fix: remove duplicate move_schematic_component tool registration and add regression test

The PR added a second server.tool("move_schematic_component", ...) at line 1127
without removing the original registration at line 722, causing the server to
fail on startup with "Tool move_schematic_component is already registered".

Also adds tests/test_ts_tool_registry.py which scans all src/tools/**/*.ts files
for duplicate server.tool() names so this class of bug is caught automatically.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_ts_tool_registry.py

@@ -0,0 +1,61 @@
+"""
+Regression test: no MCP tool name is registered more than once across all
+TypeScript tool files in src/tools/.
+
+This caught a real bug where move_schematic_component was registered twice
+(once in the original code and once in the PR adding wire-preservation),
+causing the server to fail on startup with:
+  Error: Tool move_schematic_component is already registered
+"""
+
+import re
+from collections import Counter
+from pathlib import Path
+
+import pytest
+
+SRC_TOOLS_DIR = Path(__file__).parent.parent / "src" / "tools"
+
+# Pattern matches the tool-name argument to server.tool(
+#   server.tool(
+#     "some_tool_name",
+_SERVER_TOOL_RE = re.compile(r'server\.tool\(\s*["\']([a-zA-Z0-9_]+)["\']')
+
+
+@pytest.mark.unit
+class TestTsToolRegistry:
+    def _collect_registrations(self):
+        """Return list of (tool_name, file, line_no) for every server.tool() call."""
+        registrations = []
+        for ts_file in sorted(SRC_TOOLS_DIR.glob("**/*.ts")):
+            text = ts_file.read_text(encoding="utf-8")
+            for m in _SERVER_TOOL_RE.finditer(text):
+                line_no = text[: m.start()].count("\n") + 1
+                registrations.append((m.group(1), ts_file.name, line_no))
+        return registrations
+
+    def test_no_duplicate_tool_names(self):
+        """Every tool name must appear exactly once across all TS tool files."""
+        registrations = self._collect_registrations()
+        assert registrations, "No server.tool() calls found — check SRC_TOOLS_DIR path"
+
+        counts = Counter(name for name, _, _ in registrations)
+        duplicates = {name: count for name, count in counts.items() if count > 1}
+
+        if duplicates:
+            details = []
+            for dup_name in sorted(duplicates):
+                locations = [
+                    f"  {fname}:{line}" for name, fname, line in registrations if name == dup_name
+                ]
+                details.append(f"{dup_name} ({duplicates[dup_name]}x):\n" + "\n".join(locations))
+            pytest.fail(
+                "Duplicate MCP tool registrations found — server will fail to start:\n\n"
+                + "\n\n".join(details)
+            )
+
+    def test_tool_files_exist(self):
+        """Sanity check: src/tools/ directory must be present and contain TS files."""
+        assert SRC_TOOLS_DIR.is_dir(), f"src/tools/ not found at {SRC_TOOLS_DIR}"
+        ts_files = list(SRC_TOOLS_DIR.glob("**/*.ts"))
+        assert ts_files, "No .ts files found in src/tools/"