Add ctx context manager, installer, and auto-detect Claude path

- ctx: SQLite-based cross-session context manager for Claude Code
- install.sh: automated installer (deps, files, symlinks, DB, .desktop)
- bterminal.py: replace hardcoded CLAUDE_PATH with auto-detection
- README.md: rewrite in English, document ctx and installation
- .gitignore: add CLAUDE.md

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

install.sh

@@ -0,0 +1,93 @@
+#!/bin/bash
+set -euo pipefail
+
+# BTerminal installer
+# Installs BTerminal + ctx (Claude Code context manager)
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+INSTALL_DIR="$HOME/.local/share/bterminal"
+BIN_DIR="$HOME/.local/bin"
+CONFIG_DIR="$HOME/.config/bterminal"
+CTX_DIR="$HOME/.claude-context"
+DESKTOP_DIR="$HOME/.local/share/applications"
+
+echo "=== BTerminal Installer ==="
+echo ""
+
+# ─── System dependencies ───────────────────────────────────────────────
+
+echo "[1/5] Checking system dependencies..."
+
+MISSING=()
+python3 -c "import gi" 2>/dev/null || MISSING+=("python3-gi")
+python3 -c "import gi; gi.require_version('Gtk', '3.0'); from gi.repository import Gtk" 2>/dev/null || MISSING+=("gir1.2-gtk-3.0")
+python3 -c "import gi; gi.require_version('Vte', '2.91'); from gi.repository import Vte" 2>/dev/null || MISSING+=("gir1.2-vte-2.91")
+
+if [ ${#MISSING[@]} -gt 0 ]; then
+    echo "  Missing: ${MISSING[*]}"
+    echo "  Installing..."
+    sudo apt install -y "${MISSING[@]}"
+else
+    echo "  All dependencies OK."
+fi
+
+# ─── Install files ─────────────────────────────────────────────────────
+
+echo "[2/5] Installing BTerminal..."
+
+mkdir -p "$INSTALL_DIR" "$BIN_DIR" "$CONFIG_DIR" "$CTX_DIR"
+
+cp "$SCRIPT_DIR/bterminal.py" "$INSTALL_DIR/bterminal.py"
+cp "$SCRIPT_DIR/ctx" "$INSTALL_DIR/ctx"
+chmod +x "$INSTALL_DIR/bterminal.py" "$INSTALL_DIR/ctx"
+
+# ─── Symlinks ──────────────────────────────────────────────────────────
+
+echo "[3/5] Creating symlinks in $BIN_DIR..."
+
+ln -sf "$INSTALL_DIR/bterminal.py" "$BIN_DIR/bterminal"
+ln -sf "$INSTALL_DIR/ctx" "$BIN_DIR/ctx"
+
+echo "  bterminal -> $INSTALL_DIR/bterminal.py"
+echo "  ctx       -> $INSTALL_DIR/ctx"
+
+# ─── Init ctx database ────────────────────────────────────────────────
+
+echo "[4/5] Initializing context database..."
+
+if [ -f "$CTX_DIR/context.db" ]; then
+    echo "  Database already exists, skipping."
+else
+    "$BIN_DIR/ctx" list >/dev/null 2>&1
+    echo "  Created $CTX_DIR/context.db"
+fi
+
+# ─── Desktop file ──────────────────────────────────────────────────────
+
+echo "[5/5] Creating desktop entry..."
+
+mkdir -p "$DESKTOP_DIR"
+cat > "$DESKTOP_DIR/bterminal.desktop" << EOF
+[Desktop Entry]
+Name=BTerminal
+Comment=Terminal with SSH & Claude Code session management
+Exec=$BIN_DIR/bterminal
+Icon=utilities-terminal
+Type=Application
+Categories=System;TerminalEmulator;
+Terminal=false
+StartupNotify=true
+EOF
+
+echo ""
+echo "=== Installation complete ==="
+echo ""
+echo "Run BTerminal:"
+echo "  bterminal"
+echo ""
+echo "Context manager:"
+echo "  ctx --help"
+echo ""
+echo "Make sure $BIN_DIR is in your PATH."
+echo "If not, add to ~/.bashrc:"
+echo "  export PATH=\"\$HOME/.local/bin:\$PATH\""