feat: unified messaging TUI MVP — Synapse + 7 mautrix bridges + Textual TUI + MCP draft staging

One-command local stack: cp .env.example .env && make up. Idempotent
bootstrap renders Synapse + bridge configs from pristine upstream examples,
provisions databases, registrations, double puppeting, and the admin user.
Textual TUI with bridge manager, in-terminal QR login, and drafts panel.
MCP server exposes read tools and a human-gated draft send workflow.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tui/app/vortex_tui/qr.py

@@ -0,0 +1,35 @@
+"""Render QR-ish message payloads as unicode half-block QR codes."""
+
+import qrcode
+
+QR_SCHEMES = ("https://wa.me/", "gmessages://")
+
+
+def looks_like_qr_payload(body: str, sender_is_bridge_bot: bool) -> bool:
+    """Deliberately simple heuristic:
+
+    - message starts with a known pairing scheme (whatsapp / gmessages), or
+    - a bridge-bot message that is a single URL/token: 20-199 chars, no
+      whitespace, and either contains '://' or is alnum-ish (pairing code).
+    """
+    body = body.strip()
+    if body.startswith(QR_SCHEMES):
+        return True
+    if sender_is_bridge_bot and 20 <= len(body) < 200 and not any(c.isspace() for c in body):
+        return "://" in body or body.replace("-", "").replace("_", "").isalnum()
+    return False
+
+
+def render_qr(text: str) -> str:
+    """QR code as text, two matrix rows per output line via half blocks."""
+    qr = qrcode.QRCode(border=1)
+    qr.add_data(text)
+    qr.make(fit=True)
+    matrix = qr.get_matrix()
+    if len(matrix) % 2:
+        matrix.append([False] * len(matrix[0]))
+    chars = {(True, True): "█", (True, False): "▀", (False, True): "▄", (False, False): " "}
+    return "\n".join(
+        "".join(chars[(top[x], bottom[x])] for x in range(len(top)))
+        for top, bottom in zip(matrix[::2], matrix[1::2])
+    )