feat(resolution): mixed iOS / React Native / Expo cross-language bridging (#430)

Implements the design from `docs/design/mixed-ios-and-react-native-bridging.md`.
Closes the cross-language flow gap so `trace` / `callers` / `callees` / `impact` connect end-to-end across language boundaries in real iOS, React Native, and Expo codebases.

## Bridges shipped

| Boundary | Mechanism | Real-codebase validation |
|---|---|---|
| **Swift ↔ Objective-C** | Resolver applying Apple's @objc auto-bridging name math + Cocoa preposition prefixes | Charts (S, 269) · realm-swift (M, 369) · wikipedia-ios (L, 1734) |
| **React Native legacy bridge** | Resolver parsing `RCT_EXPORT_MODULE` / `RCT_EXPORT_METHOD` / `RCT_REMAP_METHOD` (ObjC) + `@ReactMethod` (Java/Kotlin) | AsyncStorage (S, ~60) · react-native-svg (M, ~700) · react-native-firebase (L, ~1100) |
| **React Native TurboModules** | Resolver treating `Native<X>.ts` spec interface as ground truth | via RNSvg + RNFirebase subsets |
| **Native → JS events** | Synthesizer matching native `sendEventWithName:`/`emit(...)` to JS `addListener('e', handler)` keyed by literal event name; falls back to enclosing constant/variable for wrapper-API parameter handlers | RNGeolocation (S) · RNFirebase (L) |
| **Expo Modules** | Framework extract synthesizes `method` nodes from Swift/Kotlin `Module { Name("X"); Function("y") { ... } }` DSL | expo-haptics (S, 14) · expo-camera (M, 72) · ExpoSweep (L, 332, 7 packages) |
| **Fabric + legacy Paper view components** | Extract `component` + `property` nodes from Codegen `codegenNativeComponent<Props>('Name', ...)` specs AND legacy `RCT_EXPORT_VIEW_PROPERTY` / `@ReactProp` macros, then synthesize component → native class by name+suffix convention | react-native-segmented-control (S, legacy) · react-native-screens (M, Codegen) · react-native-skia (L, hybrid monorepo) |

## Bug fixes surfaced along the way

- `tree-sitter.ts` message_expression — multi-keyword ObjC call sites now reconstruct `a🅱️` selectors so they resolve to multi-part method definitions (gap discovered post-#165; 0 → 84 call edges to `GET:parameters:...` style methods on AFNetworking).
- `src/index.ts` resolver lifecycle — `indexAll()` now re-initializes the resolver after extraction so framework `detect()` sees the populated index. Pre-existing latent bug that affected UIKit and SwiftUI resolvers too.
- `src/extraction/index.ts` `buildDetectionContext` — added `listDirectories` so framework detect() can probe monorepo subpackages uniformly (fix needed for react-native-skia detection).

## Regression check on 5 control repos

| Repo | Result |
|---|---|
| Express (small JS) | ✅ unchanged — 266 routes, express framework detected |
| Excalidraw (medium TS/React) | ✅ 9284 nodes (CLAUDE.md baseline ~9290); canonical `trace(mutateElement, renderStaticScene)` returns the flow |
| Django realworld (Python) | ✅ django framework detected, 16 routes |
| Spring petclinic (Java) | ✅ spring framework detected, 17 routes |
| Texture (pure ObjC, large) | ✅ exactly matches #165 baseline: 4702 methods, 894 classes, 808/808 file coverage, 913 multi-keyword selectors, 55 protocols, 1036 properties |

## Tests

928 passing (+87 net new bridge tests across the 5 channels); 2 pre-existing skips. The mcp-staleness-banner / watcher parallel flakiness is unchanged by this work (different test fails each run, all pass in isolation; pre-existing on main).

## Documentation

- README: new 'Mixed iOS / React Native / Expo bridging' section with the per-boundary table and validation-corpus links.
- CHANGELOG `[Unreleased]`: full entry per bridge with measurements.
- `docs/design/mixed-ios-and-react-native-bridging.md`: the design doc (§8 measurements filled in across §8a-§8g).
- `docs/design/dynamic-dispatch-coverage-playbook.md` §6 coverage matrix: six new rows.
- `.claude/skills/agent-eval/corpus.json`: four new sections covering 15 real GitHub repos for the eval harness.

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

__tests__/extraction.test.ts

@@ -3987,6 +3987,35 @@ void helperFunction(int count) {
     expect(calls).toEqual(expect.arrayContaining(['NSLog', 'doWork', 'MyClass.shared', 'obj.greet']));
   });
 
+  it('should reconstruct multi-keyword selectors at the call site so they resolve to the method definition', () => {
+    // Regression for the gap discovered post-#165: message_expression's
+    // multi-keyword form `[obj a:1 b:2]` was only emitting the first keyword,
+    // so calls never resolved to multi-part method definitions like
+    // `GET:parameters:headers:progress:success:failure:`. The call-site name
+    // must match the method-definition name with full keywords + trailing colons.
+    const code = `
+@implementation Caller
+- (void)demo {
+    NSMutableDictionary *d = [NSMutableDictionary new];
+    [d setObject:@"v" forKey:@"k"];
+    [d setObject:@"v2" forKey:@"k2" withRetry:@YES];
+    [self touchesBegan:nil withEvent:nil];
+}
+@end
+`;
+    const result = extractFromSource('Caller.m', code);
+    const calls = result.unresolvedReferences
+      .filter((r) => r.referenceKind === 'calls')
+      .map((r) => r.referenceName);
+    expect(calls).toEqual(
+      expect.arrayContaining([
+        'd.setObject:forKey:',
+        'd.setObject:forKey:withRetry:',
+        'touchesBegan:withEvent:',
+      ])
+    );
+  });
+
   it('should not classify pure C headers with @end in comments as objc', () => {
     const cHeader = '/* @end of file */\n#ifndef STDIO_H\nvoid printf(const char *);\n#endif\n';
     expect(detectLanguage('stdio.h', cHeader)).toBe('c');