feat: Introduce @automaker/prompts package for AI prompt templates

Changes:
- Added a new package, @automaker/prompts, containing AI prompt templates for enhancing user-written task descriptions.
- Implemented four enhancement modes: improve, technical, simplify, and acceptance, each with corresponding system prompts and examples.
- Updated relevant packages to utilize the new prompts package, ensuring backward compatibility with existing imports.
- Enhanced documentation to include usage examples and integration details for the new prompts.

Benefits:
✅ Streamlined AI prompt management across the codebase
✅ Improved clarity and usability for AI-powered features
✅ Comprehensive documentation for developers

All tests passing.

apps/ui/src/components/ui/description-image-dropzone.tsx

@@ -4,14 +4,7 @@ import { cn } from "@/lib/utils";
 import { ImageIcon, X, Loader2 } from "lucide-react";
 import { Textarea } from "@/components/ui/textarea";
 import { getElectronAPI } from "@/lib/electron";
-import { useAppStore } from "@/store/app-store";
-
-export interface FeatureImagePath {
-  id: string;
-  path: string; // Path to the temp file
-  filename: string;
-  mimeType: string;
-}
+import { useAppStore, type FeatureImagePath } from "@/store/app-store";
 
 // Map to store preview data by image ID (persisted across component re-mounts)
 export type ImagePreviewMap = Map<string, string>;

apps/ui/src/components/views/board-view/shared/model-constants.ts

@@ -1,4 +1,4 @@
-import { AgentModel, ThinkingLevel } from "@/store/app-store";
+import type { AgentModel, ThinkingLevel } from "@/store/app-store";
 import {
   Brain,
   Zap,

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

@@ -1,6 +1,15 @@
 import { create } from "zustand";
 import { persist } from "zustand/middleware";
 import type { Project, TrashedProject } from "@/lib/electron";
+import type {
+  Feature as BaseFeature,
+  FeatureImagePath,
+  AgentModel,
+  PlanningMode,
+  ThinkingLevel,
+  ModelProvider,
+  AIProfile,
+} from '@automaker/types';
 
 export type ViewMode =
   | "welcome"
@@ -238,6 +247,10 @@ export interface ChatSession {
   archived: boolean;
 }
 
+// Re-export for backward compatibility
+export type { FeatureImagePath, AgentModel, PlanningMode, ThinkingLevel, ModelProvider, AIProfile };
+
+// UI-specific: base64-encoded images (not in shared types)
 export interface FeatureImage {
   id: string;
   data: string; // base64 encoded
@@ -246,68 +259,22 @@ export interface FeatureImage {
   size: number;
 }
 
-export interface FeatureImagePath {
-  id: string;
-  path: string; // Path to the temp file
-  filename: string;
-  mimeType: string;
-}
+// Available models for feature execution (alias for consistency)
+export type ClaudeModel = AgentModel;
 
-// Available models for feature execution
-export type ClaudeModel = "opus" | "sonnet" | "haiku";
-export type AgentModel = ClaudeModel;
-
-// Model provider type
-export type ModelProvider = "claude";
-
-// Thinking level (budget_tokens) options
-export type ThinkingLevel = "none" | "low" | "medium" | "high" | "ultrathink";
-
-// Planning mode for feature specifications
-export type PlanningMode = 'skip' | 'lite' | 'spec' | 'full';
-
-// AI Provider Profile - user-defined presets for model configurations
-export interface AIProfile {
-  id: string;
-  name: string;
-  description: string;
-  model: AgentModel;
-  thinkingLevel: ThinkingLevel;
-  provider: ModelProvider;
-  isBuiltIn: boolean; // Built-in profiles cannot be deleted
-  icon?: string; // Optional icon name from lucide
-}
-
-export interface Feature {
-  id: string;
-  title?: string;
-  titleGenerating?: boolean;
-  category: string;
-  description: string;
-  steps: string[];
+// UI-specific Feature extension with UI-only fields and stricter types
+export interface Feature extends Omit<BaseFeature, 'steps' | 'imagePaths' | 'status'> {
+  steps: string[]; // Required in UI (not optional)
   status:
     | "backlog"
     | "in_progress"
     | "waiting_approval"
     | "verified"
     | "completed";
-  images?: FeatureImage[];
-  imagePaths?: FeatureImagePath[]; // Paths to temp files for agent context
-  startedAt?: string; // ISO timestamp for when the card moved to in_progress
-  skipTests?: boolean; // When true, skip TDD approach and require manual verification
-  summary?: string; // Summary of what was done/modified by the agent
-  model?: AgentModel; // Model to use for this feature (defaults to opus)
-  thinkingLevel?: ThinkingLevel; // Thinking level for extended thinking (defaults to none)
-  error?: string; // Error message if the agent errored during processing
-  priority?: number; // Priority: 1 = high, 2 = medium, 3 = low
-  dependencies?: string[]; // Array of feature IDs this feature depends on
-  // Branch info - worktree path is derived at runtime from branchName
-  branchName?: string; // Name of the feature branch (undefined = use current worktree)
-  justFinishedAt?: string; // ISO timestamp when agent just finished and moved to waiting_approval (shows badge for 2 minutes)
-  planningMode?: PlanningMode; // Planning mode for this feature
-  planSpec?: PlanSpec; // Generated spec/plan data
-  requirePlanApproval?: boolean; // Whether to pause and require manual approval before implementation
-  prUrl?: string; // Pull request URL when a PR has been created for this feature
+  images?: FeatureImage[]; // UI-specific base64 images
+  imagePaths?: FeatureImagePath[]; // Stricter type than base (no string | union)
+  justFinishedAt?: string; // UI-specific: ISO timestamp when agent just finished
+  prUrl?: string; // UI-specific: Pull request URL
 }
 
 // Parsed task from spec (for spec and full planning modes)