Add Claude Code integration: shared config + Setup tab

- Shared servers.json at ~/.server-connections/ (GUI + Claude Code)
- Setup tab: one-click install of ssh.py, /ssh skill, SSH key
- Duplicate checks — safe to run multiple times
- tools/ssh.py + tools/skill-ssh.md bundled
- Updated README with integration docs (EN/RU/ZH)
- Deploy guide for new machines

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

gui/tabs/setup_tab.py

@@ -0,0 +1,126 @@
+"""
+Setup tab — one-click installation for Claude Code integration.
+"""
+
+import threading
+import customtkinter as ctk
+from core.claude_setup import check_status, install_all, install_ssh_script, install_skill, generate_ssh_key
+
+
+class SetupTab(ctk.CTkFrame):
+    def __init__(self, master, store):
+        super().__init__(master, fg_color="transparent")
+        self.store = store
+
+        # Header
+        ctk.CTkLabel(
+            self, text="Claude Code Integration",
+            font=ctk.CTkFont(size=20, weight="bold")
+        ).pack(padx=20, pady=(20, 5))
+
+        ctk.CTkLabel(
+            self,
+            text="Setup everything so Claude Code can manage your servers via /ssh skill.\n"
+                 "Both GUI and Claude Code share the same servers.json — add a server here,\n"
+                 "Claude sees it immediately.",
+            text_color="#9ca3af", justify="center"
+        ).pack(padx=20, pady=(0, 15))
+
+        # Status card
+        self.status_frame = ctk.CTkFrame(self)
+        self.status_frame.pack(fill="x", padx=20, pady=10)
+
+        ctk.CTkLabel(
+            self.status_frame, text="Status",
+            font=ctk.CTkFont(size=14, weight="bold"), anchor="w"
+        ).pack(fill="x", padx=15, pady=(10, 5))
+
+        self._status_labels: dict[str, ctk.CTkLabel] = {}
+        status_items = [
+            ("shared_dir", "Shared config dir (~/.server-connections)"),
+            ("servers_json", "servers.json"),
+            ("ssh_script", "ssh.py (CLI tool)"),
+            ("skill_installed", "/ssh skill for Claude Code"),
+            ("ssh_key_exists", "SSH key (ed25519)"),
+        ]
+        for key, label in status_items:
+            row = ctk.CTkFrame(self.status_frame, fg_color="transparent")
+            row.pack(fill="x", padx=15, pady=2)
+            indicator = ctk.CTkLabel(row, text="\u25cf", width=20, text_color="#6b7280")
+            indicator.pack(side="left")
+            ctk.CTkLabel(row, text=label, anchor="w").pack(side="left", fill="x", expand=True)
+            self._status_labels[key] = indicator
+
+        # Buttons
+        btn_frame = ctk.CTkFrame(self, fg_color="transparent")
+        btn_frame.pack(fill="x", padx=20, pady=15)
+
+        self.install_all_btn = ctk.CTkButton(
+            btn_frame, text="Install Everything",
+            font=ctk.CTkFont(size=14, weight="bold"),
+            height=40, fg_color="#22c55e", hover_color="#16a34a",
+            command=self._install_all
+        )
+        self.install_all_btn.pack(fill="x", pady=(0, 10))
+
+        # Individual buttons row
+        ind_frame = ctk.CTkFrame(btn_frame, fg_color="transparent")
+        ind_frame.pack(fill="x")
+
+        ctk.CTkButton(ind_frame, text="ssh.py", width=100, fg_color="#6b7280",
+                      command=self._install_script).pack(side="left", padx=(0, 5))
+        ctk.CTkButton(ind_frame, text="/ssh skill", width=100, fg_color="#6b7280",
+                      command=self._install_skill).pack(side="left", padx=5)
+        ctk.CTkButton(ind_frame, text="SSH key", width=100, fg_color="#6b7280",
+                      command=self._gen_key).pack(side="left", padx=5)
+        ctk.CTkButton(ind_frame, text="Refresh", width=80, fg_color="#3b82f6",
+                      command=self._refresh_status).pack(side="right")
+
+        # Log
+        self.log = ctk.CTkTextbox(self, height=150, font=ctk.CTkFont(family="Consolas", size=11), state="disabled")
+        self.log.pack(fill="both", expand=True, padx=20, pady=(5, 20))
+
+        # Initial status check
+        self._refresh_status()
+
+    def _log(self, text: str):
+        self.log.configure(state="normal")
+        self.log.insert("end", text + "\n")
+        self.log.configure(state="disabled")
+        self.log.see("end")
+
+    def _refresh_status(self):
+        status = check_status()
+        for key, label in self._status_labels.items():
+            if status.get(key, False):
+                label.configure(text="\u25cf", text_color="#22c55e")  # green
+            else:
+                label.configure(text="\u25cf", text_color="#ef4444")  # red
+
+    def _install_all(self):
+        self.install_all_btn.configure(state="disabled", text="Installing...")
+
+        def _do():
+            results = install_all()
+            for msg in results:
+                self.after(0, lambda m=msg: self._log(m))
+            self.after(0, self._refresh_status)
+            self.after(0, lambda: self._log("\nDone! Claude Code can now use /ssh to manage your servers."))
+            self.after(0, lambda: self.install_all_btn.configure(state="normal", text="Install Everything"))
+
+        threading.Thread(target=_do, daemon=True).start()
+
+    def _install_script(self):
+        msg = install_ssh_script()
+        self._log(msg)
+        self._refresh_status()
+
+    def _install_skill(self):
+        msg = install_skill()
+        self._log(msg)
+        self._refresh_status()
+
+    def _gen_key(self):
+        msg = generate_ssh_key()
+        self._log(msg)
+        self._refresh_status()