b11536: ui: Models Manager Follow-up Improvements (#30228)

common : read a GGUF's trained context from its metadata common_get_gguf_n_ctx_train opens only the file's metadata (no_alloc, like common_get_decision_type) and reads .context_length, so a caller can learn the trained context without loading the model. It accepts both u32 and u64 values and returns 0 when the file is missing, unreadable, invalid, or reports no context length. Assisted-by: pi:zai-org/GLM-5.3-Flash server : report the trained context in the models listing update_caps already resolves the model file offline to read its modalities, so it now reads the trained context from the same GGUF metadata, and GET /models reports it as context_length when it is known. A router listing then carries the context without any Hub request, which lets the UI sort and filter by it offline. Assisted-by: pi:zai-org/GLM-5.3-Flash ui : take the trained context from the models listing The router now reports context_length per model, so the option mapping fills contextLength from it and the manager reads it before the Hub record. The Context column, the context sort and the context filter then work with the Hugging Face Hub API turned off. A browser suite guards the sort and the search, the Hub-cache driven context filter and the re-sort when details arrive after the sort was clicked. Assisted-by: pi:zai-org/GLM-5.3-Flash ui : mark favorite models with a heart A favorited model shows a rose heart in the selector even before its row is hovered, and the crossed heart takes its place on hover, so unfavoriting stays one hover away. The manager table marks its favorited rows with the same heart after the badges and capabilities. Assisted-by: pi:zai-org/GLM-5.3-Flash fix: UI text nit fix: UI nits fix: Favorite models grouping in models table feat: Remove sorting from Status column in Models Table server: read the GGUF metadata once per model Read the decision type and the trained context in a single GGUF open, accept only a UINT32 context length like the model loader, and reset n_ctx_train with the other caps so a failed refresh drops it. fix: Post-review fixes Co-authored-by: Pascal [email protected]