feat: v2.0 — card UI, AI agents (Claude/DeepSeek), collapsible commands

Major update:
- Card-based session layout with colored group indicators
- AI agent: Claude API, DeepSeek API, local keyword search
- Collapsible command panel — more space for agent
- macOS build script (build_mac.sh)
- Updated README with Windows/macOS install instructions
- Config persistence in pca_config.json

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

build.bat

@@ -1,23 +1,32 @@
 @echo off
-echo === KU SSH Manager — Build ===
+echo === PCA SSH v2.0 — Build for Windows ===
 
 where python >nul 2>&1
 if errorlevel 1 (
     echo Python not found! Install from https://python.org/downloads/
+    echo Check "Add Python to PATH" during install!
     pause
     exit /b 1
 )
 
 echo Installing dependencies...
-pip install paramiko pyinstaller
+pip install paramiko pillow pyinstaller
 
-echo Building .exe...
-pyinstaller --onefile --noconsole --name "KU SSH Manager" ^
-    --add-data "sessions.json;." ^
-    --icon NONE ^
-    ssh_manager.py
+echo Generating icon...
+python gen_icon.py
+
+echo Building PCA_SSH.exe...
+if exist pca_ssh.ico (
+    pyinstaller --onefile --noconsole --name "PCA_SSH" --icon=pca_ssh.ico ssh_manager.py
+) else (
+    pyinstaller --onefile --noconsole --name "PCA_SSH" ssh_manager.py
+)
 
 echo.
-echo Done! EXE: dist\KU SSH Manager.exe
-echo Copy it anywhere — sessions.json saves next to .exe
+if exist dist\PCA_SSH.exe (
+    echo DONE! EXE: dist\PCA_SSH.exe
+    echo Copy it anywhere — sessions.json and pca_config.json save next to .exe
+) else (
+    echo BUILD FAILED
+)
 pause