feat(models): show Civitai model/version ids in model modal, always-on hash/id search

- Model modal hash footnote now shows Civitai model id and version id
  (right-aligned, quick-copy buttons); hidden for non-Civitai models
- Hash/id exact search (sha256/autov2/autov3/civitai ids) is now always
  on: the search-options "hash" toggle is removed and the search_hash
  query param is silently ignored for API compatibility
- Footnote render condition relaxed so autov3-only and id-only models
  still show the line
- i18n: 4 new keys translated in all 9 locales; filters.hash key removed

locales/en.json

@@ -251,7 +251,6 @@
         "modelname": "Model Name",
         "tags": "Tags",
         "creator": "Creator",
-        "hash": "Hash",
         "title": "Recipe Title",
         "loraName": "LoRA Filename",
         "loraModel": "LoRA Model Name",
@@ -1837,6 +1836,8 @@
         "sendToWorkflow": "Send to ComfyUI",
         "sendToWorkflowText": "Send to ComfyUI",
         "copyHash": "Copy hash",
+        "copyCivitaiId": "Copy Civitai ID",
+        "civitaiIdCopied": "Civitai ID copied to clipboard",
         "deleteModelWithShortcut": "Delete model (Del)"
       },
       "openFileLocation": {
@@ -1855,6 +1856,8 @@
         "baseModel": "Base Model",
         "size": "Size",
         "hashes": "Hashes",
+        "civitaiModelId": "Model ID",
+        "civitaiVersionId": "Version ID",
         "unknown": "Unknown",
         "usageTips": "Usage Tips",
         "additionalNotes": "Additional Notes",