fix(extraction): capture top-level initializer and inline-object-method calls (#465)

The variable / method-definition extractors never walked top-level
initializer values or inline-object method bodies, so calls like
`const token = getTokenMp()` and `methods: { save() { getTokenMp() } }`
showed up nowhere in `codegraph_callers`. The variable extractor now
walks any non-object initializer value; the method-definition extractor
still skips synthetic nodes for inline-object methods (noise rationale
unchanged) but now walks their bodies for calls. Surfaces in plain
`.ts`/`.js` files as well as Vue SFCs (`<script setup>` initializers +
Options API `methods: {...}` / `setup()`), which is where the bug was
originally reported.

Closes #425.

__tests__/extraction.test.ts

@@ -518,6 +518,20 @@ export const authMachine = createMachine({
     expect(varNode).toBeDefined();
     expect(varNode?.isExported).toBe(true);
   });
+
+  it('should extract calls from a top-level variable initializer (issue #425)', () => {
+    const code = `
+import { getTokenMp } from './api/upload';
+
+const token = getTokenMp();
+`;
+    const result = extractFromSource('app.ts', code);
+
+    const call = result.unresolvedReferences.find(
+      (ref) => ref.referenceKind === 'calls' && ref.referenceName === 'getTokenMp'
+    );
+    expect(call).toBeDefined();
+  });
 });
 
 describe('File Node Extraction', () => {
@@ -3600,6 +3614,53 @@ function increment(): void {
     }
   });
 
+  it('should extract calls from top-level <script setup> initializers', () => {
+    const code = `<template>
+  <div>{{ token }}</div>
+</template>
+
+<script setup lang="ts">
+import { getTokenMp } from './api/upload';
+
+const token = getTokenMp();
+</script>
+`;
+    const result = extractFromSource('Issue425Setup.vue', code);
+
+    const call = result.unresolvedReferences.find(
+      (ref) => ref.referenceKind === 'calls' && ref.referenceName === 'getTokenMp'
+    );
+    expect(call).toBeDefined();
+  });
+
+  it('should extract calls from Vue Options API object methods', () => {
+    const code = `<template>
+  <button @click="save">Save</button>
+</template>
+
+<script>
+import { getTokenMp } from './api/upload';
+
+export default {
+  methods: {
+    save() {
+      return getTokenMp();
+    }
+  },
+  setup() {
+    return getTokenMp();
+  }
+}
+</script>
+`;
+    const result = extractFromSource('Issue425Options.vue', code);
+
+    const calls = result.unresolvedReferences.filter(
+      (ref) => ref.referenceKind === 'calls' && ref.referenceName === 'getTokenMp'
+    );
+    expect(calls).toHaveLength(2);
+  });
+
   it('should extract from both <script> and <script setup> blocks', () => {
     const code = `<template>
   <div>{{ msg }}</div>