fix: board outline position and rounded corners (3 bugs)

Bug 1 — Rounded corners missing (src/tools/board.ts schema)
  Symptom: Claude sends shape='rectangle' + radius=2.5, but the Zod schema
  only listed 'rectangle', 'circle', 'polygon' as valid shapes. The JS
  handler never passed cornerRadius through the IPC path, and Python only
  generated arcs for shape='rounded_rectangle'. Result: 4 straight lines,
  no arcs.
  Fix: Added 'rounded_rectangle' and 'cornerRadius' to the Zod schema in
  src/tools/board.ts so Claude can send the correct shape directly.
  Also added a Python-side auto-upgrade: if shape='rectangle' and
  cornerRadius>0, silently promote to 'rounded_rectangle' so legacy
  callers still work (python/commands/board/outline.py).

Bug 2 — Board outline placed at (-w/2, -h/2) instead of (0, 0)
  Symptom: A 30x30 mm board outline was placed centred at the origin
  (start -15 -15) ... (end 15 15) instead of the expected top-left at
  (0,0) → (30,30).
  Root cause: src/tools/board.ts extracted x/y from params and renamed
  them to centerX/centerY before forwarding to Python:
      const { x, y, ...otherParams } = params;
      callKicadScript('add_board_outline', { centerX: x, centerY: y, ...otherParams })
  Python received centerX=0, centerY=0 and used that as the board centre,
  placing the outline at (-15,-15)→(+15,+15).
  Fix: Pass x/y directly as top-left corner coordinates. Python already
  contains the correct logic: center = x + width/2, y + height/2. Removed
  the incorrect rename in board.ts:
      callKicadScript('add_board_outline', { shape, ...params })

Bug 3 — print() on stdout corrupted JSON-RPC protocol → Timeout
  Symptom: Claude Desktop reported 'Timeout' for add_board_outline even
  though Python completed the command in <5 ms. KiCAD was falsely launched.
  Root cause: Debug print() statements written to stdout (the same channel
  used for JSON-RPC responses) injected non-JSON lines into the protocol.
  Node.js could not parse the response → timeout → Claude Desktop invented
  a 'KiCAD UI required' workaround.
  Fix: Removed all print() calls from outline.py. Logger.info/debug writes
  to the log file (~/.kicad-mcp/logs/kicad_interface.log) and is safe.

Files changed:
  src/tools/board.ts               — Zod schema + removed centerX/centerY rename
  python/commands/board/outline.py — auto-upgrade rectangle+radius, remove print()

python/commands/board/outline.py

@@ -36,8 +36,11 @@ class BoardOutlineCommands:
             width = inner.get("width")
             height = inner.get("height")
             radius = inner.get("radius")
-            # Accept both "cornerRadius" and "radius" (schema uses "radius" for rounded_rectangle)
-            corner_radius = inner.get("cornerRadius", inner.get("radius", 0) if shape == "rounded_rectangle" else 0)
+            # Accept both "cornerRadius" and "radius" regardless of shape name.
+            # The AI often sends shape="rectangle" with radius=2.5 — we treat that as rounded_rectangle.
+            corner_radius = inner.get("cornerRadius", inner.get("radius", 0))
+            if shape == "rectangle" and corner_radius > 0:
+                shape = "rounded_rectangle"
             points = inner.get("points", [])
             unit = inner.get("unit", "mm")