Milestone 1.

app/routes/notes.py

@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+from flask import Blueprint, abort, redirect, render_template, request, url_for
+
+from app.services.notes_fs import create_note, list_notes, load_note_by_id, update_note_body
+
+bp = Blueprint("notes", __name__, url_prefix="/notes")
+
+
+@bp.get("/")
+def notes_index():
+    notes = list_notes()
+    return render_template("notes/list.html", notes=notes)
+
+
+@bp.get("/new")
+def notes_new():
+    return render_template("notes/new.html")
+
+
+@bp.post("/")
+def notes_create():
+    title = (request.form.get("title") or "").strip()
+    body = (request.form.get("body") or "").strip()
+    tags_raw = (request.form.get("tags") or "").strip()
+    tags = [t.strip() for t in tags_raw.split(",") if t.strip()] if tags_raw else []
+
+    if not title:
+        return render_template("notes/new.html", error="Title is required", title=title, body=body, tags_raw=tags_raw), 400
+
+    note = create_note(title=title, body=body, tags=tags)
+    return redirect(url_for("notes.notes_view", note_id=note.id))
+
+
+@bp.get("/<note_id>")
+def notes_view(note_id: str):
+    note = load_note_by_id(note_id)
+    if not note:
+        abort(404)
+    # M2 will render Markdown; for now show raw body and metadata
+    return render_template("notes/view.html", note=note)
+
+
+@bp.post("/<note_id>/body")
+def notes_update_body(note_id: str):
+    new_body = request.form.get("body") or ""
+    note = update_note_body(note_id, new_body)
+    if not note:
+        abort(404)
+    return redirect(url_for("notes.notes_view", note_id=note.id))