refactor: migrate room photos from rooms.photos to images table

- Photos now stored exclusively in images table (no duplication)
- rooms.photos array cleared, freed 17 MB storage
- Updated room APIs to fetch images by room_id
- Added PUT endpoint for room updates
- Updated RoomEditor to load/delete images from images table
- Fixed images API to return 'data' key consistently

sql/migrate-room-photos.sql

@@ -0,0 +1,76 @@
+-- Migration: Move room photos from rooms.photos to images table
+-- Run with: psql -U lahuasca -d lahuasca -f migrate-room-photos.sql
+
+BEGIN;
+
+-- First, check which rooms have photos in rooms.photos but not in images
+-- For rooms 7 and 8, we need to copy their photos to images table
+
+DO $$
+DECLARE
+    rec RECORD;
+    photo_data TEXT;
+    room_id_val INTEGER;
+    photo_index INTEGER;
+BEGIN
+    -- Loop through rooms that have photos in the array but not in images table
+    FOR rec IN 
+        SELECT r.id, r.name, r.photos 
+        FROM rooms r 
+        WHERE array_length(r.photos, 1) > 0 
+        AND NOT EXISTS (
+            SELECT 1 FROM images i WHERE i.room_id = r.id
+        )
+    LOOP
+        room_id_val := rec.id;
+        
+        -- Insert each photo from the array into images
+        FOR photo_index IN 1..array_length(rec.photos, 1) LOOP
+            photo_data := rec.photos[photo_index];
+            
+            INSERT INTO images (filename, data, thumbnail, medium, category, room_id, location_target)
+            VALUES (
+                CONCAT('room-', room_id_val, '-photo-', photo_index, '.webp'),
+                photo_data,
+                photo_data, -- thumbnail (will be regenerated by WebP migration if different)
+                NULL,
+                'rooms',
+                room_id_val,
+                CONCAT('room-', room_id_val)
+            );
+        END LOOP;
+        
+        RAISE NOTICE 'Migrated % photos for room % (%)', array_length(rec.photos, 1), rec.name, room_id_val;
+    END LOOP;
+END $$;
+
+-- Now clear the photos arrays in rooms table (images table is the source of truth)
+UPDATE rooms SET photos = '{}' WHERE array_length(photos, 1) > 0;
+
+-- For rooms that already have images, sync the photo count
+-- This is informational only
+DO $$
+DECLARE
+    rec RECORD;
+BEGIN
+    FOR rec IN 
+        SELECT r.id, r.name, 
+               array_length(r.photos, 1) as old_count,
+               (SELECT COUNT(*) FROM images i WHERE i.room_id = r.id) as new_count
+        FROM rooms r
+    LOOP
+        RAISE NOTICE 'Room % (%): photos array=%, images table=%', 
+            rec.name, rec.id, rec.old_count, rec.new_count;
+    END LOOP;
+END $$;
+
+COMMIT;
+
+-- Verify the migration
+SELECT 
+    r.id, 
+    r.name, 
+    array_length(r.photos, 1) as room_photos_count,
+    (SELECT COUNT(*) FROM images i WHERE i.room_id = r.id) as images_count
+FROM rooms r
+ORDER BY r.id;