ui : shared model display primitives (#29644)

* ui : shared model display primitives

Extract ModelCapabilityIcons (canonical Tools/Reasoning/Vision/Video/Audio
order) out of ModelId and reuse it there, add the shared DialogConfirmDownload
for destructive download actions, the discover org avatar with dark-mode
inversion and the thin download progress bar, and rework ModelId badges to take
thinking/tool-use support directly.

Assisted-by: pi:GLM-5.3-Flash

* ui : remember hub avatars that failed to load

Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash

* ui : render shared model row hints as native titles

Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash

* ui : fix badge guard for draft sidecars, keep parameter precision

hasBadges now counts draft sidecar badges, so a sidecar-only model still
renders. Billions keep one decimal for hub counts and stay bare for whole
values. Avatar failures track the org instead of the instance, and the
download progress bar no longer pulses while determinate.

Assisted-by: pi:zai-org/GLM-5.3-Flash