feat(tg-fitness-bot): /feedback command, feedback SQLite table

Users can send /feedback <text> to record feedback. Stored in a new
feedback table with user_id, text, created_at. Updated /start help text.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bot.py

@@ -16,7 +16,7 @@ from telegram.ext import (
     filters,
 )
 
-from db import init_db, save_workout, get_workouts, get_workout_count, get_stats_sql, delete_workout
+from db import init_db, save_workout, get_workouts, get_workout_count, get_stats_sql, delete_workout, save_feedback
 from parser import parse_workout, format_workout
 
 load_dotenv()
@@ -93,7 +93,8 @@ async def cmd_start(update: Update, context: ContextTypes.DEFAULT_TYPE):
         "/history \u2014 view recent workouts\n"
         "/stats \u2014 quick summary\n"
         "/delete <id> \u2014 delete a workout\n"
-        "/export \u2014 export all data as JSON"
+        "/export \u2014 export all data as JSON\n"
+        "/feedback <text> \u2014 send feedback"
     )
 
     if WEBAPP_URL:
@@ -197,6 +198,21 @@ async def cmd_export(update: Update, context: ContextTypes.DEFAULT_TYPE):
     )
 
 
+async def cmd_feedback(update: Update, context: ContextTypes.DEFAULT_TYPE):
+    user_id = update.effective_user.id
+    text = " ".join(context.args) if context.args else ""
+
+    if not text:
+        await update.message.reply_text(
+            "Usage: /feedback <your feedback>",
+            parse_mode=ParseMode.HTML,
+        )
+        return
+
+    save_feedback(user_id, text)
+    await update.message.reply_text("\U0001f4dd Feedback saved, thanks!")
+
+
 # ── Message handler (workout parsing) ───────────────────────────────────────
 
 
@@ -290,6 +306,7 @@ def main():
     app.add_handler(CommandHandler("stats", cmd_stats))
     app.add_handler(CommandHandler("delete", cmd_delete))
     app.add_handler(CommandHandler("export", cmd_export))
+    app.add_handler(CommandHandler("feedback", cmd_feedback))
 
     # Handle all text messages (including forwarded ones)
     app.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, handle_message))

db.py

@@ -60,6 +60,13 @@ def init_db():
 
             CREATE INDEX IF NOT EXISTS idx_workouts_user
                 ON workouts(user_id, timestamp);
+
+            CREATE TABLE IF NOT EXISTS feedback (
+                id          INTEGER PRIMARY KEY AUTOINCREMENT,
+                user_id     INTEGER NOT NULL,
+                text        TEXT    NOT NULL,
+                created_at  TEXT    NOT NULL DEFAULT (datetime('now'))
+            );
         """)
 
         # Migrations
@@ -246,3 +253,23 @@ def export_workouts(user_id: int) -> list[dict]:
         """, (user_id,)).fetchall()
 
         return [dict(r) for r in rows]
+
+
+def save_feedback(user_id: int, text: str) -> int:
+    """Save user feedback. Returns the feedback id."""
+    with get_db() as conn:
+        cur = conn.execute(
+            "INSERT INTO feedback (user_id, text) VALUES (?, ?)",
+            (user_id, text),
+        )
+        return cur.lastrowid
+
+
+def get_feedback(limit: int = 50) -> list[dict]:
+    """Get all feedback, newest first."""
+    with get_db() as conn:
+        rows = conn.execute(
+            "SELECT id, user_id, text, created_at FROM feedback ORDER BY created_at DESC LIMIT ?",
+            (limit,),
+        ).fetchall()
+        return [dict(r) for r in rows]