feat: sync with upstream — v1.2.0, in-app updates, Projects, modules

Brings the public tree back in line with the development repo after several
weeks of drift caused by a stale publish include list.

New:
- In-app update path: GET /update/check compares the checkout against
  origin/main and POST /update/apply runs `ncp upgrade` detached (pull,
  rebuild, restart). The sidebar shows the version, checks on click, and
  offers an "update available" pill.
- Projects: a project workspace groups chats and RAG documents, with
  per-project instructions and document retrieval scoped to the active
  project. Replaces the standalone Documents page.
- modules/: auto-discovered feature plugins (mail, network) with their
  frontend counterparts and tests.
- Memory curation runs in-process (synapse/memory/curator.py) on the chat
  model when a conversation goes idle. The separate memory service on :8001
  is gone, along with the launcher lines that started it.

Also: the KDE theme, panel and Promethean terminal assets, the full test
suite, and VERSION 1.2.0.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

modules/registry.py

@@ -0,0 +1,37 @@
+"""Auto-discovers backend modules under modules/ — any subpackage with a
+router.py exposing `router` (an APIRouter) is mounted automatically. Drop a
+new module folder in and it's picked up on next start; nothing here needs
+editing.
+
+A missing router.py just means the folder isn't a module (skipped quietly).
+An import error *inside* an existing router.py is a real bug and is left to
+raise — silently swallowing it would hide broken modules instead of
+surfacing them at startup.
+"""
+from __future__ import annotations
+
+import importlib
+import pkgutil
+from pathlib import Path
+from typing import List
+
+from fastapi import APIRouter
+
+_MODULES_DIR = Path(__file__).resolve().parent
+
+
+def _discover() -> List[APIRouter]:
+    routers = []
+    for info in sorted(pkgutil.iter_modules([str(_MODULES_DIR)]), key=lambda m: m.name):
+        if not info.ispkg:
+            continue
+        if not (_MODULES_DIR / info.name / "router.py").exists():
+            continue
+        mod = importlib.import_module(f"modules.{info.name}.router")
+        router = getattr(mod, "router", None)
+        if isinstance(router, APIRouter):
+            routers.append(router)
+    return routers
+
+
+ROUTERS = _discover()