feat: use llamaindex everywhere (#525)

* feat: use llamaindex for transcript final title too

* refactor: removed llm backend, replaced with one single class+llamaindex

* refactor: self-review

* fix: typing

* fix: tests

* refactor: extract clean_title and add tests

* test: fix

* test: remove ensure_casing/nltk

* fix: tiny mistake

server/reflector/utils/text.py

@@ -0,0 +1,33 @@
+def clean_title(title: str) -> str:
+    """
+    Clean and format a title string for consistent capitalization.
+
+    Rules:
+    - Strip surrounding quotes (single or double)
+    - Capitalize the first word
+    - Capitalize words longer than 3 characters
+    - Keep words with 3 or fewer characters lowercase (except first word)
+
+    Args:
+        title: The title string to clean
+
+    Returns:
+        The cleaned title with consistent capitalization
+
+    Examples:
+        >>> clean_title("hello world")
+        "Hello World"
+        >>> clean_title("meeting with the team")
+        "Meeting With the Team"
+        >>> clean_title("'Title with quotes'")
+        "Title With Quotes"
+    """
+    title = title.strip("\"'")
+    words = title.split()
+    if words:
+        words = [
+            word.capitalize() if i == 0 or len(word) > 3 else word.lower()
+            for i, word in enumerate(words)
+        ]
+        title = " ".join(words)
+    return title