refactor(elisp): generalize validate-el.sh test-runner for flat layouts

Phase 2 test lookup now triggers for any .el file outside tests/, not
just modules/*.el. Stem-based test matching works the same way; this
just broadens the case pattern.

Before: only modules/foo.el → tests/test-foo*.el triggered Phase 2.
After: foo.el, lib/foo.el, modules/foo.el all do.

init.el and early-init.el are still Phase-1-only (byte-compile would
load the full package graph).

Verified on:
  - emacs.d (modules/-based): modules/browser-config.el still runs
    its matching test, exit 0
  - flat layout (scratch /tmp): source.el at project root successfully
    finds and runs tests/test-source.el

1 files changed, 10 insertions, 4 deletions

diff --git a/languages/elisp/claude/hooks/validate-el.sh b/languages/elisp/claude/hooks/validate-el.sh
index 5fd4241..956feaa 100644..100755
--- a/languages/elisp/claude/hooks/validate-el.sh
+++ b/languages/elisp/claude/hooks/validate-el.sh
@@ -44,12 +44,13 @@ case "$f" in
 esac
 
 # --- Phase 2: test runner ---
-# Determine which tests (if any) apply to this edit.
+# Determine which tests (if any) apply to this edit. Works for projects with
+# source at root, in modules/, or elsewhere — stem-based test lookup is the
+# common pattern.
 tests=()
 case "$f" in
-  "$PROJECT_ROOT/modules/"*.el)
-    stem="$(basename "${f%.el}")"
-    mapfile -t tests < <(find "$PROJECT_ROOT/tests" -maxdepth 1 -name "test-${stem}*.el" 2>/dev/null | sort)
+  */init.el|*/early-init.el)
+    : # Phase 1 handled it; skip test runner
     ;;
   "$PROJECT_ROOT/tests/testutil-"*.el)
     stem="$(basename "${f%.el}")"
@@ -59,6 +60,11 @@ case "$f" in
   "$PROJECT_ROOT/tests/test-"*.el)
     tests=("$f")
     ;;
+  *.el)
+    # Any other .el under the project — find matching tests by stem
+    stem="$(basename "${f%.el}")"
+    mapfile -t tests < <(find "$PROJECT_ROOT/tests" -maxdepth 1 -name "test-${stem}*.el" 2>/dev/null | sort)
+    ;;
 esac
 
 count="${#tests[@]}"