backend/app/models/post.rb

@@ -2,6 +2,8 @@ class Post < ApplicationRecord
   require 'mini_magick'
   require 'stringio'
 
+  class RemoteThumbnailFetchFailed < StandardError; end
+
   ORIGINAL_CREATED_INVALID_MESSAGE = 'オリジナルの作成日時の形式が不正です．'.freeze
   ORIGINAL_CREATED_MINUTE_PRECISION_MESSAGE =
       'オリジナルの作成日時は分単位で入力してください．'.freeze
@@ -12,7 +14,9 @@ class Post < ApplicationRecord
   def self.resized_thumbnail_attachment(upload)
     upload.rewind
     image = MiniMagick::Image.read(upload.read)
-    image.resize '180x180'
+    image.resize '180x180^'
+    image.gravity 'Center'
+    image.extent '180x180'
     image.format 'jpg'
 
     { io: StringIO.new(image.to_blob),
@@ -125,7 +129,11 @@ class Post < ApplicationRecord
           '%d:%02d' % [min, s]
         end
 
-    remainder_ms.positive? ? "#{ base }.#{ remainder_ms.to_s.rjust(3, '0') }" : base
+    if remainder_ms.positive?
+      "#{ base }.#{ remainder_ms.to_s.rjust(3, '0') }"
+    else
+      base
+    end
   end
 
   def snapshot_parent_post_ids = parents.order(:id).pluck(:id)
@@ -147,8 +155,33 @@ class Post < ApplicationRecord
     thumbnail.attach(self.class.resized_thumbnail_attachment(StringIO.new(thumbnail.download)))
   end
 
+  def attach_thumbnail_from_url! raw_url
+    response = Preview::ThumbnailFetcher.fetch_image_response(raw_url)
+    thumbnail.attach(
+        io: StringIO.new(response.body),
+        filename: remote_thumbnail_filename(response.url),
+        content_type: response.content_type)
+    resized_thumbnail!
+  rescue Preview::UrlSafety::UnsafeUrl,
+         Preview::ThumbnailFetcher::GenerationFailed,
+         Preview::HttpFetcher::FetchFailed,
+         Preview::HttpFetcher::FetchTimeout,
+         Preview::HttpFetcher::ResponseTooLarge,
+         MiniMagick::Error => e
+    raise RemoteThumbnailFetchFailed, e.message
+  end
+
   private
 
+  def remote_thumbnail_filename url
+    filename = File.basename(URI.parse(url).path.to_s)
+    return filename if filename.present? && filename != '/'
+
+    'thumbnail'
+  rescue URI::InvalidURIError
+    'thumbnail'
+  end
+
   def validate_original_created_range
     f = parse_original_created_value(:original_created_from)
     b = parse_original_created_value(:original_created_before)

backend/app/services/post_creator.rb

@@ -1,9 +1,12 @@
 class PostCreator
   class VideoMsParseError < ArgumentError; end
 
+  attr_reader :field_warnings
+
   def initialize actor:, attributes:
     @actor = actor
     @attributes = attributes.symbolize_keys
+    @field_warnings = { }
   end
 
   def create!
@@ -13,8 +16,7 @@ class PostCreator
                     uploaded_user: @actor,
                     original_created_from: @attributes[:original_created_from].presence,
                     original_created_before: @attributes[:original_created_before].presence)
-    thumbnail = @attributes[:thumbnail]
-    post.thumbnail.attach(Post.resized_thumbnail_attachment(thumbnail)) if thumbnail.present?
+    attach_thumbnail!(post)
 
     ApplicationRecord.transaction do
       post.save!
@@ -34,6 +36,21 @@ class PostCreator
 
   private
 
+  def attach_thumbnail! post
+    thumbnail = @attributes[:thumbnail]
+    if thumbnail.present?
+      post.thumbnail.attach(Post.resized_thumbnail_attachment(thumbnail))
+      return
+    end
+
+    thumbnail_base = post.thumbnail_base
+    return if thumbnail_base.blank?
+
+    post.attach_thumbnail_from_url!(thumbnail_base)
+  rescue Post::RemoteThumbnailFetchFailed => e
+    @field_warnings[:thumbnail_base] = [e.message]
+  end
+
   def tag_names = @attributes[:tags].to_s.split
 
