,
+    get: function() {
+        return backgroundSize;
+    }
+});
+const _dataTypes = require("./dataTypes");
+const _splitAtTopLevelOnly = require("./splitAtTopLevelOnly");
+function backgroundSize(value) {
+    let keywordValues = [
+        "cover",
+        "contain"
+    ];
+    // the <length-percentage> type will probably be a css function
+    // so we have to use `splitAtTopLevelOnly`
+    return (0, _splitAtTopLevelOnly.splitAtTopLevelOnly)(value, ",").every((part)=>{
+        let sizes = (0, _splitAtTopLevelOnly.splitAtTopLevelOnly)(part, "_").filter(Boolean);
+        if (sizes.length === 1 && keywordValues.includes(sizes[0])) return true;
+        if (sizes.length !== 1 && sizes.length !== 2) return false;
+        return sizes.every((size)=>(0, _dataTypes.length)(size) || (0, _dataTypes.percentage)(size) || size === "auto");
+    });
+}