feat(feedback): Add content improvement feedback system

Frontend (frontend/app.js):

- Add textarea for improvement feedback

- Add submit button with loading state

- Handle API response and display improved content

Backend (backend/copywriter.py):

- Add improve_copy() method using Cohere API

- Integrate retry mechanism for API calls

Backend (backend/main.py):

- Add /improve-content POST endpoint

- Implement error handling and return improved content with metadata

Testing:

- Verified feedback submission flow

- Confirmed improved content generation

- Tested error scenarios and loading states

backend/config.py

@@ -52,12 +52,12 @@ CONTENT_TYPES = [
     "newsletter"
 ]
 
-# Tone options - simplified to match the core style
+# Tone options - specifically matching Adriana James' communication style
 TONE_OPTIONS = [
-    "direct",
     "empowering",
-    "confident",
-    "practical"
+    "assertive",
+    "inspirational",
+    "direct"
 ]
 
 # Content length options
@@ -67,19 +67,22 @@ LENGTH_OPTIONS = [
     "long",    # > 300 words
 ]
 
-# Default brand style guidelines
+# Default brand style guidelines - fixed to match Adriana James' distinct communication style
 DEFAULT_BRAND_STYLE = {
-    "tone": ["direct", "empowering", "confident", "practical"],
-    "voice_characteristics": ["clear", "authoritative", "steady", "rhythmic"],
-    "writing_patterns": ["direct commands", "personal pronouns", "repetitive rhythms"],
-    "taboo_words": ["cheap", "discount", "bargain", "failure", "impossible", "difficult"],
+    "tone": ["empowering", "assertive", "inspirational", "direct"],
+    "voice_characteristics": ["clear", "confident", "conversational", "teaching"],
+    "writing_patterns": ["direct commands", "personal pronouns", "repetitive rhythms", "embedded commands", "cause-effect statements"],
+    "taboo_words": ["cheap", "discount", "bargain", "failure", "impossible", "difficult", "might", "try", "consider"],
     "preferred_terms": {
         "problems": "challenges",
         "try": "take action",
         "difficult": "ready for growth",
         "failure": "learning opportunity",
         "hope": "know",
-        "maybe": "will"
+        "maybe": "will",
+        "might help you": "you can do this",
+        "consider doing this": "decide now to change your thinking",
+        "this could work": "this works because"
     }
 }