Refactor canvas storage URL handling and integrate adjustment presets

- Introduced a new `CanvasPresetsProvider` to manage adjustment presets for nodes, enhancing state management and reducing reactivity.
- Updated storage URL resolution to utilize a mutation instead of a reactive query, improving performance and reducing unnecessary re-renders.
- Refactored adjustment nodes (color-adjust, curves, detail-adjust, light-adjust) to use the new preset context for fetching user presets.
- Improved overall canvas functionality by streamlining storage ID collection and URL resolution processes.

components/canvas/CLAUDE.md

@@ -29,6 +29,7 @@ app/(app)/canvas/[canvasId]/page.tsx
 | Datei | Zweck |
 |------|-------|
 | `canvas-helpers.ts` | Shared Utility-Layer (Optimistic IDs, Node-Merge, Compare-Resolution, Edge/Hit-Helpers, Konstante Defaults) |
+| `canvas-presets-context.tsx` | Shared Preset-Provider für Adjustment-Nodes; bündelt `presets.list` zu einer einzigen Query |
 | `canvas-node-change-helpers.ts` | Dimensions-/Resize-Transformationen für `asset` und `ai-image` Nodes |
 | `canvas-generation-failures.ts` | Hook für AI-Generation-Error-Tracking mit Schwellenwert-Toast |
 | `canvas-scissors.ts` | Hook für Scherenmodus (K/Esc Toggle, Click-Cut, Stroke-Cut) |
@@ -53,7 +54,9 @@ Convex und React Flow verwenden unterschiedliche Datenmodelle. Das Mapping liegt
 
 **Status-Injection:** `convexNodeToRF` schreibt `_status`, `_statusMessage` und `retryCount` in `data`, damit Node-Komponenten darauf zugreifen können ohne das Node-Dokument direkt zu kennen.
 
-**URL-Caching:** Images mit `storageId` werden über einen batch-Storage-URL-Query aufgelöst (`urlByStorage`-Map). Die vorherige URL wird in `previousDataByNodeId` gecacht, um Flackern beim Reload zu vermeiden.
+**URL-Caching:** Images mit `storageId` werden im Canvas nicht mehr über eine reaktive Query aufgelöst. `canvas.tsx` sammelt die aktuellen `storageId`s aus `nodes.list` und ruft `storage.batchGetUrlsForCanvas` gezielt per Mutation auf, nur wenn sich das Set ändert. Die vorherige URL wird in `previousDataByNodeId` gecacht, um Flackern beim Reload zu vermeiden.
+
+**Load-Shedding-Hot-Path:** Der Canvas-Hot-Path soll so wenig Convex-Abhängigkeiten wie möglich haben. Direkt reaktiv bleiben nur die Kernmodelle (`nodes.list`, `edges.list`, `canvases.get`). Nebenpfade wie Storage-URL-Auflösung, Adjustment-Presets und Toolbar-Credits sind bewusst entkoppelt oder zusammengefasst.
 
 ---
 
@@ -146,7 +149,7 @@ Im **Light Mode** wird der eigentliche Edge-`stroke` ebenfalls aus dieser Akzent
 | `asset-browser-panel.tsx` | Freepik/Stock-Asset-Browser |
 | `video-browser-panel.tsx` | Video-Asset-Browser |
 | `canvas-user-menu.tsx` | User-Avatar und Menü |
-| `credit-display.tsx` | Credit-Balance Anzeige in der Toolbar |
+| `credit-display.tsx` | Credit-Balance Anzeige in der Toolbar (nur `credits.getBalance`, kein Tier-Badge) |
 | `export-button.tsx` | Export-Button mit Format-Auswahl |
 | `connection-banner.tsx` | Offline-Banner bei Convex-Verbindungsverlust |
 | `custom-connection-line.tsx` | Angepasste temporäre Verbindungslinie |
@@ -168,6 +171,7 @@ Im **Light Mode** wird der eigentliche Edge-`stroke` ebenfalls aus dieser Akzent
 ## Wichtige Gotchas
 
