feat: add default AI profile selection to settings view

- Introduced default AI profile management in the settings view, allowing users to select a default profile for new features.
- Updated the Add Feature dialog to utilize the selected AI profile, setting default model and thinking level based on the chosen profile.
- Enhanced the Feature Defaults section to display and manage the default AI profile, including a dropdown for selection and relevant information display.

apps/ui/src/components/views/board-view/dialogs/add-feature-dialog.tsx

@@ -126,16 +126,25 @@ export function AddFeatureDialog({
     enhancementModel,
     defaultPlanningMode,
     defaultRequirePlanApproval,
+    defaultAIProfileId,
     useWorktrees,
   } = useAppStore();
 
   // Sync defaults when dialog opens
   useEffect(() => {
     if (open) {
+      // Find the default profile if one is set
+      const defaultProfile = defaultAIProfileId
+        ? aiProfiles.find((p) => p.id === defaultAIProfileId)
+        : null;
+
       setNewFeature((prev) => ({
         ...prev,
         skipTests: defaultSkipTests,
         branchName: defaultBranch || "",
+        // Use default profile's model/thinkingLevel if set, else fallback to defaults
+        model: defaultProfile?.model ?? "opus",
+        thinkingLevel: defaultProfile?.thinkingLevel ?? "none",
       }));
       setUseCurrentBranch(true);
       setPlanningMode(defaultPlanningMode);
@@ -147,6 +156,8 @@ export function AddFeatureDialog({
     defaultBranch,
     defaultPlanningMode,
     defaultRequirePlanApproval,
+    defaultAIProfileId,
+    aiProfiles,
   ]);
 
   const handleAdd = () => {

apps/ui/src/components/views/settings-view.tsx

@@ -43,6 +43,9 @@ export function SettingsView() {
     setDefaultPlanningMode,
     defaultRequirePlanApproval,
     setDefaultRequirePlanApproval,
+    defaultAIProfileId,
+    setDefaultAIProfileId,
+    aiProfiles,
   } = useAppStore();
 
   // Convert electron Project to settings-view Project type
@@ -127,12 +130,15 @@ export function SettingsView() {
             useWorktrees={useWorktrees}
             defaultPlanningMode={defaultPlanningMode}
             defaultRequirePlanApproval={defaultRequirePlanApproval}
+            defaultAIProfileId={defaultAIProfileId}
+            aiProfiles={aiProfiles}
             onShowProfilesOnlyChange={setShowProfilesOnly}
             onDefaultSkipTestsChange={setDefaultSkipTests}
             onEnableDependencyBlockingChange={setEnableDependencyBlocking}
             onUseWorktreesChange={setUseWorktrees}
             onDefaultPlanningModeChange={setDefaultPlanningMode}
             onDefaultRequirePlanApprovalChange={setDefaultRequirePlanApproval}
+            onDefaultAIProfileIdChange={setDefaultAIProfileId}
           />
         );
       case "danger":

apps/ui/src/components/views/settings-view/feature-defaults/feature-defaults-section.tsx

@@ -2,7 +2,7 @@ import { Label } from "@/components/ui/label";
 import { Checkbox } from "@/components/ui/checkbox";
 import {
   FlaskConical, Settings2, TestTube, GitBranch, AlertCircle,
-  Zap, ClipboardList, FileText, ScrollText, ShieldCheck
+  Zap, ClipboardList, FileText, ScrollText, ShieldCheck, User
 } from "lucide-react";
 import { cn } from "@/lib/utils";
 import {
@@ -12,6 +12,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from "@/components/ui/select";
+import type { AIProfile } from "@/store/app-store";
 
 type PlanningMode = 'skip' | 'lite' | 'spec' | 'full';
 
@@ -22,12 +23,15 @@ interface FeatureDefaultsSectionProps {
   useWorktrees: boolean;
   defaultPlanningMode: PlanningMode;
   defaultRequirePlanApproval: boolean;
+  defaultAIProfileId: string | null;
+  aiProfiles: AIProfile[];
   onShowProfilesOnlyChange: (value: boolean) => void;
   onDefaultSkipTestsChange: (value: boolean) => void;
   onEnableDependencyBlockingChange: (value: boolean) => void;
   onUseWorktreesChange: (value: boolean) => void;
   onDefaultPlanningModeChange: (value: PlanningMode) => void;
   onDefaultRequirePlanApprovalChange: (value: boolean) => void;
+  onDefaultAIProfileIdChange: (value: string | null) => void;
 }
 
