Remove TypeScript path mappings in favor of relative imports

Fixes https://github.com/xtermjs/xterm.js/issues/5896

TypeScript path mappings for common/*, browser/*, and headless/*
were not rewritten in emitted JavaScript, which forced webpack resolve
aliases and NODE_PATH workarounds so runtime could resolve modules.
That added build complexity and broke tooling such as ESLint import/no-cycle.

Changes:
- Convert ~750 imports across src/, addons/, and test/ to relative paths
- Remove common/browser/headless paths and src catch-all mappings from tsconfigs
  (keep @xterm/addon-* demo and addon typings paths)
- Remove webpack resolve.alias for common, browser, headless, and vs
- Drop NODE_PATH from unit tests, benchmarks, and VS Code launch config
- Fix addon-image IIPImageStorage to import ./Types after removing catch-all *

Verified: npm run build, esbuild, package, package-headless
Co-authored-by: Cursor <cursoragent@cursor.com>

addons/addon-serialize/benchmark/SerializeAddon.benchmark.ts

@@ -6,8 +6,8 @@
 import { perfContext, before, ThroughputRuntimeCase } from 'xterm-benchmark';
 
 import { spawn } from 'node-pty';
-import { Utf8ToUtf32, stringFromCodePoint } from 'common/input/TextDecoder';
-import { Terminal } from 'browser/public/Terminal';
+import { Utf8ToUtf32, stringFromCodePoint } from '../../../src/common/input/TextDecoder';
+import { Terminal } from '../../../src/browser/public/Terminal';
 import { SerializeAddon } from 'SerializeAddon';
 
 class TestTerminal extends Terminal {

addons/addon-serialize/benchmark/tsconfig.json

@@ -6,24 +6,36 @@
     ],
     "rootDir": "..",
     "outDir": "../out-benchmark",
-    "types": ["../../../node_modules/@types/node"],
+    "types": [
+      "../../../node_modules/@types/node"
+    ],
     "moduleResolution": "nodenext",
     "strict": false,
     "target": "es2021",
     "module": "nodenext",
     "paths": {
-      "common/*": ["../../../src/common/*"],
-      "browser/*": ["../../../src/browser/*"],
-      "SerializeAddon": ["../src/SerializeAddon"],
+      "SerializeAddon": [
+        "../src/SerializeAddon"
+      ],
       "@xterm/addon-serialize": [
         "../typings/addon-serialize.d.ts"
       ]
     }
   },
-  "include": ["../**/*", "../../../typings/xterm.d.ts"],
-  "exclude": ["../../../**/*test.ts", "../../**/*api.ts"],
+  "include": [
+    "../**/*",
+    "../../../typings/xterm.d.ts"
+  ],
+  "exclude": [
+    "../../../**/*test.ts",
+    "../../**/*api.ts"
+  ],
   "references": [
-    { "path": "../../../src/common" },
-    { "path": "../../../src/browser" }
+    {
+      "path": "../../../src/common"
+    },
+    {
+      "path": "../../../src/browser"
+    }
   ]
 }

addons/addon-serialize/package.json

@@ -21,8 +21,8 @@
     "package": "../../node_modules/.bin/webpack",
     "prepublishOnly": "npm run package",
     "start": "node ../../demo/start",
-    "benchmark": "NODE_PATH=../../out:./out:./out-benchmark/ ../../node_modules/.bin/xterm-benchmark -r 5 -c benchmark/benchmark.json",
-    "benchmark-baseline": "NODE_PATH=../../out:./out:./out-benchmark/ ../../node_modules/.bin/xterm-benchmark -r 5 -c benchmark/benchmark.json --baseline out-benchmark/benchmark/*benchmark.js",
-    "benchmark-eval": "NODE_PATH=../../out:./out:./out-benchmark/ ../../node_modules/.bin/xterm-benchmark -r 5 -c benchmark/benchmark.json --eval out-benchmark/benchmark/*benchmark.js"
+    "benchmark": "../../node_modules/.bin/xterm-benchmark -r 5 -c benchmark/benchmark.json",
+    "benchmark-baseline": "../../node_modules/.bin/xterm-benchmark -r 5 -c benchmark/benchmark.json --baseline out-benchmark/benchmark/*benchmark.js",
+    "benchmark-eval": "../../node_modules/.bin/xterm-benchmark -r 5 -c benchmark/benchmark.json --eval out-benchmark/benchmark/*benchmark.js"
   }
 }

addons/addon-serialize/src/SerializeAddon.test.ts

@@ -6,10 +6,10 @@
 import jsdom = require('jsdom');
 import { assert } from 'chai';
 import { SerializeAddon } from './SerializeAddon';
-import { Terminal } from 'browser/public/Terminal';
-import { SelectionModel } from 'browser/selection/SelectionModel';
-import { IBufferService } from 'common/services/Services';
-import { ThemeService } from 'browser/services/ThemeService';
+import { Terminal } from '../../../src/browser/public/Terminal';
+import { SelectionModel } from '../../../src/browser/selection/SelectionModel';
+import { IBufferService } from '../../../src/common/services/Services';
+import { ThemeService } from '../../../src/browser/services/ThemeService';
 
 function sgr(...seq: string[]): string {
   return `\x1b[${seq.join(';')}m`;

addons/addon-serialize/src/SerializeAddon.ts

@@ -7,9 +7,9 @@
 
 import type { IBuffer, IBufferCell, IBufferRange, ITerminalAddon, Terminal } from '@xterm/xterm';
 import type { IHTMLSerializeOptions, SerializeAddon as ISerializeApi, ISerializeOptions, ISerializeRange } from '@xterm/addon-serialize';
-import { IAttributeData, IColor } from 'common/Types';
-import { DEFAULT_ANSI_COLORS } from 'browser/Types';
-import { UnderlineStyle } from 'common/buffer/Constants';
+import { IAttributeData, IColor } from '../../../src/common/Types';
+import { DEFAULT_ANSI_COLORS } from '../../../src/browser/Types';
+import { UnderlineStyle } from '../../../src/common/buffer/Constants';
 
 function constrain(value: number, low: number, high: number): number {
   return Math.max(low, Math.min(value, high));

addons/addon-serialize/src/tsconfig.json

@@ -11,12 +11,6 @@
     "sourceMap": true,
     "removeComments": true,
     "paths": {
-      "common/*": [
-        "../../../src/common/*"
-      ],
-      "browser/*": [
-        "../../../src/browser/*"
-      ],
       "@xterm/addon-serialize": [
         "../typings/addon-serialize.d.ts"
       ]

addons/addon-serialize/test/tsconfig.json

@@ -9,14 +9,6 @@
     "outDir": "../out-test",
     "sourceMap": true,
     "removeComments": true,
-    "paths": {
-      "common/*": [
-        "../../../src/common/*"
-      ],
-      "browser/*": [
-        "../../../src/browser/*"
-      ]
-    },
     "strict": true,
     "types": [
       "../../../node_modules/@types/node"

addons/addon-serialize/webpack.config.js

@@ -24,10 +24,6 @@ module.exports = {
   resolve: {
     modules: ['./node_modules'],
     extensions: [ '.js' ],
-    alias: {
-      common: path.resolve('../../out/common'),
-      browser: path.resolve('../../out/browser')
-    }
   },
   output: {
     filename: mainFile,