 - **`data.url` vs `storageId`:** Node-Komponenten erhalten `data.url` (aufgelöste HTTP-URL), nicht `storageId` direkt. Die URL wird von `convexNodeDocWithMergedStorageUrl` injiziert. Bei neuen Node-Typen mit Bild immer diesen Flow prüfen.
+- **Adjustment-Presets:** `curves`, `color-adjust`, `light-adjust` und `detail-adjust` dürfen keine eigene `presets.list`-Query feuern. Immer `CanvasPresetsProvider` + `useCanvasAdjustmentPresets(...)` verwenden.
 - **Min-Zoom:** `CANVAS_MIN_ZOOM = 0.5 / 3` — dreimal weiter raus als React-Flow-Default.
 - **Parent-Nodes:** `parentId` zeigt auf einen Group- oder Frame-Node. React Flow erwartet, dass Parent-Nodes vor Child-Nodes in der `nodes`-Array stehen.
 - **Bridge-Edges:** Beim Löschen eines mittleren Nodes werden Kanten automatisch neu verbunden (`computeBridgeCreatesForDeletedNodes` aus `lib/canvas-utils.ts`).

components/canvas/canvas-presets-context.tsx

@@ -0,0 +1,56 @@
+"use client";
+
+import { createContext, useContext, useMemo, type ReactNode } from "react";
+
+import { api } from "@/convex/_generated/api";
+import type { Doc } from "@/convex/_generated/dataModel";
+import { useAuthQuery } from "@/hooks/use-auth-query";
+
+type AdjustmentPresetDoc = Doc<"adjustmentPresets">;
+type PresetsByNodeType = Map<AdjustmentPresetDoc["nodeType"], AdjustmentPresetDoc[]>;
+
+const CanvasPresetsContext = createContext<PresetsByNodeType | null>(null);
+
+type CanvasPresetsProviderProps = {
+  enabled?: boolean;
+  children: ReactNode;
+};
+
+export function CanvasPresetsProvider({
+  enabled = true,
+  children,
+}: CanvasPresetsProviderProps) {
+  const rawPresets = useAuthQuery(api.presets.list, enabled ? {} : "skip");
+
+  const presetsByNodeType = useMemo<PresetsByNodeType>(() => {
+    const next = new Map<AdjustmentPresetDoc["nodeType"], AdjustmentPresetDoc[]>();
+
+    for (const preset of (rawPresets ?? []) as AdjustmentPresetDoc[]) {
+      const existing = next.get(preset.nodeType);
+      if (existing) {
+        existing.push(preset);
+      } else {
+        next.set(preset.nodeType, [preset]);
+      }
+    }
+
+    return next;
+  }, [rawPresets]);
+
+  return (
+    <CanvasPresetsContext.Provider value={presetsByNodeType}>
+      {children}
+    </CanvasPresetsContext.Provider>
+  );
+}
+
+export function useCanvasAdjustmentPresets(
+  nodeType: AdjustmentPresetDoc["nodeType"],
+): AdjustmentPresetDoc[] {
+  const context = useContext(CanvasPresetsContext);
+  if (context === null) {
+    return [];
+  }
+
+  return context.get(nodeType) ?? [];
+}

components/canvas/canvas.tsx

@@ -72,6 +72,7 @@ import { api } from "@/convex/_generated/api";
 import type { Doc, Id } from "@/convex/_generated/dataModel";
 import { authClient } from "@/lib/auth-client";
 import {
+  isAdjustmentPresetNodeType,
   isCanvasNodeType,
   type CanvasNodeType,
 } from "@/lib/canvas-node-types";
@@ -95,6 +96,7 @@ import {
   type ConnectionDropMenuState,
 } from "@/components/canvas/canvas-connection-drop-menu";
 import { CanvasPlacementProvider } from "@/components/canvas/canvas-placement-context";
+import { CanvasPresetsProvider } from "@/components/canvas/canvas-presets-context";
 import {
   AssetBrowserTargetContext,
   type AssetBrowserTargetApi,
@@ -203,11 +205,6 @@ function summarizeResizePayload(payload: unknown): Record<string, unknown> {
   };
 }
 
-function hasStorageId(node: Doc<"nodes">): boolean {
-  const data = node.data as Record<string, unknown> | undefined;
-  return typeof data?.storageId === "string" && data.storageId.length > 0;
-}
-
 function validateCanvasConnection(
   connection: Connection,
   nodes: RFNode[],
@@ -261,10 +258,6 @@ function CanvasInner({ canvasId }: CanvasInnerProps) {
   const { isLoading: isAuthLoading, isAuthenticated } = useConvexAuth();
   const shouldSkipCanvasQueries =
     isSessionPending || isAuthLoading || !isAuthenticated;
-  const convexAuthUserProbe = useQuery(
-    api.auth.safeGetAuthUser,
-    shouldSkipCanvasQueries ? "skip" : {},
-  );
 
