feat: enhance type definitions in generated API and data model

- Added new module imports for canvases, credits, edges, helpers, and nodes in api.d.ts
- Improved type safety in dataModel.d.ts by utilizing DataModelFromSchemaDefinition and DocumentByName
- Updated Doc and Id types to reflect schema definitions for better type checking

convex/canvases.ts

@@ -0,0 +1,139 @@
+import { query, mutation } from "./_generated/server";
+import { v } from "convex/values";
+import { requireAuth } from "./helpers";
+
+// ============================================================================
+// Queries
+// ============================================================================
+
+/**
+ * Alle Canvases des eingeloggten Users, sortiert nach letzter Bearbeitung.
+ */
+export const list = query({
+  args: {},
+  handler: async (ctx) => {
+    const user = await requireAuth(ctx);
+    return await ctx.db
+      .query("canvases")
+      .withIndex("by_owner_updated", (q) => q.eq("ownerId", user.userId))
+      .order("desc")
+      .collect();
+  },
+});
+
+/**
+ * Einzelnen Canvas laden — mit Owner-Check.
+ */
+export const get = query({
+  args: { canvasId: v.id("canvases") },
+  handler: async (ctx, { canvasId }) => {
+    const user = await requireAuth(ctx);
+    const canvas = await ctx.db.get(canvasId);
+    if (!canvas || canvas.ownerId !== user.userId) {
+      return null;
+    }
+    return canvas;
+  },
+});
+
+// ============================================================================
+// Mutations
+// ============================================================================
+
+/**
+ * Neuen Canvas erstellen.
+ */
+export const create = mutation({
+  args: {
+    name: v.string(),
+    description: v.optional(v.string()),
+  },
+  handler: async (ctx, { name, description }) => {
+    const user = await requireAuth(ctx);
+    const now = Date.now();
+    const canvasId = await ctx.db.insert("canvases", {
+      name,
+      ownerId: user.userId,
+      description,
+      updatedAt: now,
+    });
+    return canvasId;
+  },
+});
+
+/**
+ * Canvas umbenennen oder Beschreibung ändern.
+ */
+export const update = mutation({
+  args: {
+    canvasId: v.id("canvases"),
+    name: v.optional(v.string()),
+    description: v.optional(v.string()),
+  },
+  handler: async (ctx, { canvasId, name, description }) => {
+    const user = await requireAuth(ctx);
+    const canvas = await ctx.db.get(canvasId);
+    if (!canvas || canvas.ownerId !== user.userId) {
+      throw new Error("Canvas not found");
+    }
+
+    const updates: Record<string, unknown> = { updatedAt: Date.now() };
+    if (name !== undefined) updates.name = name;
+    if (description !== undefined) updates.description = description;
+
+    await ctx.db.patch(canvasId, updates);
+  },
+});
+
+/**
+ * Canvas löschen — entfernt auch alle zugehörigen Nodes und Edges.
+ */
+export const remove = mutation({
+  args: { canvasId: v.id("canvases") },
+  handler: async (ctx, { canvasId }) => {
+    const user = await requireAuth(ctx);
+    const canvas = await ctx.db.get(canvasId);
+    if (!canvas || canvas.ownerId !== user.userId) {
+      throw new Error("Canvas not found");
+    }
+
+    // Alle Nodes dieses Canvas löschen
+    const nodes = await ctx.db
+      .query("nodes")
+      .withIndex("by_canvas", (q) => q.eq("canvasId", canvasId))
+      .collect();
+    for (const node of nodes) {
+      await ctx.db.delete(node._id);
+    }
+
+    // Alle Edges dieses Canvas löschen
+    const edges = await ctx.db
+      .query("edges")
+      .withIndex("by_canvas", (q) => q.eq("canvasId", canvasId))
+      .collect();
+    for (const edge of edges) {
+      await ctx.db.delete(edge._id);
+    }
+
+    // Canvas selbst löschen
+    await ctx.db.delete(canvasId);
+  },
+});
+
+/**
+ * Canvas-Thumbnail aktualisieren.
+ */
+export const setThumbnail = mutation({
+  args: {
+    canvasId: v.id("canvases"),
+    thumbnail: v.id("_storage"),
+  },
+  handler: async (ctx, { canvasId, thumbnail }) => {
+    const user = await requireAuth(ctx);
+    const canvas = await ctx.db.get(canvasId);
+    if (!canvas || canvas.ownerId !== user.userId) {
+      throw new Error("Canvas not found");
+    }
+    await ctx.db.patch(canvasId, { thumbnail, updatedAt: Date.now() });
+  },
+});