fix: normalize search matching for recommended models and LoRA picker (#4615)

Recommended models matching the query were filtered from HF results but the Recommended section was hidden during search, causing them to vanish entirely.

- Show filtered recommended models during search by introducing `filteredRecommendedIds`
- Switch `recommendedSet` to use filtered IDs when searching so dedup against HF results is correct
- Hide empty "Hugging Face" label when recommended matches cover the query
- Add `normalizeForSearch` helper to strip separators (spaces, hyphens, underscores, dots) so queries like "llama 3" match "Llama-3.2-1B" and "qwen 2.5" matches "Qwen2.5-7B" in both the recommended model filter and the LoRA adapter filter