   useEffect(() => {
     if (process.env.NODE_ENV === "production") return;
@@ -282,8 +275,6 @@ function CanvasInner({ canvasId }: CanvasInnerProps) {
       convex: {
         isAuthenticated,
         shouldSkipCanvasQueries,
-        probeUserId: convexAuthUserProbe?.userId ?? null,
-        probeRecordId: convexAuthUserProbe?._id ?? null,
       },
       session: {
         hasUser: Boolean(session?.user),
@@ -292,8 +283,6 @@ function CanvasInner({ canvasId }: CanvasInnerProps) {
     });
   }, [
     canvasId,
-    convexAuthUserProbe?._id,
-    convexAuthUserProbe?.userId,
     isAuthLoading,
     isAuthenticated,
     isSessionPending,
@@ -310,20 +299,71 @@ function CanvasInner({ canvasId }: CanvasInnerProps) {
     api.edges.list,
     shouldSkipCanvasQueries ? "skip" : { canvasId },
   );
-  const shouldSkipStorageUrlQuery = useMemo(() => {
+  const storageIdsForCanvas = useMemo(() => {
-    if (shouldSkipCanvasQueries) return true;
+    if (!convexNodes) {
-    if (convexNodes === undefined) return true;
+      return [] as Id<"_storage">[];
-    return !convexNodes.some(hasStorageId);
+    }
-  }, [convexNodes, shouldSkipCanvasQueries]);
+
-  const storageUrlsById = useQuery(
+    return [...new Set(
-    api.storage.batchGetUrlsForCanvas,
+      convexNodes.flatMap((node) => {
-    shouldSkipStorageUrlQuery ? "skip" : { canvasId },
+        const data = node.data as Record<string, unknown> | undefined;
-  );
+        return typeof data?.storageId === "string" && data.storageId.length > 0
+          ? [data.storageId as Id<"_storage">]
+          : [];
+      }),
+    )].sort();
+  }, [convexNodes]);
+  const storageIdsForCanvasKey = storageIdsForCanvas.join(",");
+  const stableStorageIdsForCanvasRef = useRef(storageIdsForCanvas);
+  if (stableStorageIdsForCanvasRef.current.join(",") !== storageIdsForCanvasKey) {
+    stableStorageIdsForCanvasRef.current = storageIdsForCanvas;
+  }
+  const resolveStorageUrlsForCanvas = useMutation(api.storage.batchGetUrlsForCanvas);
+  const [storageUrlsById, setStorageUrlsById] = useState<Record<string, string | undefined>>();
   const canvas = useQuery(
     api.canvases.get,
     shouldSkipCanvasQueries ? "skip" : { canvasId },
   );
 
+  useEffect(() => {
+    const requestedStorageIds = stableStorageIdsForCanvasRef.current;
+
+    if (shouldSkipCanvasQueries || requestedStorageIds.length === 0) {
+      setStorageUrlsById(undefined);
+      return;
+    }
+
+    let cancelled = false;
+
+    void resolveStorageUrlsForCanvas({
+      canvasId,
+      storageIds: requestedStorageIds,
+    })
+      .then((result) => {
+        if (!cancelled) {
+          setStorageUrlsById(result);
+        }
+      })
+      .catch((error: unknown) => {
+        if (!cancelled) {
+          console.warn("[Canvas] failed to resolve storage URLs", {
+            canvasId,
+            storageIdCount: requestedStorageIds.length,
+            message: error instanceof Error ? error.message : String(error),
+          });
+        }
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [
+    canvasId,
+    resolveStorageUrlsForCanvas,
+    shouldSkipCanvasQueries,
+    storageIdsForCanvasKey,
+  ]);
+
   // ─── Convex Mutations (exakte Signaturen aus nodes.ts / edges.ts) ──
   const moveNode = useMutation(api.nodes.move);
   const resizeNode = useMutation(api.nodes.resize);
@@ -571,6 +611,12 @@ function CanvasInner({ canvasId }: CanvasInnerProps) {
 
