fix(links): let CivitAI and HuggingFace links coexist (#1094)

A model could have CivitAI metadata and a HuggingFace link at the same time,
but only one of the two "View on ..." entries ever rendered, because both the
model modal and the card globe asked the `from_civitai` provenance flag which
source to show. `set_hf_url` wrote `false` and a CivitAI refresh wrote `true`,
so whichever ran last erased the other: linking HF hid "View on CivitAI" even
though the civitai payload was still in the sidecar, and (on the card) a later
refresh pointed the single globe icon back at CivitAI, hiding the HF entry.

Decide the links from the data itself instead:

- `set_hf_url` no longer touches `from_civitai`; it records where the metadata
  came from, and HF provenance is already tracked by `hf_url`.
- Add `hasCivitaiSource(civitai)` in the shared card/modal utils and gate the
  modal's CivitAI link, the card globe (title, enabled state, click target,
  new `data-has_civitai`) and the context-menu `civitai` action on actual
  CivitAI data (`modelId` / `model_id` / `id`). A dual-source model now shows
  both links, and a CivitAI-only model with no `hf_url` stays as before.
- Agent HF enrichment (`PostProcessor.is_hf_model`) keyed off
  `not from_civitai`, which stopped being a synonym for "has an HF source" once
  both sources can coexist (and already broke after a CivitAI refresh flipped
  the flag back to true). Key it off `hf_url` directly; the post-processor
  tests move to that discriminator and gain a dual-source case.

Regression tests: the set-hf-url handler preserves civitai + `from_civitai`
and no longer forces the flag false, the modal renders both links (including
with `from_civitai: false`), and the card globe targets/opens the right source
and is disabled when neither is available.

Backend: 2749 passed. Frontend: 1098 JS + 91 Vue tests passed.

static/js/components/shared/ModelCard.js

@@ -1,6 +1,7 @@
 import { showToast, openCivitai, openHuggingFace, copyToClipboard, copyLoraSyntax, sendLoraToWorkflow, sendEmbeddingToWorkflow, openExampleImagesFolder, buildLoraSyntax, sendModelPathToWorkflow } from '../../utils/uiHelpers.js';
 import { state, getCurrentPageState } from '../../state/index.js';
 import { showModelModal } from './ModelModal.js';
+import { hasCivitaiSource } from './utils.js';
 import { bulkManager } from '../../managers/BulkManager.js';
 import { modalManager } from '../../managers/ModalManager.js';
 import { NSFW_LEVELS, getBaseModelAbbreviation, getSubTypeAbbreviation, getMatureBlurThreshold, MODEL_SUBTYPE_DISPLAY_NAMES, MODEL_CARD_DRAG_MIME_TYPE } from '../../utils/constants.js';
@@ -63,7 +64,10 @@ function handleModelCardEvent_internal(event, modelType) {
 
     if (event.target.closest('.fa-globe')) {
         event.stopPropagation();
-        if (card.dataset.from_civitai === 'true') {
+        // CivitAI wins when the model actually has CivitAI data; otherwise fall
+        // back to HuggingFace. Relying on `from_civitai` here made the two
+        // sources mutually exclusive whenever one of them was (re)linked (#1094).
+        if (card.dataset.has_civitai === 'true') {
             openCivitai(card.dataset.filepath);
         } else if (card.dataset.hf_url) {
             openHuggingFace(card.dataset.hf_url);
@@ -478,6 +482,9 @@ export function createModelCard(model, modelType) {
     card.dataset.modified = model.modified;
     card.dataset.file_size = model.file_size;
     card.dataset.from_civitai = model.from_civitai;
+    // Independent of `from_civitai`: a model can have both CivitAI data and an
+    // HF link, and the card globe must keep pointing at CivitAI when it does.
+    card.dataset.has_civitai = hasCivitaiSource(model.civitai) ? 'true' : 'false';
     card.dataset.usage_count = String(model.usage_count);
     card.dataset.notes = model.notes || '';
     card.dataset.base_model = model.base_model || 'Unknown';
@@ -600,12 +607,13 @@ export function createModelCard(model, modelType) {
     const favoriteTitle = isFavorite ?
         translate('modelCard.actions.removeFromFavorites', {}, 'Remove from favorites') :
         translate('modelCard.actions.addToFavorites', {}, 'Add to favorites');
-    const globeTitle = model.from_civitai ?
+    const hasCivitai = hasCivitaiSource(model.civitai);
+    const globeTitle = hasCivitai ?
         translate('modelCard.actions.viewOnCivitai', {}, 'View on Civitai') :
         model.hf_url ?
             translate('modelCard.actions.viewOnHuggingFace', {}, 'View on Hugging Face') :
             translate('modelCard.actions.notAvailableFromCivitai', {}, 'Not available from Civitai');
-    const globeEnabled = model.from_civitai || !!model.hf_url;
+    const globeEnabled = hasCivitai || !!model.hf_url;
     let sendTitle;
     let copyTitle;
     if (modelType === MODEL_TYPES.LORA) {