Bernhard Müller a651ec946c feat(community): add metering data upload UI with preview and validation ... - Add frontend upload page with file selection, drag-and-drop, and preview - Add preview endpoint (POST /api/community/metering-data/preview/xlsx) - Validate FEED_IN only for PRODUCER, CONSUMPTION only for CONSUMER metering points - Optimize deduplication with bulk query (fix N+1 problem) - Eliminate duplicate DB query in validateRecords - Add 4 new tests for data type validation - Add navigation entry for admin users		2026-07-23 07:07:52 +02:00
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dashboard-layout	feat(community): add metering data upload UI with preview and validation	2026-07-23 07:07:52 +02:00
header	fix(frontend): replace alert() with ToastService, remove console.*, fix UI bugs	2026-07-22 09:25:50 +02:00