   def parent_post_ids

backend/app/services/post_import_runner.rb

@@ -36,8 +36,13 @@ class PostImportRunner
 
     attributes['tags'] = preview[:attributes]['tags']
     attributes['url'] = row['url']
-    post = PostCreator.new(actor: @actor, attributes:).create!
-    { source_row: row['source_row'], status: 'created', post: PostRepr.base(post) }
+    creator = PostCreator.new(actor: @actor, attributes:)
+    post = creator.create!
+    result = { source_row: row['source_row'], status: 'created', post: PostRepr.base(post) }
+    if creator.field_warnings.present?
+      result[:field_warnings] = creator.field_warnings
+    end
+    result
   rescue ActiveRecord::RecordInvalid => e
     existing_post = existing_post_for_race(row, e.record)
     if existing_post

backend/app/services/preview/thumbnail_fetcher.rb

@@ -25,6 +25,22 @@ module Preview
       fetch_image!(metadata[:image_url])
     end
 
+    def self.fetch_image_response(raw_url)
+      uri, = UrlSafety.validate(raw_url)
+      response = HttpFetcher.fetch(uri.to_s)
+      unless allowed_image_content_type?(response.content_type)
+        raise GenerationFailed, 'サムネール画像が見つかりませんでした．'
+      end
+
+      response
+    rescue HttpFetcher::FetchTimeout
+      raise
+    rescue HttpFetcher::ResponseTooLarge
+      raise
+    rescue HttpFetcher::FetchFailed
+      raise GenerationFailed, 'サムネール画像を取得できませんでした．'
+    end
+
     def self.title(raw_url)
       uri, = UrlSafety.validate(raw_url)
       HtmlMetadataExtractor.extract(
@@ -45,18 +61,7 @@ module Preview
     end
 
     def self.fetch_image!(url)
-      response = HttpFetcher.fetch(url)
-      unless allowed_image_content_type?(response.content_type)
-        raise GenerationFailed, 'サムネール画像が見つかりませんでした．'
-      end
-
-      response.body
-    rescue HttpFetcher::FetchTimeout
-      raise
-    rescue HttpFetcher::ResponseTooLarge
-      raise
-    rescue HttpFetcher::FetchFailed
-      raise GenerationFailed, 'サムネール画像を取得できませんでした．'
+      fetch_image_response(url).body
     end
 
     def self.niconico_thumbnail_url(uri)
@@ -70,16 +75,20 @@ module Preview
 
       xml.at_xpath('//thumbnail_url')&.text&.strip.presence
     rescue HttpFetcher::FetchFailed, HttpFetcher::FetchTimeout => e
-      Rails.logger.info("preview_niconico_getthumbinfo_fallback #{ { url: uri.to_s,
+      payload = {
+          url: uri.to_s,
           video_id:,
           error: e.class.name,
-                                                                     message: e.message }.to_json }")
+          message: e.message }
+      Rails.logger.info("preview_niconico_getthumbinfo_fallback #{ payload.to_json }")
       nil
     rescue Nokogiri::XML::SyntaxError => e
-      Rails.logger.info("preview_niconico_getthumbinfo_fallback #{ { url: uri.to_s,
+      payload = {
+          url: uri.to_s,
           video_id:,
           error: e.class.name,
-                                                                     message: e.message }.to_json }")
+          message: e.message }
+      Rails.logger.info("preview_niconico_getthumbinfo_fallback #{ payload.to_json }")
       nil
     end
 

backend/app/services/youtube/sync.rb

@@ -1,4 +1,3 @@
-require 'open-uri'
 require 'set'
 require 'time'
 
@@ -127,12 +126,12 @@ module Youtube
       return if post.thumbnail.attached?
       return if thumbnail_url.blank?
 
-      post.thumbnail.attach(
-          io:           URI.open(thumbnail_url),
-          filename:     File.basename(URI.parse(thumbnail_url).path),
-          content_type: 'image/jpeg')
-
-      post.resized_thumbnail!
+      post.attach_thumbnail_from_url!(thumbnail_url)
+    rescue Post::RemoteThumbnailFetchFailed => e
+      Rails.logger.info("youtube_sync_thumbnail_fetch_failed #{ { post_id: post.id,
+                                                                  thumbnail_url:,
+                                                                  error: e.class.name,
+                                                                  message: e.message }.to_json }")
     end
 
