feat: enhance search, ranking, reranker and CLI tooling across ccw and codex-lens

Major improvements to smart-search, chain-search cascade, ranking pipeline,
reranker factory, CLI history store, codex-lens integration, and uv-manager.
Simplify command-generator skill by inlining phases. Add comprehensive tests.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ccw/tests/codexlens-path.test.js

@@ -0,0 +1,66 @@
+import { after, afterEach, describe, it } from 'node:test';
+import assert from 'node:assert/strict';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { createRequire, syncBuiltinESMExports } from 'node:module';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+const require = createRequire(import.meta.url);
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const fs = require('node:fs');
+
+const originalExistsSync = fs.existsSync;
+const originalCodexLensDataDir = process.env.CODEXLENS_DATA_DIR;
+const tempDirs = [];
+
+afterEach(() => {
+  fs.existsSync = originalExistsSync;
+  syncBuiltinESMExports();
+
+  if (originalCodexLensDataDir === undefined) {
+    delete process.env.CODEXLENS_DATA_DIR;
+  } else {
+    process.env.CODEXLENS_DATA_DIR = originalCodexLensDataDir;
+  }
+});
+
+after(() => {
+  while (tempDirs.length > 0) {
+    rmSync(tempDirs.pop(), { recursive: true, force: true });
+  }
+});
+
+describe('codexlens-path hidden python selection', () => {
+  it('prefers pythonw.exe for hidden Windows subprocesses when available', async () => {
+    if (process.platform !== 'win32') {
+      return;
+    }
+
+    const dataDir = mkdtempSync(join(tmpdir(), 'ccw-codexlens-hidden-python-'));
+    tempDirs.push(dataDir);
+    process.env.CODEXLENS_DATA_DIR = dataDir;
+
+    const expectedPythonw = join(dataDir, 'venv', 'Scripts', 'pythonw.exe');
+    fs.existsSync = (path) => String(path) === expectedPythonw;
+    syncBuiltinESMExports();
+
+    const moduleUrl = new URL(`../dist/utils/codexlens-path.js?t=${Date.now()}`, import.meta.url);
+    const mod = await import(moduleUrl.href);
+
+    assert.equal(mod.getCodexLensHiddenPython(), expectedPythonw);
+  });
+
+  it('falls back to python.exe when pythonw.exe is unavailable', async () => {
+    const dataDir = mkdtempSync(join(tmpdir(), 'ccw-codexlens-hidden-fallback-'));
+    tempDirs.push(dataDir);
+    process.env.CODEXLENS_DATA_DIR = dataDir;
+
+    fs.existsSync = () => false;
+    syncBuiltinESMExports();
+
+    const moduleUrl = new URL(`../dist/utils/codexlens-path.js?t=${Date.now()}`, import.meta.url);
+    const mod = await import(moduleUrl.href);
+
+    assert.equal(mod.getCodexLensHiddenPython(), mod.getCodexLensPython());
+  });
+});