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)

launch_nexus.sh

@@ -1,4 +1,9 @@
 #!/bin/bash
+
+# Loopback by default: the backend REST API is unauthenticated, so
+# binding 0.0.0.0 hands the whole admin+data plane to any host on the LAN.
+# Same knob management/ncp.py uses -- set NEXUS_BIND_HOST=0.0.0.0 to opt in.
+BIND_HOST="${NEXUS_BIND_HOST:-127.0.0.1}"
 PROJECT_ROOT="$(cd "$(dirname "$0")" && pwd)"
 PYTHON="$PROJECT_ROOT/Promethean/bin/python3"
 FRONTEND_DIR="$PROJECT_ROOT/interface/web"
@@ -6,7 +11,6 @@ LOG_DIR="$PROJECT_ROOT/runtime"
 
 mkdir -p "$LOG_DIR"
 
-MEMORY_LOG="$LOG_DIR/memory.log"
 BACKEND_LOG="$LOG_DIR/backend.log"
 FRONTEND_LOG="$LOG_DIR/frontend.log"
 
@@ -29,15 +33,10 @@ _check() {
     fi
 }
 
-# Launch memory + backend together
-MEMORY_PID=$(_start "NEXUS MEMORY SERVICE" "$MEMORY_LOG" "$PROJECT_ROOT" \
-    "$PYTHON" -m uvicorn synapse.memory.service:app --host 0.0.0.0 --port 8001 --reload)
-
 BACKEND_PID=$(_start "NEXUS BACKEND SERVICE" "$BACKEND_LOG" "$PROJECT_ROOT" \
-    "$PYTHON" -m uvicorn synapse.main:sio_app --host 0.0.0.0 --port 8000 --reload)
+    "$PYTHON" -m uvicorn synapse.main:sio_app --host "$BIND_HOST" --port 8000 --reload)
 
 sleep 3
-_check "NEXUS MEMORY SERVICE" "$MEMORY_PID" "$MEMORY_LOG"
 _check "NEXUS BACKEND SERVICE" "$BACKEND_PID" "$BACKEND_LOG"
 
 # Frontend last