Add README screenshots; fix Hub reload and slow GraphRAG answers

.github/dependabot.yml

@@ -22,6 +22,10 @@ updates:
     directories: ["/backend", "/deploy"]
     schedule:
       interval: monthly
+    ignore:
+      # Caddy 2.11 cancels proxied requests after 60 s; see deploy/lb.Dockerfile
+      - dependency-name: caddy
+        versions: [">= 2.11"]
 
   - package-ecosystem: docker-compose
     directories: ["/", "/deploy"]

CHANGELOG.md

@@ -16,7 +16,10 @@ Notable changes to Knowledge Hubs. The format follows [Keep a Changelog](https:/
 - Backend dependencies upgraded to current releases, including FastAPI 0.142 (Starlette 1.7), Pydantic 2.13, sentence-transformers 6, NumPy 2 and Celery 5.6.
 - JWTs are handled by PyJWT instead of python-jose, and passwords by `bcrypt` directly instead of passlib. Existing password hashes and sessions keep working.
 - Tokens without an expiry are refused.
-- Docker base images: Caddy 2.11, Node 22.
+- Docker base images: Caddy 2.10, Node 22.
+
+### Fixed
+- Reloading a page whose path is also an API path (such as `/knowledge`) made the app show "Failed to load knowledge": the browser reused the cached page for the app's data request. The web server now sends `Vary: Accept`.
 
 ### Removed
 - Unused dependencies: `openai`, `tiktoken`, `aiofiles`, `python-jose`, `passlib`.

README.md

@@ -5,6 +5,21 @@
 
 A **local-first knowledge base** for teams. It turns meeting notes, retros, decision logs, documents, web pages and transcripts into structured knowledge (decisions, risks, lessons, how-tos) that you can review, search, track over time and question in plain English.
 
+![GraphRAG answering "What do we use for domain events now, and why did it change?" with citations, and flagging the superseded Kafka decision](docs/images/graphrag.png)
+
+<table>
+  <tr>
+    <td width="50%"><img src="docs/images/decisions.png" alt="Decision log: each decision's status, tags, and the older decision it supersedes or amends"></td>
+    <td width="50%"><img src="docs/images/review.png" alt="Review queue: extracted items waiting to be accepted, edited or rejected"></td>
+  </tr>
+  <tr>
+    <td align="center"><b>Decision log</b>: status, history and what replaced what</td>
+    <td align="center"><b>Review queue</b>: nothing reaches GraphRAG until someone accepts it</td>
+  </tr>
+</table>
+
+<sub>Screenshots use fictional demo data.</sub>
+
 - **Runs on your machine.** FastAPI backend, Angular frontend, **ArcadeDB** as the only data store, and local AI: one of three LLMs run by [Ollama](docs/local-models.md) plus sentence-transformers embeddings. There are no cloud AI providers.
 - **Personal and group spaces.** Everyone has a private space and can create or join groups that share one. A switcher in the nav picks where you're working.
 - **Decisions have a history.** A decision can supersede, reverse or amend an older one, and risks can be mitigated or actually happen. The app tracks each item's status and shows how it evolved.

deploy/Caddyfile

@@ -22,6 +22,10 @@
 
 	# Some API prefixes are also app routes (/knowledge, /connectors, /groups,
 	# /admin/users): a browser page load (GET accepting HTML) gets the app.
+	# Vary: Accept keeps the browser from answering the app's own API request
+	# for such a path with the page it cached on a reload, and vice versa.
+	@shared path /knowledge* /connectors* /groups* /admin*
+	header @shared Vary Accept
 	@page {
 		method GET
 		header Accept *text/html*

deploy/lb.Dockerfile

@@ -9,6 +9,8 @@ RUN npm ci
 COPY frontend/ ./
 RUN npx ng build --configuration production
 
-FROM caddy:2.11-alpine
+# 2.10, not 2.11: Caddy 2.11 cancels proxied requests after 60 s (499), which
+# breaks GraphRAG answers that take longer on a CPU-only machine
+FROM caddy:2.10-alpine
 COPY --from=frontend /src/dist/frontend/browser /srv
 COPY deploy/Caddyfile /etc/caddy/Caddyfile