     def youtube_url_regexp id

backend/lib/tasks/sync_nico.rake

@@ -70,11 +70,17 @@ namespace :nico do
         unless post.thumbnail.attached?
           thumbnail_base = fetch_thumbnail.(post.url) rescue nil
           if thumbnail_base.present?
-            post.thumbnail.attach(
-                io:           URI.open(thumbnail_base),
-                filename:     File.basename(URI.parse(thumbnail_base).path),
-                content_type: 'image/jpeg')
             attrs[:thumbnail_base] = thumbnail_base
+            begin
+              post.attach_thumbnail_from_url!(thumbnail_base)
+            rescue Post::RemoteThumbnailFetchFailed => e
+              payload = {
+                  post_id: post.id,
+                  thumbnail_base:,
+                  error: e.class.name,
+                  message: e.message }
+              Rails.logger.info("nico_sync_thumbnail_fetch_failed #{ payload.to_json }")
+            end
           end
         end
 
@@ -82,7 +88,6 @@ namespace :nico do
         post_changed = post.changed?
         if post_changed
           post.save!
-          post.resized_thumbnail! if post.thumbnail.attached?
         end
       else
         post_created = true
@@ -91,13 +96,18 @@ namespace :nico do
         post = Post.new(title:, url:, thumbnail_base:, uploaded_user: nil,
                         original_created_from:, original_created_before:)
         if thumbnail_base.present?
-          post.thumbnail.attach(
-              io:           URI.open(thumbnail_base),
-              filename:     File.basename(URI.parse(thumbnail_base).path),
-              content_type: 'image/jpeg')
+          begin
+            post.attach_thumbnail_from_url!(thumbnail_base)
+          rescue Post::RemoteThumbnailFetchFailed => e
+            payload = {
+                post_id: nil,
+                thumbnail_base:,
+                error: e.class.name,
+                message: e.message }
+            Rails.logger.info("nico_sync_thumbnail_fetch_failed #{ payload.to_json }")
+          end
         end
         post.save!
-        post.resized_thumbnail!
         sync_post_tags!(post, [Tag.tagme.id, Tag.bot.id, Tag.niconico.id, Tag.video.id])
       end
 

backend/spec/models/post_spec.rb

@@ -1,4 +1,5 @@
 require 'rails_helper'
+require 'tempfile'
 
 RSpec.describe Post, type: :model do
   before do
@@ -65,4 +66,133 @@ RSpec.describe Post, type: :model do
       expect(post.errors.details.fetch(:url)).to include(error: :taken, value: post.url)
     end
   end
+
+  describe 'thumbnail processing' do
+    def image_blob(width:, height:, background:, draw: nil)
+      Tempfile.create(['post-thumbnail', '.png']) do |file|
+        MiniMagick::Tool::Convert.new do |convert|
+          convert.size "#{ width }x#{ height }"
+          convert.xc background
+          draw&.call(convert)
+          convert << file.path
+        end
+        File.binread(file.path)
+      end
+    end
+
+    def upload_for(blob)
+      StringIO.new(blob).tap(&:rewind)
+    end
+
+    def read_image(attachment)
+      blob =
+          attachment.is_a?(Hash) ? attachment.fetch(:io).read : attachment.download
+      MiniMagick::Image.read(blob)
+    end
+
+    def colour_at(image, x, y)
+      image.get_pixels.fetch(y).fetch(x)
+    end
+
+    def expect_green(pixel)
+      expect(pixel[1]).to be > pixel[0] + 40
+      expect(pixel[1]).to be > pixel[2] + 40
+    end
+
+    def expect_red(pixel)
+      expect(pixel[0]).to be > pixel[1] + 40
+      expect(pixel[0]).to be > pixel[2] + 40
+    end
+
+    def expect_blue(pixel)
+      expect(pixel[2]).to be > pixel[0] + 40
+      expect(pixel[2]).to be > pixel[1] + 40
+    end
+
+    describe '.resized_thumbnail_attachment' do
+      it 'centre-crops a wide image to 180x180 without distorting it' do
+        blob = image_blob(
+            width: 360,
+            height: 180,
+            background: 'red',
+            draw: -> convert {
+              convert.fill 'green'
+              convert.draw 'rectangle 90,0 269,179'
+            })
+
+        resized = described_class.resized_thumbnail_attachment(upload_for(blob))
+        image = read_image(resized)
+
+        expect(image.dimensions).to eq([180, 180])
+        expect_green(colour_at(image, 0, 90))
+        expect_green(colour_at(image, 90, 90))
+        expect_green(colour_at(image, 179, 90))
+      end
+
+      it 'centre-crops a tall image to 180x180 without distorting it' do
+        blob = image_blob(
+            width: 180,
+            height: 360,
+            background: 'red',
+            draw: -> convert {
+              convert.fill 'green'
+              convert.draw 'rectangle 0,90 179,269'
+            })
+
+        resized = described_class.resized_thumbnail_attachment(upload_for(blob))
+        image = read_image(resized)
+
+        expect(image.dimensions).to eq([180, 180])
+        expect_green(colour_at(image, 90, 0))
+        expect_green(colour_at(image, 90, 90))
+        expect_green(colour_at(image, 90, 179))
+      end
+
+      it 'keeps a square image square without distortion' do
+        blob = image_blob(
+            width: 180,
+            height: 180,
+            background: 'red',
+            draw: -> convert {
+              convert.fill 'blue'
+              convert.draw 'rectangle 90,0 179,179'
+            })
+
+        resized = described_class.resized_thumbnail_attachment(upload_for(blob))
+        image = read_image(resized)
+
+        expect(image.dimensions).to eq([180, 180])
+        expect_red(colour_at(image, 20, 90))
+        expect_blue(colour_at(image, 160, 90))
+      end
+    end
+
+    describe '#attach_thumbnail_from_url!' do
+      it 'attaches a fetched remote image through the common resize path' do
+        blob = image_blob(
+            width: 240,
+            height: 180,
+            background: 'red',
+            draw: -> convert {
+              convert.fill 'green'
+              convert.draw 'rectangle 30,0 209,179'
+            })
+        response = Preview::HttpFetcher::Response.new(
+            blob,
+            'image/png',
+            'https://example.com/thumb.png')
+        allow(Preview::ThumbnailFetcher).to receive(:fetch_image_response)
+            .with('https://example.com/thumb.png')
+            .and_return(response)
+
+        post = described_class.create!(title: 'title', url: 'https://example.com/post')
+
+        post.attach_thumbnail_from_url!('https://example.com/thumb.png')
+
+        expect(post.thumbnail).to be_attached
+        image = read_image(post.thumbnail)
+        expect(image.dimensions).to eq([180, 180])
+      end
+    end
+  end
 end