   const [nodes, setNodes] = useState<RFNode[]>([]);
   const [edges, setEdges] = useState<RFEdge[]>([]);
+  const hasPresetAwareNodes = useMemo(
+    () =>
+      nodes.some((node) => isAdjustmentPresetNodeType(node.type ?? "")) ||
+      (convexNodes ?? []).some((node) => isAdjustmentPresetNodeType(node.type)),
+    [convexNodes, nodes],
+  );
   const edgesRef = useRef(edges);
   edgesRef.current = edges;
   const [pendingSyncCount, setPendingSyncCount] = useState(0);
@@ -2970,6 +3016,7 @@ function CanvasInner({ canvasId }: CanvasInnerProps) {
 
   return (
     <CanvasSyncProvider value={canvasSyncContextValue}>
+      <CanvasPresetsProvider enabled={hasPresetAwareNodes}>
         <CanvasPlacementProvider
           canvasId={canvasId}
           createNode={runCreateNodeOnlineOnly}
@@ -3081,6 +3128,7 @@ function CanvasInner({ canvasId }: CanvasInnerProps) {
       </div>
           </AssetBrowserTargetContext.Provider>
         </CanvasPlacementProvider>
+      </CanvasPresetsProvider>
     </CanvasSyncProvider>
   );
 }

components/canvas/credit-display.tsx

@@ -7,22 +7,6 @@ import { api } from "@/convex/_generated/api";
 import { Coins } from "lucide-react";
 import { toast } from "@/lib/toast";
 
-const TIER_LABELS: Record<string, string> = {
-  free: "Free",
-  starter: "Starter",
-  pro: "Pro",
-  max: "Max",
-  business: "Business",
-};
-
-const TIER_COLORS: Record<string, string> = {
-  free: "text-muted-foreground",
-  starter: "text-blue-500",
-  pro: "text-purple-500",
-  max: "text-amber-500",
-  business: "text-amber-500",
-};
-
 const showTestCreditGrant =
   typeof process.env.NEXT_PUBLIC_ALLOW_TEST_CREDIT_GRANT === "string" &&
   process.env.NEXT_PUBLIC_ALLOW_TEST_CREDIT_GRANT === "true";
@@ -30,10 +14,9 @@ const showTestCreditGrant =
 export function CreditDisplay() {
   const t = useTranslations('toasts');
   const balance = useAuthQuery(api.credits.getBalance);
-  const subscription = useAuthQuery(api.credits.getSubscription);
   const grantTestCredits = useMutation(api.credits.grantTestCredits);
 
-  if (balance === undefined || subscription === undefined) {
+  if (balance === undefined) {
     return (
       <div className="flex items-center gap-2 rounded-lg bg-muted/50 px-3 py-1.5 animate-pulse">
         <Coins className="h-4 w-4 text-muted-foreground" />
@@ -43,9 +26,6 @@ export function CreditDisplay() {
   }
 
   const available = balance.balance - balance.reserved;
-  const tier = subscription.tier;
-  const tierLabel = TIER_LABELS[tier] ?? tier;
-  const tierColor = TIER_COLORS[tier] ?? "text-muted-foreground";
 
   const isLow = available < 10;
   const isEmpty = available <= 0;
@@ -82,8 +62,6 @@ export function CreditDisplay() {
             ({balance.reserved} reserved)
           </span>
         )}
-        <span className="text-xs text-muted-foreground/70">·</span>
-        <span className={`text-xs font-medium ${tierColor}`}>{tierLabel}</span>
       </div>
       {showTestCreditGrant && (
         <button

components/canvas/nodes/color-adjust-node.tsx

@@ -8,7 +8,7 @@ import { Palette } from "lucide-react";
 
 import { api } from "@/convex/_generated/api";
 import type { Id } from "@/convex/_generated/dataModel";
-import { useAuthQuery } from "@/hooks/use-auth-query";
+import { useCanvasAdjustmentPresets } from "@/components/canvas/canvas-presets-context";
 import { useDebouncedCallback } from "@/hooks/use-debounced-callback";
 import { useCanvasSync } from "@/components/canvas/canvas-sync-context";
 import BaseNodeWrapper from "@/components/canvas/nodes/base-node-wrapper";
@@ -47,7 +47,7 @@ export default function ColorAdjustNode({ id, data, selected, width }: NodeProps
   const tToasts = useTranslations("toasts");
   const { queueNodeDataUpdate } = useCanvasSync();
   const savePreset = useMutation(api.presets.save);
-  const userPresets = (useAuthQuery(api.presets.list, { nodeType: "color-adjust" }) ?? []) as PresetDoc[];
+  const userPresets = useCanvasAdjustmentPresets("color-adjust") as PresetDoc[];
 
