feat: Phase 1 — extract the client (web SPA + desktop) to dtoro/oikos-web

Problem: the hexagonal refactor churns the backend tree for nine more
phases; the UI delivery stack (web/ SPA, cmd/desktop Wails wrapper,
compose/web image) must move to its own repo first so doc/layout
rewrites land once on a backend-only tree.

Change:
- New repo git.hubris.network/dtoro/oikos-web (v0.33.0): web/, desktop/
  (updateURL repointed to oikos-web releases), compose/, own CI (web +
  desktop jobs), own deploy script (CI-green gate, TOCTOU guard,
  version-tagged images, prune-to-3), own webhook receiver on :9798 +
  launchd unit, own compose project publishing the same 8091:80.
- Cutover executed on mac-mini in order: oikos stack's web service
  stopped+removed, oikos-web project brought up on 8091; outer Caddy
  untouched (targets the published port) — serving + Authentik flow +
  /wails 404 quirk verified post-cutover.
- Stripped from oikos: web/, cmd/desktop/, compose/web/, desktop CI
  workflow, ci.yml web job, Makefile ui/desktop/desktop-package/install
  targets, the compose web service, oikos-web from deploy.sh's fallback
  prune list; wails + go-keyring dropped from go.mod, vendor synced.
- README / CONTRIBUTING / AGENTS.md / .agents dev+operations docs now
  point at the new repo; mbse + mascot design docs carry a path note.

Risk: production SPA serving depends on the new pipeline now; rollback
is versioned-image re-up of the old web service from a pre-split
checkout (port 8091). Desktop builds installed before the split still
check dtoro/oikos releases — one manual reinstall, noted in the
oikos-web release notes.

Verification: go vet, make test (race), make generate-check, golangci
(no new findings; baseline down 400→365); post-cutover curls —
localhost:8091 200, /wails/runtime.js 404, outer Caddy 302 Authentik.

web/node_modules/@sigma/node-image/dist/declarations/src/factory.d.ts

@@ -0,0 +1,19 @@
+import { Attributes } from "graphology-types";
+import { NodeHoverDrawingFunction, NodeLabelDrawingFunction, NodeProgramType } from "sigma/rendering";
+import { TextureManagerOptions } from "./texture.js";
+interface CreateNodeImageProgramOptions<N extends Attributes = Attributes, E extends Attributes = Attributes, G extends Attributes = Attributes> extends TextureManagerOptions {
+    drawingMode: "background" | "color";
+    keepWithinCircle: boolean;
+    drawLabel: NodeLabelDrawingFunction<N, E, G> | undefined;
+    drawHover: NodeHoverDrawingFunction<N, E, G> | undefined;
+    padding: number;
+    colorAttribute: string;
+    imageAttribute: string;
+}
+/**
+ * To share the texture between the program instances of the graph and the
+ * hovered nodes (to prevent some flickering, mostly), this program must be
+ * "built" for each sigma instance:
+ */
+export default function createNodeImageProgram<N extends Attributes = Attributes, E extends Attributes = Attributes, G extends Attributes = Attributes>(options?: Partial<CreateNodeImageProgramOptions<N, E, G>>): NodeProgramType<N, E, G>;
+export {};

web/node_modules/@sigma/node-image/dist/declarations/src/index.d.ts

@@ -0,0 +1,4 @@
+import { NodeProgramType } from "sigma/rendering";
+export { default as createNodeImageProgram } from "./factory.js";
+export declare const NodeImageProgram: NodeProgramType;
+export declare const NodePictogramProgram: NodeProgramType;