backend/spec/services/post_creator_spec.rb

@@ -0,0 +1,82 @@
+require 'rails_helper'
+require 'base64'
+
+RSpec.describe PostCreator do
+  let(:actor) { create(:user, :member) }
+
+  def real_thumbnail_upload
+    gif = Base64.decode64('R0lGODdhAQABAIABAP///wAAACwAAAAAAQABAAACAkQBADs=')
+
+    Rack::Test::UploadedFile.new(
+        StringIO.new(gif),
+        'image/gif',
+        original_filename: 'thumbnail.gif')
+  end
+
+  before do
+    allow(Tag).to receive(:normalise_tags!).and_return({ tags: [], sections: {} })
+    allow(TagVersioning).to receive(:record_tag_snapshots!)
+    allow(Tag).to receive(:expand_parent_tags).and_return([])
+    allow(PostVersionRecorder).to receive(:record!)
+  end
+
+  it 'prefers an explicit upload over thumbnail_base' do
+    allow(Post).to receive(:resized_thumbnail_attachment).and_return(
+        io: StringIO.new('upload'),
+        filename: 'resized_thumbnail.jpg',
+        content_type: 'image/jpeg')
+    expect_any_instance_of(Post).not_to receive(:attach_thumbnail_from_url!)
+
+    post = described_class.new(
+        actor:,
+        attributes: {
+          title: 'title',
+          url: 'https://example.com/post',
+          thumbnail: real_thumbnail_upload,
+          thumbnail_base: 'https://example.com/thumb.jpg',
+          tags: '' }).create!
+
+    expect(post.thumbnail).to be_attached
+    expect(post.thumbnail_base).to eq('https://example.com/thumb.jpg')
+  end
+
+  it 'uses the common remote thumbnail attach path when thumbnail_base is given' do
+    expect_any_instance_of(Post).to receive(:attach_thumbnail_from_url!)
+        .with('https://example.com/thumb.jpg') do |post, _url|
+      post.thumbnail.attach(
+          io: StringIO.new('thumbnail'),
+          filename: 'thumbnail.jpg',
+          content_type: 'image/jpeg')
+    end
+
+    post = described_class.new(
+        actor:,
+        attributes: {
+          title: 'title',
+          url: 'https://example.com/post',
+          thumbnail_base: 'https://example.com/thumb.jpg',
+          tags: '' }).create!
+
+    expect(post.thumbnail_base).to eq('https://example.com/thumb.jpg')
+    expect(post.thumbnail).to be_attached
+  end
+
+  it 'keeps creating the post and records a warning when remote thumbnail fetch fails' do
+    allow_any_instance_of(Post).to receive(:attach_thumbnail_from_url!)
+        .and_raise(Post::RemoteThumbnailFetchFailed, 'サムネール画像を取得できませんでした．')
+    creator = described_class.new(
+        actor:,
+        attributes: {
+          title: 'title',
+          url: 'https://example.com/post',
+          thumbnail_base: 'https://example.com/thumb.jpg',
+          tags: '' })
+
+    post = creator.create!
+
+    expect(post.thumbnail_base).to eq('https://example.com/thumb.jpg')
+    expect(post.thumbnail).not_to be_attached
+    expect(creator.field_warnings).to eq(
+        thumbnail_base: ['サムネール画像を取得できませんでした．'])
+  end
+end

