Merge everyday-helpers and fix structure

ideas/everyday-helpers/smart-price-tracker.md

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+# Intelligent Price Watcher
+
+## Problem
+You want to buy stuff, but the prices fluctuate constantly. You don't want to check every day.
+
+## Instructions
+1. **Monitoring:** User pastes a product URL (Amazon, eBay, etc.).
+2. **Scraping:** The agent periodically checks the price for that product.
+3. **Alerting:** Only pings you when the price hits your target *or* drops by a significant percentage (e.g., 20%).
+4. **Validation:** Agent checks if the seller is reputable (using basic rating scores available on the page).
+
+## Goal
+Stop overpaying and stop manual price searching.