Add dashboard report snapshots feature with CRUD operations. Implemented new database migrations for dashboard_report_snapshots, including report type handling. Updated backend routes and models to support snapshot retrieval and upsert functionality. Enhanced frontend components to integrate report snapshot management, including UI for daily and end-cycle reports. Added tests for new functionality to ensure reliability.

backend/database/migrations/015_create_dashboard_report_snapshots.sql

@@ -0,0 +1,28 @@
+-- Frozen latest Dashboard IoT-vs-manual report snapshot per cycle + kandang.
+-- Generate again overwrites the same row. No TTL / expires_at.
+
+CREATE TABLE IF NOT EXISTS dashboard_report_snapshots (
+    id SERIAL PRIMARY KEY,
+    cycle_id VARCHAR(255) NOT NULL,
+    kandang_id INTEGER NOT NULL,
+    payload JSONB NOT NULL DEFAULT '{}'::jsonb,
+    up_to_day INTEGER NOT NULL,
+    generated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (cycle_id) REFERENCES cycles(id) ON DELETE CASCADE,
+    FOREIGN KEY (kandang_id) REFERENCES kandangs(id) ON DELETE CASCADE,
+    UNIQUE (cycle_id, kandang_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_dashboard_report_snapshots_cycle_kandang
+    ON dashboard_report_snapshots (cycle_id, kandang_id);
+
+DROP TRIGGER IF EXISTS update_dashboard_report_snapshots_updated_at ON dashboard_report_snapshots;
+CREATE TRIGGER update_dashboard_report_snapshots_updated_at
+    BEFORE UPDATE ON dashboard_report_snapshots
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+COMMENT ON TABLE dashboard_report_snapshots IS
+    'Latest desktop Dashboard daily IoT-vs-manual report snapshot; one row per cycle+kandang, overwritten on Generate';

backend/database/migrations/016_add_report_type_to_dashboard_report_snapshots.sql

@@ -0,0 +1,39 @@
+-- Independent daily vs end-cycle snapshots for the same cycle + kandang.
+
+ALTER TABLE dashboard_report_snapshots
+    ADD COLUMN IF NOT EXISTS report_type VARCHAR(32) NOT NULL DEFAULT 'daily';
+
+DO $$
+DECLARE
+    constraint_name text;
+BEGIN
+    SELECT conname INTO constraint_name
+    FROM pg_constraint
+    WHERE conrelid = 'dashboard_report_snapshots'::regclass
+      AND contype = 'u'
+      AND pg_get_constraintdef(oid) LIKE '%(cycle_id, kandang_id)%'
+      AND pg_get_constraintdef(oid) NOT LIKE '%report_type%';
+    IF constraint_name IS NOT NULL THEN
+        EXECUTE format('ALTER TABLE dashboard_report_snapshots DROP CONSTRAINT IF EXISTS %I', constraint_name);
+    END IF;
+END $$;
+
+ALTER TABLE dashboard_report_snapshots
+    DROP CONSTRAINT IF EXISTS dashboard_report_snapshots_cycle_id_kandang_id_key;
+
+ALTER TABLE dashboard_report_snapshots
+    DROP CONSTRAINT IF EXISTS dashboard_report_snapshots_cycle_kandang_type_key;
+
+ALTER TABLE dashboard_report_snapshots
+    ADD CONSTRAINT dashboard_report_snapshots_cycle_kandang_type_key
+    UNIQUE (cycle_id, kandang_id, report_type);
+
+ALTER TABLE dashboard_report_snapshots
+    DROP CONSTRAINT IF EXISTS dashboard_report_snapshots_report_type_check;
+
+ALTER TABLE dashboard_report_snapshots
+    ADD CONSTRAINT dashboard_report_snapshots_report_type_check
+    CHECK (report_type IN ('daily', 'end_cycle'));
+
+COMMENT ON COLUMN dashboard_report_snapshots.report_type IS
+    'daily or end_cycle; unique with cycle_id + kandang_id so each type keeps its own latest snapshot';