refactor: consolidate prompt functionality into support-prompt module

- Move code action prompts from core/prompts to shared/support-prompt
- Migrate enhance prompt functionality from modes to support-prompt
- Add UI for managing code action prompts in PromptsView
- Update types and interfaces for better prompt management

src/shared/support-prompt.ts

@@ -0,0 +1,118 @@
+// Separate enhance prompt type and definition
+export type EnhanceConfig = {
+	prompt: string
+}
+
+export const enhance: EnhanceConfig = {
+	prompt: "Generate an enhanced version of this prompt (reply with only the enhanced prompt - no conversation, explanations, lead-in, bullet points, placeholders, or surrounding quotes):",
+} as const
+
+// Completely separate enhance prompt handling
+export const enhancePrompt = {
+	default: enhance.prompt,
+	get: (customPrompts: Record<string, any> | undefined): string => {
+		return customPrompts?.enhance ?? enhance.prompt
+	},
+} as const
+
+// Code action prompts
+type PromptParams = Record<string, string | any[]>
+
+const generateDiagnosticText = (diagnostics?: any[]) => {
+	if (!diagnostics?.length) return ""
+	return `\nCurrent problems detected:\n${diagnostics
+		.map((d) => `- [${d.source || "Error"}] ${d.message}${d.code ? ` (${d.code})` : ""}`)
+		.join("\n")}`
+}
+
+export const createPrompt = (template: string, params: PromptParams): string => {
+	let result = template
+	for (const [key, value] of Object.entries(params)) {
+		if (key === "diagnostics") {
+			result = result.replaceAll("${diagnosticText}", generateDiagnosticText(value as any[]))
+		} else {
+			result = result.replaceAll(`\${${key}}`, value as string)
+		}
+	}
+
+	// Replace any remaining user_input placeholders with empty string
+	result = result.replaceAll("${userInput}", "")
+
+	return result
+}
+
+const EXPLAIN_TEMPLATE = `
+Explain the following code from file path @/\${filePath}:
+\${userInput}
+
+\`\`\`
+\${selectedText}
+\`\`\`
+
+Please provide a clear and concise explanation of what this code does, including:
+1. The purpose and functionality
+2. Key components and their interactions
+3. Important patterns or techniques used
+`
+
+const FIX_TEMPLATE = `
+Fix any issues in the following code from file path @/\${filePath}
+\${diagnosticText}
+\${userInput}
+
+\`\`\`
+\${selectedText}
+\`\`\`
+
+Please:
+1. Address all detected problems listed above (if any)
+2. Identify any other potential bugs or issues
+3. Provide corrected code
+4. Explain what was fixed and why
+`
+
+const IMPROVE_TEMPLATE = `
+Improve the following code from file path @/\${filePath}:
+\${userInput}
+
+\`\`\`
+\${selectedText}
+\`\`\`
+
+Please suggest improvements for:
+1. Code readability and maintainability
+2. Performance optimization
+3. Best practices and patterns
+4. Error handling and edge cases
+
+Provide the improved code along with explanations for each enhancement.
+`
+
+// Get template based on prompt type
+const defaultTemplates = {
+	EXPLAIN: EXPLAIN_TEMPLATE,
+	FIX: FIX_TEMPLATE,
+	IMPROVE: IMPROVE_TEMPLATE,
+} as const
+
+type CodeActionType = keyof typeof defaultTemplates
+
+export const codeActionPrompt = {
+	default: defaultTemplates,
+	get: (customPrompts: Record<string, any> | undefined, type: CodeActionType): string => {
+		return customPrompts?.[type] ?? defaultTemplates[type]
+	},
+	create: (type: CodeActionType, params: PromptParams, customPrompts?: Record<string, any>): string => {
+		const template = codeActionPrompt.get(customPrompts, type)
+		return createPrompt(template, params)
+	},
+} as const
+
+export type { CodeActionType }
+
+// User-friendly labels for code action types
+export const codeActionLabels: Record<CodeActionType, string> = {
+	FIX: "Fix Issues",
+	EXPLAIN: "Explain Code",
+	IMPROVE: "Improve Code",
+} as const