chore: update project state and prepare for image support development

- Add comprehensive image test document with various image types
- Update project structure with development artifacts
- Prepare foundation for image support enhancement phase
- Include test files for validating image editing workflows

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

node_modules/@jridgewell/remapping/src/source-map.ts

@@ -0,0 +1,38 @@
+import { toDecodedMap, toEncodedMap } from '@jridgewell/gen-mapping';
+
+import type { GenMapping } from '@jridgewell/gen-mapping';
+import type { DecodedSourceMap, EncodedSourceMap, Options } from './types';
+
+/**
+ * A SourceMap v3 compatible sourcemap, which only includes fields that were
+ * provided to it.
+ */
+export default class SourceMap {
+  declare file?: string | null;
+  declare mappings: EncodedSourceMap['mappings'] | DecodedSourceMap['mappings'];
+  declare sourceRoot?: string;
+  declare names: string[];
+  declare sources: (string | null)[];
+  declare sourcesContent?: (string | null)[];
+  declare version: 3;
+  declare ignoreList: number[] | undefined;
+
+  constructor(map: GenMapping, options: Options) {
+    const out = options.decodedMappings ? toDecodedMap(map) : toEncodedMap(map);
+    this.version = out.version; // SourceMap spec says this should be first.
+    this.file = out.file;
+    this.mappings = out.mappings as SourceMap['mappings'];
+    this.names = out.names as SourceMap['names'];
+    this.ignoreList = out.ignoreList as SourceMap['ignoreList'];
+    this.sourceRoot = out.sourceRoot;
+
+    this.sources = out.sources as SourceMap['sources'];
+    if (!options.excludeContent) {
+      this.sourcesContent = out.sourcesContent as SourceMap['sourcesContent'];
+    }
+  }
+
+  toString(): string {
+    return JSON.stringify(this);
+  }
+}