backend/spec/services/post_import_runner_spec.rb

@@ -130,4 +130,23 @@ RSpec.describe PostImportRunner do
 
     expect(result).to include(status: 'skipped', existing_post_id: existing.id)
   end
+
+  it 'returns thumbnail warnings from PostCreator on a created row' do
+    previewer = instance_double(PostImportPreviewer)
+    allow(PostImportPreviewer).to receive(:new).and_return(previewer)
+    allow(previewer).to receive(:preview_rows).and_return([preview])
+    created_post = create(:post)
+    creator = instance_double(
+        PostCreator,
+        create!: created_post,
+        field_warnings: { thumbnail_base: ['サムネール画像を取得できませんでした．'] })
+    allow(PostCreator).to receive(:new).and_return(creator)
+
+    result = described_class.new(actor:, rows: [row]).run.fetch(:rows).first
+
+    expect(result).to include(
+      status: 'created',
+      field_warnings: { thumbnail_base: ['サムネール画像を取得できませんでした．'] }
+    )
+  end
 end

backend/spec/services/preview/thumbnail_fetcher_spec.rb

@@ -48,4 +48,56 @@ RSpec.describe Preview::ThumbnailFetcher do
       expect(described_class.fetch('https://example.com/page')).to eq('jpeg-bytes')
     end
   end
+
+  describe '.fetch_image_response' do
+    it 'rejects an unsafe input URL before HTTP fetch' do
+      allow(Preview::UrlSafety).to receive(:validate)
+          .and_raise(Preview::UrlSafety::UnsafeUrl, '安全でない接続先は使用できません．')
+      expect(Preview::HttpFetcher).not_to receive(:fetch)
+
+      expect {
+        described_class.fetch_image_response('https://unsafe.example.com/thumb.jpg')
+      }.to raise_error(Preview::UrlSafety::UnsafeUrl, '安全でない接続先は使用できません．')
+    end
+
+    it 'rejects an unsafe redirect target' do
+      allow(Preview::UrlSafety).to receive(:validate)
+          .and_return([URI.parse('https://example.com/thumb.jpg'), ['8.8.8.8']])
+      allow(Preview::HttpFetcher).to receive(:fetch)
+          .with('https://example.com/thumb.jpg')
+          .and_raise(Preview::UrlSafety::UnsafeUrl, '安全でない接続先は使用できません．')
+
+      expect {
+        described_class.fetch_image_response('https://example.com/thumb.jpg')
+      }.to raise_error(Preview::UrlSafety::UnsafeUrl, '安全でない接続先は使用できません．')
+    end
+
+    it 'rejects an oversized image response' do
+      allow(Preview::UrlSafety).to receive(:validate)
+          .and_return([URI.parse('https://example.com/thumb.jpg'), ['8.8.8.8']])
+      allow(Preview::HttpFetcher).to receive(:fetch)
+          .with('https://example.com/thumb.jpg')
+          .and_raise(Preview::HttpFetcher::ResponseTooLarge, 'too large')
+
+      expect {
+        described_class.fetch_image_response('https://example.com/thumb.jpg')
+      }.to raise_error(Preview::HttpFetcher::ResponseTooLarge)
+    end
+
+    it 'rejects a non-image content type' do
+      allow(Preview::UrlSafety).to receive(:validate)
+          .and_return([URI.parse('https://example.com/thumb.jpg'), ['8.8.8.8']])
+      allow(Preview::HttpFetcher).to receive(:fetch)
+          .with('https://example.com/thumb.jpg')
+          .and_return(
+              Preview::HttpFetcher::Response.new(
+                  '<html></html>',
+                  'text/html',
+                  'https://example.com/thumb.jpg'))
+
+      expect {
+        described_class.fetch_image_response('https://example.com/thumb.jpg')
+      }.to raise_error(Preview::ThumbnailFetcher::GenerationFailed)
+    end
+  end
 end

backend/spec/services/youtube/sync_spec.rb

@@ -10,6 +10,21 @@ RSpec.describe Youtube::Sync do
     allow(sync).to receive(:attach_thumbnail_if_needed!)
   end
 
