feat: channel settings modal now has name editing

Added [OVERVIEW] tab to ChannelSettingsModal with an editable
channel name field. The ⚙ button on each channel opens the modal.
Users can rename channels without needing to know about the
right-click context menu.

web/src/components/ChannelSettingsModal.tsx

@@ -1,7 +1,9 @@
-import { useEffect, useState } from 'react';
-import { usePermissionStore, PERMISSION_LABELS, PERMS, type ChannelOverride, hasPermission } from '../stores/permissions.ts';
-import { useRoleStore } from '../stores/role.ts';
-import { useMemberStore } from '../stores/member.ts';
+import { useEffect, useState } from "react";
+import { usePermissionStore, PERMISSION_LABELS, PERMS, type ChannelOverride, hasPermission } from "../stores/permissions.ts";
+import { useRoleStore } from "../stores/role.ts";
+import { useMemberStore } from "../stores/member.ts";
+import { useChannelStore } from "../stores/channel.ts";
+import { api } from "../lib/api.ts";
 
 interface ChannelSettingsModalProps {
   serverId: string;
@@ -10,7 +12,7 @@ interface ChannelSettingsModalProps {
   onClose: () => void;
 }
 
-type Tab = 'permissions';
+type Tab = 'overview' | 'permissions';
 type TargetMode = 'role' | 'user';
 
 interface OverrideFormData {
@@ -76,10 +78,13 @@ function OverrideMatrix({ allow, deny, onChange }: { allow: number; deny: number
 }
 
 export function ChannelSettingsModal({ serverId, channelId, channelName, onClose }: ChannelSettingsModalProps) {
-  const [tab] = useState<Tab>('permissions');
+  const [tab, setTab] = useState<Tab>('overview');
   const [form, setForm] = useState<OverrideFormData>({ targetType: 'role', targetId: '', allow: 0, deny: 0 });
   const [saving, setSaving] = useState(false);
   const [error, setError] = useState<string | null>(null);
+  const [editName, setEditName] = useState(channelName);
+  const [savingName, setSavingName] = useState(false);
+  const updateChannel = useChannelStore((s) => s.updateChannel);
 
   const overrides = usePermissionStore((s) => s.overridesByChannel[channelId] || []);
   const fetchOverrides = usePermissionStore((s) => s.fetchOverrides);
@@ -122,6 +127,24 @@ export function ChannelSettingsModal({ serverId, channelId, channelName, onClose
     }
   };
 
+  const handleSaveName = async () => {
+    const name = editName.trim();
+    if (!name || name === channelName) return;
+    setSavingName(true);
+    setError(null);
+    try {
+      const updated = await api.patch<{ id: string; server_id: string; name: string; type: string; category: string | null; position: number; group_id?: string | null }>(
+        `/servers/${serverId}/channels/${channelId}`,
+        { name }
+      );
+      updateChannel(updated as any);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to rename channel');
+    } finally {
+      setSavingName(false);
+    }
+  };
+
   const targets = form.targetType === 'role'
     ? roles.filter((r) => !r.is_default).map((r) => ({ id: r.id, label: r.name }))
     : members.map((m) => ({ id: m.id, label: m.username }));
@@ -134,9 +157,31 @@ export function ChannelSettingsModal({ serverId, channelId, channelName, onClose
           <button onClick={onClose} className="text-xs text-gb-red">[x]</button>
         </div>
         <div className="flex border-b border-gb-bg-t">
-          <button className="px-4 py-2 text-xs text-gb-orange bg-gb-bg-s">[PERMISSIONS]</button>
+          <button onClick={() => setTab('overview')} className={`px-4 py-2 text-xs ${tab === 'overview' ? 'text-gb-orange bg-gb-bg-s' : 'text-gb-fg-s hover:text-gb-fg'}`}>[OVERVIEW]</button>
+          <button onClick={() => setTab('permissions')} className={`px-4 py-2 text-xs ${tab === 'permissions' ? 'text-gb-orange bg-gb-bg-s' : 'text-gb-fg-s hover:text-gb-fg'}`}>[PERMISSIONS]</button>
         </div>
         <div className="flex-1 overflow-y-auto p-4">
+          {tab === 'overview' && (
+            <div className="space-y-3">
+              <div className="text-xs text-gb-fg-f">Channel name</div>
+              <div className="flex gap-2">
+                <input
+                  value={editName}
+                  onChange={(e) => setEditName(e.target.value)}
+                  onKeyDown={(e) => { if (e.key === 'Enter') handleSaveName(); }}
+                  className="terminal-input text-sm flex-1"
+                />
+                <button
+                  onClick={handleSaveName}
+                  disabled={savingName || !editName.trim() || editName.trim() === channelName}
+                  className="px-3 py-1 bg-gb-orange text-gb-bg text-xs disabled:opacity-50"
+                >
+                  {savingName ? 'SAVING...' : '[SAVE]'}
+                </button>
+              </div>
+              {error && <div className="text-xs text-gb-red">ERR: {error}</div>}
+            </div>
+          )}
           {tab === 'permissions' && (
             <div className="space-y-3">
               <div className="text-xs text-gb-fg-f">Existing overrides</div>