new structure for transcription engine

- found problems with mps
- integrated jinja2 templates for rendering (.tex?)
- raw ui & bad structure

utils/prompts/prompt_manager.py

@@ -0,0 +1,78 @@
+from __future__ import annotations
+
+import os
+from jinja2 import Environment, FileSystemLoader, StrictUndefined
+
+
+class PromptManager:
+    """
+    Self-written class for Jinja2 templates especially for summarization.
+
+    Supports:
+    - md
+    - latex
+
+    Usage examples:
+    ```
+    from prompts.prompt_manager import PromptManager
+
+    pm = PromptManager("notecast/prompts")
+
+    markdown_text = pm.render(
+        "markdown_default_prompt.md.j2",
+        language="Russian",
+        title="Calculus - Lecture 1",
+        transcription=raw_transcription_text
+    )
+
+    latex_text = pm.render(
+        "latex_default_prompt.j2",
+        language="Russian",
+        title="Calculus - Lecture 1",
+        transcription=raw_transcription_text
+    )
+    ```
+    """
+
+    def __init__(self, templates_dir: str) -> None:
+        if not os.path.isdir(templates_dir):
+            raise NotADirectoryError(f"Templates directory not found: {templates_dir}")
+
+        self.templates_dir = templates_dir
+
+        self.env = Environment(
+            loader=FileSystemLoader(self.templates_dir),
+            autoescape=False,
+            trim_blocks=True,
+            lstrip_blocks=True,
+            undefined=StrictUndefined
+        )
+
+    def list_templates(self) -> list[str]:
+        templates = []
+        for file in os.listdir(self.templates_dir):
+            if file.endswith(".j2"):
+                templates.append(file)
+        return templates
+
+    def load(self, template_name: str):
+        try:
+            return self.env.get_template(template_name)
+        except Exception as e:
+            raise RuntimeError(f"Failed to load template '{template_name}': {e}")
+
+    def render(
+        self,
+        template_name: str,
+        *,
+        language: str,
+        title: str,
+        transcription: str
+    ) -> str:
+        template = self.load(template_name)
+
+        return template.render(
+            language=language,
+            title=title,
+            transcription=transcription
+        )