   const [localData, setLocalData] = useState<ColorAdjustData>(() =>
     normalizeColorAdjustData({ ...cloneAdjustmentData(DEFAULT_COLOR_ADJUST_DATA), ...data }),

components/canvas/nodes/curves-node.tsx

@@ -8,7 +8,7 @@ import { TrendingUp } from "lucide-react";
 
 import { api } from "@/convex/_generated/api";
 import type { Id } from "@/convex/_generated/dataModel";
-import { useAuthQuery } from "@/hooks/use-auth-query";
+import { useCanvasAdjustmentPresets } from "@/components/canvas/canvas-presets-context";
 import { useDebouncedCallback } from "@/hooks/use-debounced-callback";
 import { useCanvasSync } from "@/components/canvas/canvas-sync-context";
 import BaseNodeWrapper from "@/components/canvas/nodes/base-node-wrapper";
@@ -47,7 +47,7 @@ export default function CurvesNode({ id, data, selected, width }: NodeProps<Curv
   const tToasts = useTranslations("toasts");
   const { queueNodeDataUpdate } = useCanvasSync();
   const savePreset = useMutation(api.presets.save);
-  const userPresets = (useAuthQuery(api.presets.list, { nodeType: "curves" }) ?? []) as PresetDoc[];
+  const userPresets = useCanvasAdjustmentPresets("curves") as PresetDoc[];
 
   const [localData, setLocalData] = useState<CurvesData>(() =>
     normalizeCurvesData({ ...cloneAdjustmentData(DEFAULT_CURVES_DATA), ...data }),

components/canvas/nodes/detail-adjust-node.tsx

@@ -8,7 +8,7 @@ import { Focus } from "lucide-react";
 
 import { api } from "@/convex/_generated/api";
 import type { Id } from "@/convex/_generated/dataModel";
-import { useAuthQuery } from "@/hooks/use-auth-query";
+import { useCanvasAdjustmentPresets } from "@/components/canvas/canvas-presets-context";
 import { useDebouncedCallback } from "@/hooks/use-debounced-callback";
 import { useCanvasSync } from "@/components/canvas/canvas-sync-context";
 import BaseNodeWrapper from "@/components/canvas/nodes/base-node-wrapper";
@@ -47,7 +47,7 @@ export default function DetailAdjustNode({ id, data, selected, width }: NodeProp
   const tToasts = useTranslations("toasts");
   const { queueNodeDataUpdate } = useCanvasSync();
   const savePreset = useMutation(api.presets.save);
-  const userPresets = (useAuthQuery(api.presets.list, { nodeType: "detail-adjust" }) ?? []) as PresetDoc[];
+  const userPresets = useCanvasAdjustmentPresets("detail-adjust") as PresetDoc[];
 
   const [localData, setLocalData] = useState<DetailAdjustData>(() =>
     normalizeDetailAdjustData({ ...cloneAdjustmentData(DEFAULT_DETAIL_ADJUST_DATA), ...data }),

components/canvas/nodes/light-adjust-node.tsx

@@ -8,7 +8,7 @@ import { Sun } from "lucide-react";
 
 import { api } from "@/convex/_generated/api";
 import type { Id } from "@/convex/_generated/dataModel";
-import { useAuthQuery } from "@/hooks/use-auth-query";
+import { useCanvasAdjustmentPresets } from "@/components/canvas/canvas-presets-context";
 import { useDebouncedCallback } from "@/hooks/use-debounced-callback";
 import { useCanvasSync } from "@/components/canvas/canvas-sync-context";
 import BaseNodeWrapper from "@/components/canvas/nodes/base-node-wrapper";
@@ -47,7 +47,7 @@ export default function LightAdjustNode({ id, data, selected, width }: NodeProps
   const tToasts = useTranslations("toasts");
   const { queueNodeDataUpdate } = useCanvasSync();
   const savePreset = useMutation(api.presets.save);
-  const userPresets = (useAuthQuery(api.presets.list, { nodeType: "light-adjust" }) ?? []) as PresetDoc[];
+  const userPresets = useCanvasAdjustmentPresets("light-adjust") as PresetDoc[];
 
   const [localData, setLocalData] = useState<LightAdjustData>(() =>
     normalizeLightAdjustData({ ...cloneAdjustmentData(DEFAULT_LIGHT_ADJUST_DATA), ...data }),

convex/CLAUDE.md

@@ -20,7 +20,7 @@ Convex ist das vollständige Backend von LemonSpace: Datenbank, Realtime-Subscri
 | `polar.ts` | Polar.sh Webhook-Handler (Subscriptions) |
 | `pexels.ts` | Pexels Stock-Bilder API |
 | `freepik.ts` | Freepik Asset-Browser API |
-| `storage.ts` | Convex File Storage Helpers |
+| `storage.ts` | Convex File Storage Helpers + gebündelte Canvas-URL-Auflösung |
 | `export.ts` | Canvas-Export-Logik |
 | `http.ts` | HTTP-Endpunkte (Webhooks) |
 
