Add comprehensive video support to galleries

This commit implements full video upload, storage, streaming, and playback functionality
for the PicPeak photo sharing platform, allowing users to upload and view videos alongside
photos in galleries.

Backend Changes:
- Added video processing dependencies (fluent-ffmpeg, @ffmpeg-installer/ffmpeg)
- Created videoProcessor.js service for video metadata extraction and thumbnail generation
- Updated photoProcessor.js to handle both images and videos
- Modified adminPhotos.js to accept video files with 500MB size limit
- Enhanced gallery.js with HTTP range request support for video streaming
- Expanded fileSecurityUtils.js with video MIME types and magic number validation
- Added database migration for video support columns (media_type, duration, codecs, dimensions)

Frontend Changes:
- Updated TypeScript types to include video metadata fields
- Created VideoPlayer.tsx component with custom controls
- Modified PhotoUpload.tsx to accept video files (.mp4, .webm, .mov, .avi)
- Updated UserPhotoUpload.tsx for guest video uploads
- Enhanced PhotoGrid.tsx with video badges and duration display
- Modified PhotoLightbox.tsx to conditionally render VideoPlayer for videos

Database Schema:
- Added media_type column ('image' | 'video')
- Added mime_type, duration, video_codec, audio_codec columns
- Added width and height columns for media dimensions
- Migrated existing photos to media_type 'image'

Features:
- Video thumbnail generation from video frames
- Streaming support with range requests for efficient playback
- Video duration display on thumbnails
- Play button indicators on video items
- Full-featured video player with playback controls
- Support for MP4, WebM, MOV, and AVI formats

backend/migrations/core/047_add_video_support.js

@@ -0,0 +1,109 @@
+const { addColumnIfNotExists } = require('../helpers');
+
+/**
+ * Migration: Add video support to photos table
+ * - Adds columns for video metadata (media_type, duration, codecs, dimensions)
+ * - Updates existing photos to have media_type 'image'
+ */
+
+exports.up = async function(knex) {
+  console.log('Running migration: 042_add_video_support');
+
+  // Add media_type column (image or video)
+  await addColumnIfNotExists(knex, 'photos', 'media_type', (table) => {
+    table.string('media_type').defaultTo('image');
+  });
+
+  // Add mime_type column if not exists
+  await addColumnIfNotExists(knex, 'photos', 'mime_type', (table) => {
+    table.string('mime_type');
+  });
+
+  // Add duration column (for videos, in seconds)
+  await addColumnIfNotExists(knex, 'photos', 'duration', (table) => {
+    table.integer('duration');
+  });
+
+  // Add video codec information
+  await addColumnIfNotExists(knex, 'photos', 'video_codec', (table) => {
+    table.string('video_codec');
+  });
+
+  // Add audio codec information
+  await addColumnIfNotExists(knex, 'photos', 'audio_codec', (table) => {
+    table.string('audio_codec');
+  });
+
+  // Add width dimension
+  await addColumnIfNotExists(knex, 'photos', 'width', (table) => {
+    table.integer('width');
+  });
+
+  // Add height dimension
+  await addColumnIfNotExists(knex, 'photos', 'height', (table) => {
+    table.integer('height');
+  });
+
+  // Update existing photos to have media_type 'image' if not set
+  const hasMediaType = await knex.schema.hasColumn('photos', 'media_type');
+  if (hasMediaType) {
+    await knex('photos')
+      .whereNull('media_type')
+      .orWhere('media_type', '')
+      .update({ media_type: 'image' });
+    console.log('Updated existing photos to have media_type "image"');
+  }
+
+  console.log('Migration 042_add_video_support completed');
+};
+
+exports.down = async function(knex) {
+  console.log('Rolling back migration: 042_add_video_support');
+
+  // Remove video support columns
+  const hasMediaType = await knex.schema.hasColumn('photos', 'media_type');
+  if (hasMediaType) {
+    await knex.schema.alterTable('photos', (table) => {
+      table.dropColumn('media_type');
+    });
+  }
+
+  const hasDuration = await knex.schema.hasColumn('photos', 'duration');
+  if (hasDuration) {
+    await knex.schema.alterTable('photos', (table) => {
+      table.dropColumn('duration');
+    });
+  }
+
+  const hasVideoCodec = await knex.schema.hasColumn('photos', 'video_codec');
+  if (hasVideoCodec) {
+    await knex.schema.alterTable('photos', (table) => {
+      table.dropColumn('video_codec');
+    });
+  }
+
+  const hasAudioCodec = await knex.schema.hasColumn('photos', 'audio_codec');
+  if (hasAudioCodec) {
+    await knex.schema.alterTable('photos', (table) => {
+      table.dropColumn('audio_codec');
+    });
+  }
+
+  const hasWidth = await knex.schema.hasColumn('photos', 'width');
+  if (hasWidth) {
+    await knex.schema.alterTable('photos', (table) => {
+      table.dropColumn('width');
+    });
+  }
+
+  const hasHeight = await knex.schema.hasColumn('photos', 'height');
+  if (hasHeight) {
+    await knex.schema.alterTable('photos', (table) => {
+      table.dropColumn('height');
+    });
+  }
+
+  // Note: We don't drop mime_type as it may be used by images as well
+
+  console.log('Rollback of 042_add_video_support completed');
+};