 export function FeatureDefaultsSection({
@@ -37,13 +41,20 @@ export function FeatureDefaultsSection({
   useWorktrees,
   defaultPlanningMode,
   defaultRequirePlanApproval,
+  defaultAIProfileId,
+  aiProfiles,
   onShowProfilesOnlyChange,
   onDefaultSkipTestsChange,
   onEnableDependencyBlockingChange,
   onUseWorktreesChange,
   onDefaultPlanningModeChange,
   onDefaultRequirePlanApprovalChange,
+  onDefaultAIProfileIdChange,
 }: FeatureDefaultsSectionProps) {
+  // Find the selected profile name for display
+  const selectedProfile = defaultAIProfileId
+    ? aiProfiles.find((p) => p.id === defaultAIProfileId)
+    : null;
   return (
     <div
       className={cn(
@@ -169,6 +180,49 @@ export function FeatureDefaultsSection({
         {/* Separator */}
         {defaultPlanningMode === 'skip' && <div className="border-t border-border/30" />}
 
+        {/* Default AI Profile */}
+        <div className="group flex items-start space-x-3 p-3 rounded-xl hover:bg-accent/30 transition-colors duration-200 -mx-3">
+          <div className="w-10 h-10 mt-0.5 rounded-xl flex items-center justify-center shrink-0 bg-brand-500/10">
+            <User className="w-5 h-5 text-brand-500" />
+          </div>
+          <div className="flex-1 space-y-2">
+            <div className="flex items-center justify-between">
+              <Label className="text-foreground font-medium">
+                Default AI Profile
+              </Label>
+              <Select
+                value={defaultAIProfileId ?? "none"}
+                onValueChange={(v: string) => onDefaultAIProfileIdChange(v === "none" ? null : v)}
+              >
+                <SelectTrigger
+                  className="w-[180px] h-8"
+                  data-testid="default-ai-profile-select"
+                >
+                  <SelectValue />
+                </SelectTrigger>
+                <SelectContent>
+                  <SelectItem value="none">
+                    <span className="text-muted-foreground">None (pick manually)</span>
+                  </SelectItem>
+                  {aiProfiles.map((profile) => (
+                    <SelectItem key={profile.id} value={profile.id}>
+                      <span>{profile.name}</span>
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+            </div>
+            <p className="text-xs text-muted-foreground/80 leading-relaxed">
+              {selectedProfile
+                ? `New features will use the "${selectedProfile.name}" profile (${selectedProfile.model}, ${selectedProfile.thinkingLevel} thinking).`
+                : "Pre-select an AI profile when creating new features. Choose \"None\" to pick manually each time."}
+            </p>
+          </div>
+        </div>
+
+        {/* Separator */}
+        <div className="border-t border-border/30" />
+
         {/* Profiles Only Setting */}
         <div className="group flex items-start space-x-3 p-3 rounded-xl hover:bg-accent/30 transition-colors duration-200 -mx-3">
           <Checkbox

apps/ui/src/store/app-store.ts

@@ -494,6 +494,7 @@ export interface AppState {
 
   defaultPlanningMode: PlanningMode;
   defaultRequirePlanApproval: boolean;
+  defaultAIProfileId: string | null;
 
   // Plan Approval State
   // When a plan requires user approval, this holds the pending approval details
@@ -742,6 +743,7 @@ export interface AppActions {
 
   setDefaultPlanningMode: (mode: PlanningMode) => void;
   setDefaultRequirePlanApproval: (require: boolean) => void;
+  setDefaultAIProfileId: (profileId: string | null) => void;
 
   // Plan Approval actions
   setPendingPlanApproval: (approval: {
@@ -841,6 +843,7 @@ const initialState: AppState = {
   specCreatingForProject: null,
   defaultPlanningMode: 'skip' as PlanningMode,
   defaultRequirePlanApproval: false,
+  defaultAIProfileId: null,
   pendingPlanApproval: null,
 };
 
@@ -2265,6 +2268,7 @@ export const useAppStore = create<AppState & AppActions>()(
 
       setDefaultPlanningMode: (mode) => set({ defaultPlanningMode: mode }),
       setDefaultRequirePlanApproval: (require) => set({ defaultRequirePlanApproval: require }),
+      setDefaultAIProfileId: (profileId) => set({ defaultAIProfileId: profileId }),
 
       // Plan Approval actions
       setPendingPlanApproval: (approval) => set({ pendingPlanApproval: approval }),
@@ -2340,6 +2344,7 @@ export const useAppStore = create<AppState & AppActions>()(
         boardBackgroundByProject: state.boardBackgroundByProject,
         defaultPlanningMode: state.defaultPlanningMode,
         defaultRequirePlanApproval: state.defaultRequirePlanApproval,
+        defaultAIProfileId: state.defaultAIProfileId,
       }),
     }
   )