fix: return structured JSON from AI routes so insights actually populate

[Harshit-Mishra2212]

📌 Description

Both /api/insights and /api/ai returned data in a shape that utils.ts could never use, causing the AI insights panel to always silently render empty despite the API calls succeeding.

/api/insights returned response.content directly - the raw Anthropic SDK content block array ([{ type: 'text', text: '...' }]) instead of the actual text. utils.ts then accessed metricsResult.insights?.keyTrends, areasOfConcern, recommendations, and achievements on it, none of which exist on a content block array, so all four fields were always undefined and fell back to [].

/api/ai correctly extracted textContent.text but returned a raw markdown string. utils.ts then accessed programResult.insights?.riskFactors, strategicRecommendations, and successStories on it - fields that don't exist on a plain string, so those were always undefined too.

Result: combineAndPrioritize([], []) ran every time, the insights object was always full of empty arrays, and the AI Analysis panel rendered nothing.

Not related to a specific issue.

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✅ Changes

• Fix

• /api/insights now prompts Claude to respond with a specific JSON structure matching what utils.ts expects: { keyTrends, areasOfConcern, recommendations, achievements }

• /api/ai now prompts Claude to respond with a specific JSON structure matching what utils.ts expects: { riskFactors, strategicRecommendations, successStories }

• Both routes now correctly extract textContent.text from the Anthropic response and parse it as JSON before returning

• Both routes now throw meaningful errors if Claude returns non-JSON instead of silently failing

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🔍 Additional Notes

No breaking changes to the response envelope shape - both routes still return { insights, success }. Only the content of insights changes from undefined/raw array to the structured object utils.ts already expected.

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Checklist

• I have tested this code
• I have added necessary documentation
• I have linked relevant issue(s)
• I followed the code style of the project
• I reviewed my own code

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