feat: run claude as non-root for bypassPermissions + replace MCP menu with live tools view

backend/main.py

@@ -231,6 +231,7 @@ class ClaudeProcessManager:
         self._broadcast_queues: List[asyncio.Queue] = []
         self._is_ready = False
         self._status = "not_started"  # not_started, starting, ready, dead
+        self._available_tools: List[dict] = []  # populated from system/init event
 
     @property
     def status(self):
@@ -249,17 +250,18 @@ class ClaudeProcessManager:
             self._status = "starting"
             logger.info("Starting Claude interactive process...")
 
+            # Run as non-root user so --permission-mode bypassPermissions is allowed
+            # (Claude CLI refuses bypassPermissions when running as root)
             env = os.environ.copy()
+            env["HOME"] = "/home/claudeuser"
 
             # Build command: interactive claude with stream-json I/O
             # --permission-mode bypassPermissions allows the agent to use all tools
             # (Bash, file ops, MCP servers) without interactive confirmation prompts
             cmd = [
-                "claude",
-                "--output-format", "stream-json",
-                "--input-format", "stream-json",
-                "--verbose",
-                "--permission-mode", "bypassPermissions",
+                "su", "-s", "/bin/bash", "claudeuser", "-c",
+                "claude --output-format stream-json --input-format stream-json "
+                "--verbose --permission-mode bypassPermissions"
             ]
 
             try:
@@ -359,7 +361,8 @@ class ClaudeProcessManager:
         if event_type == "system" and event.get("subtype") == "init":
             self._current_session_id = event.get("session_id")
             self._is_ready = True
-            logger.info(f"Claude session initialized: {self._current_session_id}")
+            self._available_tools = event.get("tools", [])
+            logger.info(f"Claude session initialized: {self._current_session_id}, tools: {len(self._available_tools)}")
 
         elif event_type == "result":
             # End of a response turn
@@ -636,6 +639,29 @@ async def claude_status():
     }
 
 
+@app.get("/api/claude/tools")
+async def claude_tools():
+    """Return the tools available in the current Claude session (from system/init)."""
+    tools = claude_mgr._available_tools
+    # Group by MCP server prefix (e.g. "mcp__truenas__list_pools" -> "truenas")
+    servers: dict = {}
+    builtin = []
+    for t in tools:
+        name = t.get("name", "")
+        if name.startswith("mcp__"):
+            parts = name.split("__")
+            server = parts[1] if len(parts) > 1 else "unknown"
+            servers.setdefault(server, []).append(name)
+        else:
+            builtin.append(name)
+    return {
+        "total": len(tools),
+        "mcp_servers": {k: len(v) for k, v in servers.items()},
+        "builtin_tools": builtin,
+        "raw": tools,
+    }
+
+
 # -------- Chat --------
 
 @app.get("/api/chat/sessions")