feat(impact): cross-language blast-radius coverage (22 languages + 14 frameworks) (#708)

Completes the cross-file dependency graph behind impact / affected / explore across all 22 supported languages and 14 web frameworks, validated on real-world repos (measured fair-coverage table added to the README). Per-language resolution + framework resolvers/synthesizers (Lua/Luau require, Shopify OS 2.0 Liquid sections, Delphi forms, Rust cross-module + Rocket macros, Swift Fluent, SvelteKit/Nuxt loader/component conventions, RN/Expo bridges). 0 cross-family false edges, full suite green (1187 passed). See #708.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

__tests__/expo-modules.test.ts

@@ -151,4 +151,57 @@ export async function impactAsync() {
     expect(callEdge.length).toBeGreaterThanOrEqual(1);
     expect(callEdge[0].target_id.startsWith('expo-module:')).toBe(true);
   });
+
+  it('extracts GENERIC-typed Kotlin AsyncFunction<T> and pairs the iOS + Android impls', async () => {
+    fs.writeFileSync(
+      path.join(dir, 'package.json'),
+      '{"dependencies":{"expo-modules-core":"^1.0.0"}}'
+    );
+    fs.mkdirSync(path.join(dir, 'ios'));
+    fs.writeFileSync(
+      path.join(dir, 'ios', 'BatteryModule.swift'),
+      `import ExpoModulesCore
+public class BatteryModule: Module {
+  public func definition() -> ModuleDefinition {
+    Name("ExpoBattery")
+    AsyncFunction("getBatteryLevelAsync") { () -> Float in return 1.0 }
+  }
+}
+`
+    );
+    fs.mkdirSync(path.join(dir, 'android'));
+    fs.writeFileSync(
+      path.join(dir, 'android', 'BatteryModule.kt'),
+      `import expo.modules.kotlin.modules.Module
+class BatteryModule : Module() {
+  override fun definition() = ModuleDefinition {
+    Name("ExpoBattery")
+    AsyncFunction<Float>("getBatteryLevelAsync") { 1.0f }
+  }
+}
+`
+    );
+
+    const cg = await CodeGraph.init(dir, { silent: true });
+    await cg.indexAll();
+    const db = (cg as any).db.db;
+
+    // The Android (Kotlin) GENERIC AsyncFunction<Float> is extracted — before the
+    // fix the `<Float>` defeated the regex and it was silently dropped.
+    const kt = db.prepare(
+      "SELECT * FROM nodes WHERE name='getBatteryLevelAsync' AND language='kotlin' AND id LIKE 'expo-module:%'"
+    ).all();
+    expect(kt).toHaveLength(1);
+
+    // The iOS (Swift) and Android (Kotlin) impls of the same JS method are linked
+    // to each other, so a JS call that resolves to one platform reaches the other.
+    const pair = db.prepare(
+      `SELECT count(*) c FROM edges e
+       JOIN nodes s ON s.id=e.source JOIN nodes t ON t.id=e.target
+       WHERE s.name='getBatteryLevelAsync' AND t.name='getBatteryLevelAsync'
+         AND s.language != t.language`
+    ).get();
+    cg.close?.();
+    expect(pair.c).toBeGreaterThanOrEqual(2); // swift->kotlin AND kotlin->swift
+  });
 });