New channel config (#807)

* Channel config rework

Add staged channel config with tabbed UI, import/export workflow, and global form state refactor

* Improve import dialog config comparison and UI labels

* Review fixes

* Improve state handling

* Fix default filter behaviour

---------

Co-authored-by: philon- <philon-@users.noreply.github.com>

packages/web/public/i18n/locales/en/channels.json

@@ -3,7 +3,9 @@
     "sectionLabel": "Channels",
     "channelName": "Channel: {{channelName}}",
     "broadcastLabel": "Primary",
-    "channelIndex": "Ch {{index}}"
+    "channelIndex": "Ch {{index}}",
+    "import": "Import",
+    "export": "Export"
   },
   "validation": {
     "pskInvalid": "Please enter a valid {{bits}} bit PSK."

packages/web/public/i18n/locales/en/dialog.json

@@ -16,15 +16,19 @@
     }
   },
   "import": {
-    "description": "The current LoRa configuration will be overridden.",
+    "description": "Import a Channel Set from a Meshtastic URL. <br />Valid Meshtasic URLs start with \"<italic>https://meshtastic.org/e/...</italic>\"",
     "error": {
       "invalidUrl": "Invalid Meshtastic URL"
     },
-    "channelPrefix": "Channel: ",
+    "channelPrefix": "Channel ",
+    "primary": "Primary ",
+    "doNotImport": "No not import",
+    "channelName": "Name",
+    "channelSlot": "Slot",
     "channelSetUrl": "Channel Set/QR Code URL",
-    "channels": "Channels:",
-    "usePreset": "Use Preset?",
-    "title": "Import Channel Set"
+    "useLoraConfig": "Import LoRa Config",
+    "presetDescription": "The current LoRa Config will be replaced.",
+    "title": "Import Channels"
   },
   "locationResponse": {
     "title": "Location: {{identifier}}",

packages/web/public/i18n/locales/en/ui.json

@@ -4,9 +4,10 @@
     "messages": "Messages",
     "map": "Map",
     "config": "Config",
+    "channels": "Channels",
     "radioConfig": "Radio Config",
     "moduleConfig": "Module Config",
-    "channels": "Channels",
+    "channelConfig": "Channel Config",
     "nodes": "Nodes"
   },
   "app": {
@@ -67,6 +68,10 @@
       "title": "Saving Config",
       "description": "The configuration change {{case}} has been saved."
     },
+    "saveAllSuccess": {
+      "title": "Saved",
+      "description": "All configuration changes have been saved."
+    },
     "favoriteNode": {
       "title": "{{action}} {{nodeName}} {{direction}} favorites.",
       "action": {