Add channel config editing: PSK, uplink, downlink

- [e] edit name, [r] cycle role (existing)
- [p] edit PSK as base64 (supports "default", empty for unencrypted)
- [u] toggle uplink enabled
- [D] toggle downlink enabled
- Expand saveChannel to support all channel settings

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: statico

src/ui/App.tsx

@@ -1186,7 +1186,7 @@ export function App({ address, packetStore, nodeStore, skipConfig = false, skipN
     }
   }, [myNodeNum, transport, configOwner, showNotification, batchEditMode, batchEditCount]);
 
-  const saveChannel = useCallback(async (channelIndex: number, updates: { name?: string; role?: number }) => {
+  const saveChannel = useCallback(async (channelIndex: number, updates: { name?: string; role?: number; psk?: Uint8Array; uplinkEnabled?: boolean; downlinkEnabled?: boolean }) => {
     if (!transport || !myNodeNum) return;
     const channel = configChannels.find(c => c.index === channelIndex);
     if (!channel) return;
@@ -1198,6 +1198,9 @@ export function App({ address, packetStore, nodeStore, skipConfig = false, skipN
         settings: create(Mesh.ChannelSettingsSchema, {
           ...channel.settings,
           name: updates.name !== undefined ? updates.name : channel.settings?.name,
+          psk: updates.psk !== undefined ? updates.psk : channel.settings?.psk,
+          uplinkEnabled: updates.uplinkEnabled !== undefined ? updates.uplinkEnabled : channel.settings?.uplinkEnabled,
+          downlinkEnabled: updates.downlinkEnabled !== undefined ? updates.downlinkEnabled : channel.settings?.downlinkEnabled,
         }),
       });
       const binary = adminHelper.createSetChannelRequest(updatedChannel, { myNodeNum });
@@ -2000,11 +2003,35 @@ export function App({ address, packetStore, nodeStore, skipConfig = false, skipN
               setLocalMeshViewUrl(newUrl);
               showNotification(newUrl ? `MeshView URL set to ${newUrl}` : "MeshView URL cleared");
             } else if (configSection === "channels" && configEditing?.startsWith("channel")) {
-              // Save channel name - parse channel index from field key like "channel0_name"
-              const match = configEditing.match(/^channel(\d+)_name$/);
-              if (match) {
-                const channelIndex = parseInt(match[1], 10);
+              // Save channel settings - parse channel index from field key like "channel0_name" or "channel0_psk"
+              const nameMatch = configEditing.match(/^channel(\d+)_name$/);
+              const pskMatch = configEditing.match(/^channel(\d+)_psk$/);
+              if (nameMatch) {
+                const channelIndex = parseInt(nameMatch[1], 10);
                 saveChannel(channelIndex, { name: configEditValue });
+              } else if (pskMatch) {
+                const channelIndex = parseInt(pskMatch[1], 10);
+                // Parse base64 PSK
+                try {
+                  const trimmed = configEditValue.trim();
+                  if (trimmed === "" || trimmed === "0") {
+                    // Empty or "0" means unencrypted
+                    saveChannel(channelIndex, { psk: new Uint8Array([0]) });
+                  } else if (trimmed === "1" || trimmed.toLowerCase() === "default") {
+                    // "1" or "default" means default key
+                    saveChannel(channelIndex, { psk: new Uint8Array([1]) });
+                  } else {
+                    // Try to decode as base64
+                    const decoded = atob(trimmed);
+                    const psk = new Uint8Array(decoded.length);
+                    for (let i = 0; i < decoded.length; i++) {
+                      psk[i] = decoded.charCodeAt(i);
+                    }
+                    saveChannel(channelIndex, { psk });
+                  }
+                } catch {
+                  showNotification("Invalid base64 key");
+                }
               }
             }
             setConfigEditing(null);
@@ -2082,6 +2109,44 @@ export function App({ address, packetStore, nodeStore, skipConfig = false, skipN
             }
             return;
           }
+          // 'p' to edit PSK
+          if (input === "p") {
+            const channel = validChannels[selectedChannelIndex];
+            if (channel) {
+              setConfigEditing(`channel${channel.index}_psk`);
+              // Show current PSK as base64
+              const psk = channel.settings?.psk;
+              if (psk && psk.length > 0 && !(psk.length === 1 && psk[0] === 0)) {
+                const binary = String.fromCharCode(...psk);
+                try {
+                  setConfigEditValue(btoa(binary));
+                } catch {
+                  setConfigEditValue("");
+                }
+              } else {
+                setConfigEditValue("");
+              }
+            }
+            return;
+          }
+          // 'u' to toggle uplink
+          if (input === "u") {
+            const channel = validChannels[selectedChannelIndex];
+            if (channel) {
+              const newValue = !channel.settings?.uplinkEnabled;
+              saveChannel(channel.index, { uplinkEnabled: newValue });
+            }
+            return;
+          }
+          // 'D' to toggle downlink (capital to avoid conflict with DM shortcut)
+          if (input === "D") {
+            const channel = validChannels[selectedChannelIndex];
+            if (channel) {
+              const newValue = !channel.settings?.downlinkEnabled;
+              saveChannel(channel.index, { downlinkEnabled: newValue });
+            }
+            return;
+          }
         }
       }
     }

src/ui/components/ConfigPanel.tsx

@@ -800,7 +800,7 @@ function ChannelsConfigView({ channels, selectedIndex = 0, editingField, editVal
         <Box flexDirection="column" marginTop={1} borderStyle="single" borderColor={theme.border.normal} borderTop borderBottom={false} borderLeft={false} borderRight={false}>
           <Box marginBottom={1}>
             <Text color={theme.fg.accent} bold>Channel {selectedChannel.index}</Text>
-            <Text color={theme.fg.muted}> j/k=navigate e=edit name r=cycle role</Text>
+            <Text color={theme.fg.muted}> [e]name [r]role [p]psk [u]up [D]down</Text>
           </Box>
           <EditableConfigRow
             label="Name"
@@ -816,10 +816,14 @@ function ChannelsConfigView({ channels, selectedIndex = 0, editingField, editVal
               {Channel.Channel_Role[selectedChannel.role]}
             </Text>
           </Box>
-          <Box>
-            <Text color={theme.fg.muted}>{"Encryption".padEnd(24)}</Text>
-            <Text color={theme.packet.encrypted}>{formatPsk(selectedChannel.settings?.psk)}</Text>
-          </Box>
+          <EditableConfigRow
+            label="Encryption (base64)"
+            value={formatPsk(selectedChannel.settings?.psk)}
+            fieldKey={`channel${selectedChannel.index}_psk`}
+            editingField={editingField}
+            editValue={editValue}
+            hint=""
+          />
           <Box>
             <Text color={theme.fg.muted}>{"Uplink Enabled".padEnd(24)}</Text>
             <Text color={selectedChannel.settings?.uplinkEnabled ? theme.status.online : theme.fg.muted}>