Rename to stealergram, add pyproject.toml, purge em-dashes

- Rename project to stealergram throughout
- Add pyproject.toml (replaces requirements.txt split, folds pytest.ini)
- Replace all em-dashes with hyphens across all source files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/routes/auth.py

@@ -1,9 +1,9 @@
 """
-web/routes/auth.py — Login, logout, token refresh.
+web/routes/auth.py - Login, logout, token refresh.
 
-POST /login    — form submit; sets access_token + refresh_token cookies
-POST /logout   — revokes refresh token, clears cookies
-POST /refresh  — exchanges refresh_token cookie for a new access_token
+POST /login - form submit; sets access_token + refresh_token cookies
+POST /logout - revokes refresh token, clears cookies
+POST /refresh - exchanges refresh_token cookie for a new access_token
 """
 
 from fastapi import APIRouter, Form, HTTPException, Request, Response, status

web/routes/config_routes.py

@@ -1,5 +1,5 @@
 """
-web/routes/config_routes.py — Keyword groups and channel list management.
+web/routes/config_routes.py - Keyword groups and channel list management.
 
 GET  /config/keywords → render groups editor
 PUT  /config/keywords → validate + save groups, reload scorer

web/routes/dashboard.py

@@ -1,5 +1,5 @@
 """
-web/routes/dashboard.py — Dashboard views and SSE live stream.
+web/routes/dashboard.py - Dashboard views and SSE live stream.
 
 GET  /             → redirect to /dashboard
 GET  /dashboard    → overview: all groups, stats, live hit feed

web/routes/users.py

@@ -1,5 +1,5 @@
 """
-web/routes/users.py — User CRUD (superadmin only).
+web/routes/users.py - User CRUD (superadmin only).
 
 GET    /users           → list all users
 POST   /users           → create a new user