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/source-map-js/source-map.d.ts

@@ -0,0 +1,104 @@
+export interface StartOfSourceMap {
+    file?: string;
+    sourceRoot?: string;
+}
+
+export interface RawSourceMap extends StartOfSourceMap {
+    version: string;
+    sources: string[];
+    names: string[];
+    sourcesContent?: string[];
+    mappings: string;
+}
+
+export interface Position {
+    line: number;
+    column: number;
+}
+
+export interface LineRange extends Position {
+    lastColumn: number;
+}
+
+export interface FindPosition extends Position {
+    // SourceMapConsumer.GREATEST_LOWER_BOUND or SourceMapConsumer.LEAST_UPPER_BOUND
+    bias?: number;
+}
+
+export interface SourceFindPosition extends FindPosition {
+    source: string;
+}
+
+export interface MappedPosition extends Position {
+    source: string;
+    name?: string;
+}
+
+export interface MappingItem {
+    source: string | null;
+    generatedLine: number;
+    generatedColumn: number;
+    originalLine: number | null;
+    originalColumn: number | null;
+    name: string | null;
+}
+
+export class SourceMapConsumer {
+    static GENERATED_ORDER: number;
+    static ORIGINAL_ORDER: number;
+
+    static GREATEST_LOWER_BOUND: number;
+    static LEAST_UPPER_BOUND: number;
+
+    constructor(rawSourceMap: RawSourceMap);
+    readonly file: string | undefined | null;
+    readonly sourceRoot: string | undefined | null;
+    readonly sourcesContent: readonly string[] | null | undefined;
+    readonly sources: readonly string[]
+
+    computeColumnSpans(): void;
+    originalPositionFor(generatedPosition: FindPosition): MappedPosition;
+    generatedPositionFor(originalPosition: SourceFindPosition): LineRange;
+    allGeneratedPositionsFor(originalPosition: MappedPosition): Position[];
+    hasContentsOfAllSources(): boolean;
+    sourceContentFor(source: string, returnNullOnMissing?: boolean): string | null;
+    eachMapping(callback: (mapping: MappingItem) => void, context?: any, order?: number): void;
+}
+
+export interface Mapping {
+    generated: Position;
+    original?: Position | null;
+    source?: string | null;
+    name?: string | null;
+}
+
+export class SourceMapGenerator {
+    constructor(startOfSourceMap?: StartOfSourceMap);
+    static fromSourceMap(sourceMapConsumer: SourceMapConsumer, startOfSourceMap?: StartOfSourceMap): SourceMapGenerator;
+    addMapping(mapping: Mapping): void;
+    setSourceContent(sourceFile: string, sourceContent: string | null | undefined): void;
+    applySourceMap(sourceMapConsumer: SourceMapConsumer, sourceFile?: string, sourceMapPath?: string): void;
+    toString(): string;
+    toJSON(): RawSourceMap;
+}
+
+export interface CodeWithSourceMap {
+    code: string;
+    map: SourceMapGenerator;
+}
+
+export class SourceNode {
+    constructor();
+    constructor(line: number, column: number, source: string);
+    constructor(line: number, column: number, source: string, chunk?: string, name?: string);
+    static fromStringWithSourceMap(code: string, sourceMapConsumer: SourceMapConsumer, relativePath?: string): SourceNode;
+    add(chunk: string): void;
+    prepend(chunk: string): void;
+    setSourceContent(sourceFile: string, sourceContent: string): void;
+    walk(fn: (chunk: string, mapping: MappedPosition) => void): void;
+    walkSourceContents(fn: (file: string, content: string) => void): void;
+    join(sep: string): SourceNode;
+    replaceRight(pattern: string, replacement: string): SourceNode;
+    toString(): string;
+    toStringWithSourceMap(startOfSourceMap?: StartOfSourceMap): CodeWithSourceMap;
+}