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/d3-array/src/index.js

@@ -0,0 +1,57 @@
+export {default as bisect, bisectRight, bisectLeft, bisectCenter} from "./bisect.js";
+export {default as ascending} from "./ascending.js";
+export {default as bisector} from "./bisector.js";
+export {blur, blur2, blurImage} from "./blur.js";
+export {default as count} from "./count.js";
+export {default as cross} from "./cross.js";
+export {default as cumsum} from "./cumsum.js";
+export {default as descending} from "./descending.js";
+export {default as deviation} from "./deviation.js";
+export {default as extent} from "./extent.js";
+export {Adder, fsum, fcumsum} from "./fsum.js";
+export {default as group, flatGroup, flatRollup, groups, index, indexes, rollup, rollups} from "./group.js";
+export {default as groupSort} from "./groupSort.js";
+export {default as bin, default as histogram} from "./bin.js"; // Deprecated; use bin.
+export {default as thresholdFreedmanDiaconis} from "./threshold/freedmanDiaconis.js";
+export {default as thresholdScott} from "./threshold/scott.js";
+export {default as thresholdSturges} from "./threshold/sturges.js";
+export {default as max} from "./max.js";
+export {default as maxIndex} from "./maxIndex.js";
+export {default as mean} from "./mean.js";
+export {default as median, medianIndex} from "./median.js";
+export {default as merge} from "./merge.js";
+export {default as min} from "./min.js";
+export {default as minIndex} from "./minIndex.js";
+export {default as mode} from "./mode.js";
+export {default as nice} from "./nice.js";
+export {default as pairs} from "./pairs.js";
+export {default as permute} from "./permute.js";
+export {default as quantile, quantileIndex, quantileSorted} from "./quantile.js";
+export {default as quickselect} from "./quickselect.js";
+export {default as range} from "./range.js";
+export {default as rank} from "./rank.js";
+export {default as least} from "./least.js";
+export {default as leastIndex} from "./leastIndex.js";
+export {default as greatest} from "./greatest.js";
+export {default as greatestIndex} from "./greatestIndex.js";
+export {default as scan} from "./scan.js"; // Deprecated; use leastIndex.
+export {default as shuffle, shuffler} from "./shuffle.js";
+export {default as sum} from "./sum.js";
+export {default as ticks, tickIncrement, tickStep} from "./ticks.js";
+export {default as transpose} from "./transpose.js";
+export {default as variance} from "./variance.js";
+export {default as zip} from "./zip.js";
+export {default as every} from "./every.js";
+export {default as some} from "./some.js";
+export {default as filter} from "./filter.js";
+export {default as map} from "./map.js";
+export {default as reduce} from "./reduce.js";
+export {default as reverse} from "./reverse.js";
+export {default as sort} from "./sort.js";
+export {default as difference} from "./difference.js";
+export {default as disjoint} from "./disjoint.js";
+export {default as intersection} from "./intersection.js";
+export {default as subset} from "./subset.js";
+export {default as superset} from "./superset.js";
+export {default as union} from "./union.js";
+export {InternMap, InternSet} from "internmap";