Initial commit: ServerManager GUI application

CustomTkinter desktop app for managing remote servers.
Features: SSH terminal, SFTP file transfer, key management,
background status monitoring, server CRUD with dark theme.

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

gui/sidebar.py

@@ -0,0 +1,128 @@
+"""
+Sidebar — server list with search, add/edit/delete buttons.
+"""
+
+import customtkinter as ctk
+from gui.widgets.status_badge import StatusBadge
+
+
+class Sidebar(ctk.CTkFrame):
+    def __init__(self, master, store, on_select=None):
+        super().__init__(master, width=250, corner_radius=0)
+        self.store = store
+        self.on_select = on_select
+        self._selected_alias: str | None = None
+        self._server_frames: dict[str, ctk.CTkFrame] = {}
+        self._badges: dict[str, StatusBadge] = {}
+
+        self.pack_propagate(False)
+
+        # Title
+        title = ctk.CTkLabel(self, text="Servers", font=ctk.CTkFont(size=18, weight="bold"))
+        title.pack(padx=15, pady=(15, 5))
+
+        # Search
+        self.search_var = ctk.StringVar()
+        self.search_var.trace_add("write", lambda *_: self._refresh_list())
+        search = ctk.CTkEntry(self, placeholder_text="Search...", textvariable=self.search_var)
+        search.pack(fill="x", padx=10, pady=(5, 10))
+
+        # Server list
+        self.list_frame = ctk.CTkScrollableFrame(self, fg_color="transparent")
+        self.list_frame.pack(fill="both", expand=True, padx=5, pady=0)
+
+        # Buttons
+        btn_frame = ctk.CTkFrame(self, fg_color="transparent")
+        btn_frame.pack(fill="x", padx=10, pady=10)
+        self.add_btn = ctk.CTkButton(btn_frame, text="+ Add", width=70, height=30, command=self._on_add)
+        self.add_btn.pack(side="left", padx=(0, 3))
+        self.edit_btn = ctk.CTkButton(btn_frame, text="Edit", width=70, height=30, fg_color="#6b7280", command=self._on_edit)
+        self.edit_btn.pack(side="left", padx=3)
+        self.del_btn = ctk.CTkButton(btn_frame, text="Delete", width=70, height=30, fg_color="#ef4444", hover_color="#dc2626", command=self._on_delete)
+        self.del_btn.pack(side="right", padx=(3, 0))
+
+        # Callbacks for add/edit/delete — set by app.py
+        self.add_callback = None
+        self.edit_callback = None
+        self.delete_callback = None
+
+        # Subscribe to store changes
+        self.store.subscribe(self._refresh_list)
+        self._refresh_list()
+
+    def _refresh_list(self):
+        # Clear
+        for widget in self.list_frame.winfo_children():
+            widget.destroy()
+        self._server_frames.clear()
+        self._badges.clear()
+
+        search = self.search_var.get().lower()
+        servers = self.store.get_all()
+
+        for server in servers:
+            alias = server["alias"]
+            ip = server["ip"]
+            stype = server.get("type", "ssh")
+
+            if search and search not in alias.lower() and search not in ip.lower():
+                continue
+
+            frame = ctk.CTkFrame(self.list_frame, cursor="hand2", height=45)
+            frame.pack(fill="x", padx=2, pady=2)
+            frame.pack_propagate(False)
+
+            # Status badge
+            badge = StatusBadge(frame, status=self.store.get_status(alias))
+            badge.pack(side="left", padx=(10, 5), pady=10)
+            self._badges[alias] = badge
+
+            # Info
+            info = ctk.CTkFrame(frame, fg_color="transparent")
+            info.pack(side="left", fill="both", expand=True, padx=5)
+
+            name_label = ctk.CTkLabel(info, text=alias, font=ctk.CTkFont(size=13, weight="bold"), anchor="w")
+            name_label.pack(fill="x")
+            detail = f"{ip}  [{stype}]"
+            detail_label = ctk.CTkLabel(info, text=detail, font=ctk.CTkFont(size=10), text_color="#9ca3af", anchor="w")
+            detail_label.pack(fill="x")
+
+            # Click handlers
+            for widget in [frame, info, name_label, detail_label, badge]:
+                widget.bind("<Button-1>", lambda e, a=alias: self._select(a))
+
+            self._server_frames[alias] = frame
+
+        self._highlight_selected()
+
+    def _select(self, alias: str):
+        self._selected_alias = alias
+        self._highlight_selected()
+        if self.on_select:
+            self.on_select(alias)
+
+    def _highlight_selected(self):
+        for alias, frame in self._server_frames.items():
+            if alias == self._selected_alias:
+                frame.configure(fg_color=("#3b82f6", "#1d4ed8"))
+            else:
+                frame.configure(fg_color=("gray85", "gray20"))
+
+    def get_selected(self) -> str | None:
+        return self._selected_alias
+
+    def update_statuses(self):
+        for alias, badge in self._badges.items():
+            badge.set_status(self.store.get_status(alias))
+
+    def _on_add(self):
+        if self.add_callback:
+            self.add_callback()
+
+    def _on_edit(self):
+        if self.edit_callback and self._selected_alias:
+            self.edit_callback(self._selected_alias)
+
+    def _on_delete(self):
+        if self.delete_callback and self._selected_alias:
+            self.delete_callback(self._selected_alias)