feat(recipes): delegate CivitAI-image re-import to companion browser extension

Recipes imported from CivitAI image URLs can contain 0 LoRAs: the backend
only sees the REST image API + EXIF, while the complete generation data
lives in the image page's internal trpc payload (see
docs/recipe-civitai-image-no-metadata.md). When the companion
lm-civitai-extension is installed with a valid license, re-import (single
and bulk) of CivitAI-image-sourced recipes is now delegated to the
extension via DOM CustomEvents; the extension scrapes the image page with
the user's session and calls back into the reimport endpoint with the
full metadata payload. Without the extension (or with an invalid license)
the native path runs unchanged.

- POST /api/lm/recipe/{id}/reimport accepts optional payload params
  (image_url/name/resources/gen_params/base_model/tags); the payload path
  reuses the import-remote engine with reimport semantics (user-edit
  carryover, delete-after-save), and malformed/failed payloads fall back
  to the legacy URL import. Response gains loras_count.
- The endpoint also accepts GET: the extension is GET-only by convention
  (documented in AGENTS.md).
- New static/js/utils/extensionReimportBridge.js (probeExtension /
  delegateReimport / getCivitaiImageInfo) wired into RecipeContextMenu
  and BulkManager with silent native fallback.
- i18n: toast.recipes.reimportingViaExtension added and translated in
  all 9 locales.

static/js/managers/BulkManager.js

@@ -10,6 +10,7 @@ import { createBaseModelPicker, inferBaseModelsFromFilepaths } from '../componen
 import { getPriorityTagSuggestions } from '../utils/priorityTagHelpers.js';
 import { eventManager } from '../utils/EventManager.js';
 import { translate } from '../utils/i18nHelpers.js';
+import { probeExtension, delegateReimport, getCivitaiImageInfo } from '../utils/extensionReimportBridge.js';
 import { getNsfwLevelSelector } from '../components/shared/NsfwLevelSelector.js';
 
 export class BulkManager {
@@ -857,17 +858,74 @@ export class BulkManager {
             `Re-importing recipe 1/${total}...`
         );
 
+        // Partition the selection: recipes sourced from a CivitAI image page
+        // can be delegated to the companion browser extension (which scrapes
+        // the full page metadata); everything else uses the native endpoint.
+        const delegatable = [];
+        const nativeFilePaths = [];
+        for (const filePath of filePaths) {
+            const recipeItem = recipeMap.get(filePath);
+            const civitaiImage = getCivitaiImageInfo(recipeItem?.source_path);
+            if (civitaiImage && recipeItem?.id) {
+                delegatable.push({
+                    filePath,
+                    recipeId: recipeItem.id,
+                    imageId: civitaiImage.imageId,
+                    imageUrl: civitaiImage.imageUrl,
+                    title: recipeItem.title || '',
+                });
+            } else {
+                nativeFilePaths.push(filePath);
+            }
+        }
+
+        // Probe once; on any probe/delegate failure the delegatable recipes
+        // fall back to the native sequential loop below.
+        if (delegatable.length > 0) {
+            try {
+                const probe = await probeExtension();
+                if (probe?.supported && probe?.licenseValid) {
+                    const batchResult = await delegateReimport(
+                        delegatable.map(({ recipeId, imageId, imageUrl, title }) => ({
+                            recipeId, imageId, imageUrl, title,
+                        })),
+                        {
+                            onProgress: (progress) => {
+                                progressUI.updateProgress(
+                                    Math.floor(((progress.current || 0) / total) * 100),
+                                    progress.title || '',
+                                    translate('toast.recipes.reimportingViaExtension', {
+                                        current: progress.current || 0,
+                                        total,
+                                    })
+                                );
+                            },
+                        }
+                    );
+                    completed += batchResult.completed;
+                    failed += batchResult.failed;
+                } else {
+                    nativeFilePaths.push(...delegatable.map(entry => entry.filePath));
+                }
+            } catch (error) {
+                console.warn('[reimportSelectedRecipes] extension delegation failed, using native path:', error);
+                nativeFilePaths.push(...delegatable.map(entry => entry.filePath));
+            }
+        }
+
         try {
-            for (let i = 0; i < filePaths.length; i++) {
-                const filePath = filePaths[i];
+            const processedBeforeNative = completed + failed;
+            for (let i = 0; i < nativeFilePaths.length; i++) {
+                const filePath = nativeFilePaths[i];
                 const recipeItem = recipeMap.get(filePath);
                 const recipeId = recipeItem?.id;
                 const recipeName = recipeItem?.title || recipeId || 'Unknown';
+                const processed = processedBeforeNative + i;
 
                 progressUI.updateProgress(
-                    Math.floor((i / total) * 100),
+                    Math.floor((processed / total) * 100),
                     recipeName,
-                    `Re-importing recipe ${Math.min(i + 1, total)}/${total}...`
+                    `Re-importing recipe ${Math.min(processed + 1, total)}/${total}...`
                 );
 
                 if (!recipeId) {