fix(resolution,cli): cross-file static method calls + affected path normalization (#825) (#865)

Cross-file `ClassName.staticMethod()` calls resolved to the class, not the
method: the import resolver matched the receiver `Foo` to the named class
import but dropped the `.bar` member, and createEdges then mis-promoted the
`calls` edge to `instantiates`. So callers/impact for the static method came
back empty. Descend from the resolved class into its `Container::member` so the
call links to the method; fall back to the class when no such member exists
(non-`::` languages and genuine class references are unaffected).

Also normalize `codegraph affected` inputs to the project-relative,
forward-slash form the index stores, so `./src/x.ts`, an absolute path, and a
Windows back-slash path all match (previously silently returned 0).

Validated on luxon (24 files): node/edge totals identical (no explosion), 69
mis-promoted `instantiates` edges become `calls`, and real static factories
(DateTime.fromISO, etc.) resolve their callers. Full suite: 1534 passed.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

src/bin/codegraph.ts

@@ -1198,6 +1198,23 @@ program
     }
   });
 
+/**
+ * Normalize a user-supplied file path to the project-relative, forward-slash
+ * form CodeGraph stores in the index. Accepts an absolute path, a `./`-prefixed
+ * path, or Windows back-slashes; an empty string when the input is blank. Used
+ * by `codegraph affected` so `./src/x.ts`, `/abs/repo/src/x.ts`, and
+ * `src/x.ts` all match the same indexed file. (#825)
+ */
+function normalizeIndexPath(filePath: string, projectPath: string): string {
+  let f = filePath.trim();
+  if (!f) return '';
+  if (path.isAbsolute(f)) f = path.relative(projectPath, f);
+  // Collapse `.`/`..` segments, then force forward slashes and drop a leading
+  // `./` (path.normalize already strips it on POSIX; explicit for Windows).
+  f = path.normalize(f).replace(/\\/g, '/').replace(/^\.\//, '');
+  return f;
+}
+
 /**
  * Convert glob pattern to regex
  */
@@ -1710,6 +1727,14 @@ program
         changedFiles.push(...stdinFiles);
       }
 
+      // Normalize inputs to the project-relative, forward-slash form the index
+      // stores. Without this, `affected ./src/x.ts`, an absolute path (what a
+      // wrapping script often passes), or a Windows back-slash path silently
+      // matches nothing and reports 0 affected tests. (#825)
+      changedFiles = changedFiles
+        .map((f) => normalizeIndexPath(f, projectPath))
+        .filter(Boolean);
+
       if (changedFiles.length === 0) {
         if (!options.quiet) info('No files provided. Use file arguments or --stdin.');
         process.exit(0);