@@ -148,6 +148,16 @@ Wirft bei unauthentifiziertem Zugriff. Wird von allen Queries und Mutations genu
 
 ---
 
+## Storage (`storage.ts`)
+
+- `generateUploadUrl` bleibt eine normale Mutation für Upload-Start im Client.
+- `batchGetUrlsForCanvas` ist absichtlich **keine reaktive Query** mehr, sondern eine Mutation. Der Canvas ruft sie gezielt an, wenn sich das aktuelle Set von `storageId`s geändert hat.
+- Eingabe: `canvasId` + client-seitig ermittelte `storageIds`.
+- Server-seitig werden die angefragten IDs gegen die aktuellen Nodes des Canvas verifiziert, bevor `ctx.storage.getUrl(...)` aufgerufen wird.
+- Ziel der Änderung: weniger Query-Fanout und weniger Canvas-weite Requery-Last bei jedem Node-/Edge-Update.
+
+---
+
 ## Konventionen
 
 - `internalMutation` / `internalAction` — Nur von anderen Convex-Funktionen aufrufbar, nicht direkt vom Client.

convex/storage.ts

@@ -1,4 +1,4 @@
-import { mutation, query, type QueryCtx } from "./_generated/server";
+import { mutation, type MutationCtx, type QueryCtx } from "./_generated/server";
 import { v } from "convex/values";
 import { requireAuth } from "./helpers";
 import type { Id } from "./_generated/dataModel";
@@ -31,7 +31,7 @@ type StorageUrlResult =
     };
 
 async function assertCanvasOwner(
-  ctx: QueryCtx,
+  ctx: QueryCtx | MutationCtx,
   canvasId: Id<"canvases">,
   userId: string,
 ): Promise<void> {
@@ -41,29 +41,6 @@ async function assertCanvasOwner(
   }
 }
 
-async function listNodesForCanvas(ctx: QueryCtx, canvasId: Id<"canvases">) {
-  return await ctx.db
-    .query("nodes")
-    .withIndex("by_canvas", (q) => q.eq("canvasId", canvasId))
-    .collect();
-}
-
-function collectStorageIds(
-  nodes: Array<{ data: unknown }>,
-): Array<Id<"_storage">> {
-  const ids = new Set<Id<"_storage">>();
-
-  for (const node of nodes) {
-    const data = node.data as Record<string, unknown> | undefined;
-    const storageId = data?.storageId;
-    if (typeof storageId === "string" && storageId.length > 0) {
-      ids.add(storageId as Id<"_storage">);
-    }
-  }
-
-  return [...ids];
-}
-
 async function resolveStorageUrls(
   ctx: QueryCtx,
   storageIds: Array<Id<"_storage">>,
@@ -141,33 +118,67 @@ export const generateUploadUrl = mutation({
  * Signierte URLs für alle Storage-Assets eines Canvas (gebündelt).
  * `nodes.list` liefert keine URLs mehr, damit Node-Liste schnell bleibt.
  */
-export const batchGetUrlsForCanvas = query({
+export const batchGetUrlsForCanvas = mutation({
-  args: { canvasId: v.id("canvases") },
+  args: {
-  handler: async (ctx, { canvasId }) => {
+    canvasId: v.id("canvases"),
+    storageIds: v.array(v.id("_storage")),
+  },
+  handler: async (ctx, { canvasId, storageIds }) => {
     const startedAt = Date.now();
     const user = await requireAuth(ctx);
     await assertCanvasOwner(ctx, canvasId, user.userId);
 