+  describe '#attach_thumbnail_if_needed!' do
+    it 'uses the common remote thumbnail attach path' do
+      post = create(:post, thumbnail_base: nil)
+      allow(sync).to receive(:attach_thumbnail_if_needed!).and_call_original
+
+      expect(post).to receive(:attach_thumbnail_from_url!)
+          .with('https://example.com/thumb.jpg')
+
+      sync.send(
+          :attach_thumbnail_if_needed!,
+          post,
+          'https://example.com/thumb.jpg')
+    end
+  end
+
   describe '#sync!' do
     it 'returns without fetching video details when no video ids are discovered' do
       allow(sync).to receive(:query_terms).and_return([])

backend/spec/tasks/nico_sync_spec.rb

@@ -60,6 +60,25 @@ RSpec.describe "nico:sync" do
     expect(active_tag_names).to include("bot操作")
   end
 
+  it '既存 post のサムネール取得に共通 attach 経路を使ふ' do
+    post = Post.create!(
+        title: 'old',
+        url: 'https://www.nicovideo.jp/watch/sm9',
+        uploaded_user: nil)
+    Tag.bot
+    Tag.tagme
+
+    stub_python([{ 'code' => 'sm9', 'title' => 't', 'tags' => [] }])
+    allow(URI).to receive(:open)
+        .and_return(
+            StringIO.new(
+                '<meta name="thumbnail" content="https://example.com/thumb.jpg">'))
+    expect(post).to receive(:attach_thumbnail_from_url!)
+        .with('https://example.com/thumb.jpg')
+
+    run_rake_task('nico:sync')
+  end
+
   it "既存 post にあった古い nico tag は active から外され、履歴として discard される" do
     post = Post.create!(title: "old", url: "https://www.nicovideo.jp/watch/sm9", uploaded_user: nil)
 

frontend/src/lib/postImportRows.ts

@@ -136,6 +136,8 @@ export const mergeImportResults = (
               skipReason: undefined,
               createdPostId: result.post.id,
               existingPostId: undefined,
+              fieldWarnings: result.fieldWarnings ?? row.fieldWarnings,
+              baseWarnings: result.baseWarnings ?? row.baseWarnings,
               importErrors: result.errors }
         case 'skipped':
           return {
@@ -144,6 +146,8 @@ export const mergeImportResults = (
               skipReason: 'existing',
               createdPostId: undefined,
               existingPostId: result.existingPostId,
+              fieldWarnings: result.fieldWarnings ?? row.fieldWarnings,
+              baseWarnings: result.baseWarnings ?? row.baseWarnings,
               importErrors: result.errors }
         case 'failed':
           return {
@@ -152,6 +156,8 @@ export const mergeImportResults = (
               skipReason: undefined,
               createdPostId: undefined,
               existingPostId: undefined,
+              fieldWarnings: result.fieldWarnings ?? row.fieldWarnings,
+              baseWarnings: result.baseWarnings ?? row.baseWarnings,
               importErrors: result.errors }
         }
     })

frontend/src/lib/postImportTypes.ts

@@ -41,15 +41,21 @@ export type PostImportResultRow =
 	sourceRow: number
 	status:    'created'
 	post:      { id: number }
+	fieldWarnings?: Record<string, string[]>
+	baseWarnings?:  string[]
 	errors?:   Record<string, string[]> }
     | {
 	sourceRow:      number
 	status:         'skipped'
 	existingPostId: number
+	fieldWarnings?: Record<string, string[]>
+	baseWarnings?:  string[]
 	errors?:        Record<string, string[]> }
     | {
 	sourceRow: number
 	status:    'failed'
+	fieldWarnings?: Record<string, string[]>
+	baseWarnings?:  string[]
 	errors?:   Record<string, string[]>
 	recoverable?: boolean }