ai: add api key indicator

.config/quickshell/ii/modules/sidebarLeft/AiChat.qml

@@ -199,7 +199,7 @@ Inline w/ backslash and round brackets \\(e^{i\\pi} + 1 = 0\\)
 
         RowLayout {
             id: statusItemRowLayout
-            spacing: 4
+            spacing: 0
             MaterialSymbol {
                 text: statusItem.icon
                 iconSize: Appearance.font.pixelSize.huge
@@ -232,18 +232,22 @@ Inline w/ backslash and round brackets \\(e^{i\\pi} + 1 = 0\\)
 
         RowLayout { // Status
             Layout.alignment: Qt.AlignHCenter
-            spacing: 8
+            spacing: 10
 
+            StatusItem {
+                icon: Ai.currentModelHasApiKey ? "key" : "key_off"
+                statusText: ""
+                description: Ai.currentModelHasApiKey ? Translation.tr("API key is set") : Translation.tr("No API key\nSet it with /key YOUR_API_KEY")
+            }
+            StatusSeparator {}
             StatusItem {
                 icon: "device_thermostat"
                 statusText: Ai.temperature.toFixed(1)
                 description: Translation.tr("Temperature")
             }
-
             StatusSeparator {
                 visible: Ai.tokenCount.total > 0
-            }            
-
+            }
             StatusItem {
                 visible: Ai.tokenCount.total > 0
                 icon: "token"

.config/quickshell/ii/services/Ai.qml

@@ -23,6 +23,13 @@ Singleton {
     property var messageByID: ({})
     readonly property var apiKeys: KeyringStorage.keyringData?.apiKeys ?? {}
     readonly property var apiKeysLoaded: KeyringStorage.loaded
+    readonly property bool currentModelHasApiKey: {
+        const model = models[currentModelId];
+        if (!model || !model.requires_key) return true;
+        if (!apiKeysLoaded) return false;
+        const key = apiKeys[model.key_id];
+        return (key?.length > 0);
+    }
     property var postResponseHook
     property real temperature: Persistent.states?.ai?.temperature ?? 0.5
     property QtObject tokenCount: QtObject {
@@ -45,6 +52,8 @@ Singleton {
     property list<var> promptFiles: [...defaultPrompts, ...userPrompts]
     property list<var> savedChats: []
 
+    // Gemini: https://ai.google.dev/gemini-api/docs/function-calling
+    // OpenAI: https://platform.openai.com/docs/guides/function-calling
     property var tools: {
         "gemini": [{"functionDeclarations": [
             {