web/node_modules/@sigma/node-image/dist/declarations/src/texture.d.ts

@@ -0,0 +1,135 @@
+import { EventEmitter } from "events";
+import { Coordinates } from "sigma/types";
+/**
+ * Useful types:
+ * *************
+ */
+export type TextureCursor = Coordinates & {
+    rowHeight: number;
+    maxRowWidth: number;
+};
+export type ImageLoading = {
+    status: "loading";
+};
+export type ImageError = {
+    status: "error";
+};
+export type ImageReady = {
+    status: "ready";
+    image: HTMLImageElement;
+    sourceX: number;
+    sourceY: number;
+    sourceSize: number;
+    destinationSize: number;
+    textureIndex?: number;
+};
+export type ImageType = ImageLoading | ImageError | ImageReady;
+export type Atlas = Record<string, Coordinates & {
+    size: number;
+    textureIndex?: number;
+}>;
+export type TextureManagerOptions = {
+    size: {
+        mode: "auto";
+    } | {
+        mode: "max";
+        value: number;
+    } | {
+        mode: "force";
+        value: number;
+    };
+    objectFit: "contain" | "cover" | "fill";
+    correctCentering: boolean;
+    maxTextureSize: number;
+    debounceTimeout: number | null;
+    crossOrigin: CrossOrigin | null;
+};
+type CrossOrigin = "anonymous" | "use-credentials";
+export declare const DEFAULT_TEXTURE_MANAGER_OPTIONS: TextureManagerOptions;
+export declare const MARGIN_IN_TEXTURE = 1;
+/**
+ * Helpers:
+ * ********
+ */
+/**
+ * This helper loads an image at a given URL, and returns an HTMLImageElement
+ * with it displayed once it's properly loaded, within a promise.
+ */
+export declare function loadRasterImage(imageSource: string, { crossOrigin }?: {
+    crossOrigin?: CrossOrigin;
+}): Promise<HTMLImageElement>;
+/**
+ * This helper loads an SVG image at a given URL, adjusts its size to a given
+ * size, and returns an HTMLImageElement with it displayed once it's properly
+ * loaded, within a promise.
+ */
+export declare function loadSVGImage(imageSource: string, { size, crossOrigin }?: {
+    size?: number;
+    crossOrigin?: CrossOrigin;
+}): Promise<HTMLImageElement>;
+/**
+ * This helper loads an image using the proper function.
+ */
+export declare function loadImage(imageSource: string, { size, crossOrigin }?: {
+    size?: number;
+    crossOrigin?: CrossOrigin;
+}): Promise<HTMLImageElement>;
+/**
+ * This helper computes exact coordinates to draw an image onto a texture.
+ */
+export declare function refineImage(image: HTMLImageElement, corrector: PictogramCenteringCorrector, { objectFit, size, correctCentering }: TextureManagerOptions): Omit<ImageReady, "status" | "image" | "textureIndex">;
+/**
+ * This helper takes an array of ready-to-draw images, and draws as much as possible in a single texture.
+ * It then returns the atlas of the draw images, as well as the texture itself.
+ */
+export declare function drawTexture(images: (Omit<ImageReady, "status"> & {
+    key: string;
+})[], ctx: CanvasRenderingContext2D, cursor: TextureCursor): {
+    atlas: Atlas;
+    texture: ImageData;
+    cursor: TextureCursor;
+};
+/**
+ * This helper takes a collection of image states and a context, draw all the
+ * images in the context, and returns an atlas to get where each image is drawn
+ * on the texture.
+ */
+export declare function drawTextures({ atlas: prevAtlas, textures: prevTextures, cursor: prevCursor, }: {
+    atlas: Atlas;
+    textures: ImageData[];
+    cursor: TextureCursor;
+}, images: Record<string, ImageType>, ctx: CanvasRenderingContext2D): {
+    atlas: Atlas;
+    textures: ImageData[];
+    cursor: TextureCursor;
+};
+/**
+ * This class helps to "correct" the centering of an SVG pictogram by finding
+ * the "true" visually correct center through the barycenter of the pictogram's
+ * alpha layer in x and y dimension.
+ */
+export declare class PictogramCenteringCorrector {
+    canvas: HTMLCanvasElement;
+    context: CanvasRenderingContext2D;
+    constructor();
+    getCorrectionOffset(image: HTMLImageElement, size: number): Coordinates;
+}
+export declare class TextureManager extends EventEmitter {
+    static NEW_TEXTURE_EVENT: string;
+    private options;
+    private canvas;
+    private ctx;
+    private frameId?;
+    private corrector;
+    private imageStates;
+    private textures;
+    private lastTextureCursor;
+    private atlas;
+    constructor(options?: Partial<TextureManagerOptions>);
+    private scheduleGenerateTexture;
+    private generateTextures;
+    registerImage(source: string): Promise<void>;
+    getAtlas(): Atlas;
+    getTextures(): ImageData[];
+}
+export {};

web/node_modules/@sigma/node-image/dist/sigma-node-image.cjs.d.mts

@@ -0,0 +1,2 @@
+export * from "./declarations/src/index.js";
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoic2lnbWEtbm9kZS1pbWFnZS5janMuZC5tdHMiLCJzb3VyY2VSb290IjoiIiwic291cmNlcyI6WyIuL2RlY2xhcmF0aW9ucy9zcmMvaW5kZXguZC50cyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiQUFBQSJ9

web/node_modules/@sigma/node-image/dist/sigma-node-image.cjs.d.ts

@@ -0,0 +1,2 @@
+export * from "./declarations/src/index.js";
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoic2lnbWEtbm9kZS1pbWFnZS5janMuZC50cyIsInNvdXJjZVJvb3QiOiIiLCJzb3VyY2VzIjpbIi4vZGVjbGFyYXRpb25zL3NyYy9pbmRleC5kLnRzIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiJBQUFBIn0=

web/node_modules/@sigma/node-image/dist/sigma-node-image.cjs.js

@@ -0,0 +1,7 @@
+'use strict';
+
+if (process.env.NODE_ENV === "production") {
+  module.exports = require("./sigma-node-image.cjs.prod.js");
+} else {
+  module.exports = require("./sigma-node-image.cjs.dev.js");
+}

web/node_modules/@sigma/node-image/dist/sigma-node-image.cjs.mjs

@@ -0,0 +1,5 @@
+export {
+  NodeImageProgram,
+  NodePictogramProgram,
+  createNodeImageProgram
+} from "./sigma-node-image.cjs.js";