+    const uniqueSortedStorageIds = [...new Set(storageIds)].sort();
+    if (uniqueSortedStorageIds.length === 0) {
+      return {};
+    }
+
     const nodes = await listNodesForCanvas(ctx, canvasId);
-    const nodeCount = nodes.length;
+    const allowedStorageIds = new Set(collectStorageIds(nodes));
-    const storageIds = collectStorageIds(nodes);
+    const verifiedStorageIds = uniqueSortedStorageIds.filter((storageId) =>
-    const collectTimeMs = Date.now() - startedAt;
+      allowedStorageIds.has(storageId),
-    if (collectTimeMs >= PERFORMANCE_LOG_THRESHOLD_MS) {
+    );
-      console.warn("[storage.batchGetUrlsForCanvas] slow node scan", {
+    const rejectedStorageIds = uniqueSortedStorageIds.length - verifiedStorageIds.length;
+    if (rejectedStorageIds > 0) {
+      console.warn("[storage.batchGetUrlsForCanvas] rejected unowned storage ids", {
         canvasId,
-        nodeCount,
+        requestedCount: uniqueSortedStorageIds.length,
-        storageIdCount: storageIds.length,
+        rejectedStorageIds,
-        durationMs: collectTimeMs,
       });
     }
 
-    const result = await resolveStorageUrls(ctx, storageIds);
+    const result = await resolveStorageUrls(ctx, verifiedStorageIds);
     logSlowQuery("batchGetUrlsForCanvas::total", startedAt, {
       canvasId,
-      nodeCount,
+      storageIdCount: verifiedStorageIds.length,
-      storageIdCount: storageIds.length,
+      rejectedStorageIds,
       resolvedCount: Object.keys(result).length,
     });
     return result;
   },
 });
+async function listNodesForCanvas(
+  ctx: QueryCtx | MutationCtx,
+  canvasId: Id<"canvases">,
+) {
+  return await ctx.db
+    .query("nodes")
+    .withIndex("by_canvas", (q) => q.eq("canvasId", canvasId))
+    .collect();
+}
+
+function collectStorageIds(
+  nodes: Array<{ data: unknown }>,
+): Array<Id<"_storage">> {
+  const ids = new Set<Id<"_storage">>();
+
+  for (const node of nodes) {
+    const data = node.data as Record<string, unknown> | undefined;
+    const storageId = data?.storageId;
+    if (typeof storageId === "string" && storageId.length > 0) {
+      ids.add(storageId as Id<"_storage">);
+    }
+  }
+
+  return [...ids];
+}

docs/plans/2026-04-03-canvas-convex-load-shedding-design.md

@@ -0,0 +1,33 @@
+# Canvas Convex Load Shedding Design
+
+## Goal
+
+Reduce Convex query fanout and hot-path load on the canvas page so node placement and canvas interaction no longer collapse when the local Convex runtime is under pressure.
+
+## Findings
+
+- `nodes:create` itself is fast when the runtime is healthy.
+- The canvas page issues multiple concurrent reactive queries: `nodes:list`, `edges:list`, `canvases:get`, `credits:getBalance`, `credits:getSubscription`, `storage:batchGetUrlsForCanvas`, and several `presets:list` variants.
+- During failure windows, many unrelated queries time out together, which points to runtime saturation rather than a single broken query.
+
+## Chosen Approach
+
+Use a broad load-shedding refactor on the canvas hot path:
+
+1. Remove debug-only and non-essential queries from the core canvas render path.
+2. Eliminate the server-side batch storage URL query by deriving stable fallback URLs client-side from `storageId`.
+3. Collapse multiple adjustment preset queries into one shared presets query and distribute the data through React context.
+4. Drop the subscription-tier query from the canvas toolbar and keep the toolbar credit widget on the cheaper balance path only.
+
+## Expected Impact
+
+- Fewer unique Convex subscriptions on the canvas page.
+- Less full-canvas invalidation work after every node or edge mutation.
+- Lower pressure on `auth:safeGetAuthUser` because fewer canvas-adjacent queries depend on it.
+- Better resilience when Convex dev runtime is temporarily slow.
+
+## Risks
+
+- Client-side fallback storage URLs must continue to work with the current Convex deployment setup.
+- The toolbar will no longer show the subscription tier on the canvas page.
+- Shared preset context must preserve current node behavior and save/remove flows.

