Add cross-platform packaging, icons, and Claude Code config discovery

- Auto-discovers Claude Code (~/.claude/settings.json) alongside Claude Desktop
- Generated icons/app.icns (macOS) and icons/app.ico (Windows) from rounded PNGs
- bcc.spec: PyInstaller spec for all platforms (.app on macOS, onefile on Windows/Linux)
- .github/workflows/release.yml: builds and publishes GitHub Release on version tags
- scripts/build_icons.py: regenerates icon files from source PNGs
- requirements-dev.txt: adds pyinstaller and pillow for building
- CLAUDE.md: initial repo guidance for Claude Code

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

scripts/build_icons.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+"""
+Generate icons/app.ico (Windows) and icons/app.icns (macOS) from the
+rounded PNG source files in icons/twin-gears/rounded/.
+
+Run from the repo root:
+    python scripts/build_icons.py
+
+Requirements:
+    pip install pillow          # for .ico
+    iconutil                   # built into macOS; for .icns
+"""
+from __future__ import annotations
+
+import os
+import platform
+import shutil
+import subprocess
+import sys
+import tempfile
+from pathlib import Path
+
+ROOT = Path(__file__).parent.parent
+SRC = ROOT / "icons" / "twin-gears" / "rounded"
+OUT = ROOT / "icons"
+
+
+def build_ico():
+    try:
+        from PIL import Image
+    except ImportError:
+        print("Pillow not installed — skipping .ico generation (pip install pillow)")
+        return
+
+    sizes = [16, 32, 48, 64, 128, 256]
+    imgs = []
+    for s in sizes:
+        p = SRC / f"icon-{s}.png"
+        if not p.exists():
+            print(f"  Missing {p.name}, skipping")
+            continue
+        imgs.append(Image.open(p).convert("RGBA"))
+
+    if not imgs:
+        print("  No source PNGs found — cannot build .ico")
+        return
+
+    dest = OUT / "app.ico"
+    imgs[-1].save(dest, format="ICO", append_images=imgs[:-1])
+    print(f"  Generated {dest.relative_to(ROOT)}  ({dest.stat().st_size // 1024 + 1} KB)")
+
+
+def build_icns():
+    if shutil.which("iconutil") is None:
+        print("  iconutil not found (macOS-only) — skipping .icns generation")
+        return
+
+    iconset = Path(tempfile.mkdtemp()) / "app.iconset"
+    iconset.mkdir()
+    mapping = {
+        "icon_16x16.png":    "icon-16.png",
+        "icon_16x16@2x.png": "icon-32.png",
+        "icon_32x32.png":    "icon-32.png",
+        "icon_32x32@2x.png": "icon-64.png",
+        "icon_128x128.png":  "icon-128.png",
+        "icon_128x128@2x.png": "icon-256.png",
+        "icon_256x256.png":  "icon-256.png",
+        "icon_256x256@2x.png": "icon-512.png",
+        "icon_512x512.png":  "icon-512.png",
+        "icon_512x512@2x.png": "icon-1024.png",
+    }
+    for dst_name, src_name in mapping.items():
+        src = SRC / src_name
+        if src.exists():
+            shutil.copy2(src, iconset / dst_name)
+        else:
+            print(f"  Missing {src_name}, skipping {dst_name}")
+
+    dest = OUT / "app.icns"
+    subprocess.run(
+        ["iconutil", "-c", "icns", str(iconset), "-o", str(dest)],
+        check=True,
+    )
+    shutil.rmtree(iconset.parent)
+    print(f"  Generated {dest.relative_to(ROOT)}  ({dest.stat().st_size // 1024} KB)")
+
+
+if __name__ == "__main__":
+    print("Building icons/app.ico  ...")
+    build_ico()
+    print("Building icons/app.icns ...")
+    build_icns()
+    print("Done.")