Profile name inputs accepted uppercase letters (e.g. 'MyConfig') but
hermes-agent's backend validation only allows [a-z0-9_-], causing
'Invalid profile name' errors when creating or renaming profiles.
Changes:
- ProfileCreateModal: filter and lowercase input on @input
- ProfileRenameModal: same fix + change from v-model to :value + @input
- en.ts: update placeholder text to clarify 'lowercase letters'
- zh.ts: update placeholder text to clarify '小写字母'
Before: input 'MyConfig' was sent unchanged → backend error
After: input 'MyConfig' is normalized to 'myconfig' → success
Co-authored-by: HJW <hujingwen@hermes.ai>