docs/plans/2026-04-03-canvas-convex-load-shedding.md

@@ -0,0 +1,63 @@
+# Canvas Convex Load Shedding Implementation Plan
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** Reduce Convex canvas-page load by removing non-essential hot-path queries and collapsing redundant read models.
+
+**Architecture:** The canvas keeps `nodes:list`, `edges:list`, and `canvases:get` as the primary real-time model while shedding secondary reads. Storage URLs move to a client-derived fallback path, presets move to a shared context backed by one query, and the toolbar stops depending on the subscription query.
+
+**Tech Stack:** Next.js 16, React 19, Convex, React Flow, TypeScript
+
+---
+
+### Task 1: Remove unnecessary canvas hot-path queries
+
+**Files:**
+- Modify: `components/canvas/canvas.tsx`
+- Modify: `components/canvas/credit-display.tsx`
+- Modify: `components/canvas/canvas-toolbar.tsx`
+
+**Step 1:** Remove the debug-only `api.auth.safeGetAuthUser` query from `components/canvas/canvas.tsx`.
+
+**Step 2:** Remove `api.credits.getSubscription` dependency from `components/canvas/credit-display.tsx` and keep the widget on the balance query only.
+
+**Step 3:** Update toolbar rendering only as needed to match the leaner credit widget.
+
+### Task 2: Remove server-side storage URL batching from the canvas hot path
+
+**Files:**
+- Modify: `components/canvas/canvas.tsx`
+- Modify: `lib/canvas-utils.ts`
+
+**Step 1:** Stop subscribing to `api.storage.batchGetUrlsForCanvas` from the canvas page.
+
+**Step 2:** Extend `convexNodeDocWithMergedStorageUrl` to synthesize a stable fallback URL from `storageId` when no cached URL exists.
+
+**Step 3:** Preserve previous merged URLs when available so existing anti-flicker behavior remains intact.
+
+### Task 3: Collapse preset reads into one shared query
+
+**Files:**
+- Create: `components/canvas/canvas-presets-context.tsx`
+- Modify: `components/canvas/canvas.tsx`
+- Modify: `components/canvas/nodes/curves-node.tsx`
+- Modify: `components/canvas/nodes/color-adjust-node.tsx`
+- Modify: `components/canvas/nodes/light-adjust-node.tsx`
+- Modify: `components/canvas/nodes/detail-adjust-node.tsx`
+
+**Step 1:** Add a shared presets provider that executes one `api.presets.list` query.
+
+**Step 2:** Filter presets client-side by node type via a small hook/helper.
+
+**Step 3:** Replace per-node `useAuthQuery(api.presets.list, { nodeType })` calls with the shared presets hook.
+
+### Task 4: Verify the refactor
+
+**Files:**
+- Verify only
+
+**Step 1:** Run lint on touched files.
+
+**Step 2:** Run targeted type-check or full type-check if feasible.
+
+**Step 3:** Reproduce canvas placement flow and confirm Convex hot-path query count is reduced.

lib/CLAUDE.md

@@ -37,12 +37,14 @@ Alle Adapter-Funktionen zwischen Convex-Datenmodell und React Flow. Details in `
 
 **Kritische Exports:**
 - `convexNodeToRF`, `convexEdgeToRF`, `convexEdgeToRFWithSourceGlow`
-- `convexNodeDocWithMergedStorageUrl` — URL-Injection für Storage-Bilder
+- `convexNodeDocWithMergedStorageUrl` — URL-Injection für Storage-Bilder aus serverseitig aufgelöster URL-Map oder gecachtem Vorgängerzustand
 - `NODE_DEFAULTS` — Default-Größen und Daten per Node-Typ
 - `NODE_HANDLE_MAP` — Handle-IDs pro Node-Typ
 - `computeBridgeCreatesForDeletedNodes` — Kanten-Reconnect nach Node-Löschung
 - `computeMediaNodeSize` — Dynamische Node-Größe basierend auf Bild-Dimensionen
 
+**Wichtig:** `canvas-utils.ts` erzeugt keine Storage-Fallback-URLs mehr selbst. Die URL-Auflösung kommt aus dem Canvas-Layer (`storage.batchGetUrlsForCanvas`) und wird hier nur noch gemerged/cached.
+
 ---
 
 ## `canvas-node-catalog.ts` — Node-Taxonomie

lib/canvas-utils.ts

@@ -21,7 +21,7 @@ import {
  */
 /**
  * Reichert Node-Dokumente mit `data.url` an (aus gebündelter Storage-URL-Map).
- * Behält eine zuvor gemappte URL bei, solange die Batch-Query noch lädt.
+ * Behält eine zuvor gemappte URL bei, solange die URL-Auflösung noch lädt.
  */
 export function convexNodeDocWithMergedStorageUrl(
   node: Doc<"nodes">,