make concepts library work with Web UI

This PR makes it possible to include a Hugging Face concepts library
<style-or-subject-trigger> in the WebUI prompt. The metadata seems
to be correctly handled.

ldm/generate.py

@@ -436,6 +436,9 @@ class Generate:
             self.sampler_name = sampler_name
             self._set_sampler()
 
+        # apply the concepts library to the prompt
+        prompt = self.concept_lib().replace_concepts_with_triggers(prompt, lambda concepts: self.load_concepts(concepts))
+
         # bit of a hack to change the cached sampler's karras threshold to
         # whatever the user asked for
         if karras_max is not None and isinstance(self.sampler,KSampler):

ldm/invoke/CLI.py

@@ -352,8 +352,6 @@ def main_loop(gen, opt):
                 last_results.append([path, seed])
 
             if operation == 'generate':
-                # load any <embeddings> from the SD concepts library
-                opt.prompt = gen.concept_lib().replace_concepts_with_triggers(opt.prompt, lambda concepts: gen.load_concepts(concepts))
                 catch_ctrl_c = infile is None # if running interactively, we catch keyboard interrupts
                 opt.last_operation='generate'
                 try: