Update docs with feedback and resumability features

NITDAA_ARCHITECTURE_DESIGN.md

@@ -7,14 +7,16 @@ Nitdaa is the mobile-friendly MVP sibling to the full HealthExpert enterprise pl
 ## 2. Core Differences from Base HealthExpert
 - **UI/UX**: Transitioned from a 3-pane desktop layout to a single-pane vertical mobile layout.
 - **Admin Constraints**: Admin controls (Kill Switch, DB Purge) are entirely hidden in the HTML to prevent public tampering.
-- **Session Audit**: Uses `nitdaa_sessions.json` and `nitdaa_summary.json` for granular system telemetry rather than database-backed logs.
+- **Session Audit**: Uses `nitdaa_sessions.json` and `nitdaa_summary.json` for granular system telemetry rather than database-backed logs. Features an integrated UI feedback loop that captures user sentiment (thumbs up/down) directly into the telemetry file.
+- **Resumable Event Streaming**: The architecture uses an asynchronous Job ID system (`/api/query/start` and `/api/query/stream`) to survive mobile background disconnections.
+- **Concurrent RAG Isolation**: Vector and Graph retrieval pipelines operate inside a Thread Pool with thread-local database connections, allowing multi-user concurrency without global UI locking.
 
 ## 3. Data Flow
 1. **Startup & Sync**: Flask initializes. `sync_he_data()` runs asynchronously to pull the latest dataset from `Sam-max1/he-data`. If differences are found, it gracefully purges vector/graph databases and rebuilds. Concurrently, it performs a 2-way remote synchronization of logs with `Sam-max1/mat_data`.
 2. **Security & Connection**: Client connections face an immediate Math CAPTCHA. All API calls pass through `Flask-Limiter` and Strict HTTP Content Security Policies.
 3. **Ingestion**: If new files are detected, `process_document_pipeline` splits them into 512-token chunks, vectorizes them into ChromaDB, and extracts graph entities locally using `spaCy`.
-4. **Retrieval**: When a query hits `/api/query`, it triggers Tri-modal Hybrid Retrieval (Vector + BM25 + Graph). 
-5. **Synthesis**: A Cross-Encoder reranks the chunks, and the context is fed into a reasoning-distilled tiny model (e.g., `Jackrong/Qwen3.5-2B-Claude-4.6-Opus-Reasoning-Distilled-GGUF`) running on `llama-cpp-python`.
+4. **Retrieval (Concurrent)**: When a query hits `/api/query/start`, an asynchronous thread pool handles Tri-modal Hybrid Retrieval (Vector + BM25 + Graph) allowing multiple users to fetch context simultaneously.
+5. **Synthesis & Feedback**: A Cross-Encoder reranks the chunks, and the context is fed into the local LLM generation queue. The frontend streams events using Server-Sent Events with offset recovery. Upon completion, users optionally submit ratings securely stored in `nitdaa_summary.json`.
 
 ## 4. Resource Allocation
 Nitdaa is tuned for the HuggingFace Spaces free tier:

NITDAA_HEALTHEXPERT_USER_GUIDE.md

@@ -27,8 +27,10 @@ When a question is submitted:
 - The system will display a **"Generating answer.. (1.2s)"** timer.
 - Once context is retrieved from the Vector and Graph databases, the LLM will stream the Markdown-formatted answer back to the screen.
 - Analysis may take upto 300 seconds due to slow shared resources. Please keep patience.
+- **Providing Feedback**: Once an answer completes, you will see a Thumbs Up (👍) / Thumbs Down (👎) feedback interface along with an optional text field. Please submit your feedback to help us improve the system.
 - Responses remain preserved in the scrollable window for the duration of your session.
 
 ## 5. Security & Session Handling
-- **Multi-tenant Isolation**: Your conversation is strictly isolated from other users using an invisible `X-Session-Token`.
+- **Multi-tenant Isolation**: Your conversation is strictly isolated from other users using an invisible `X-Session-Token`. Multiple users can query the system concurrently without interference.
+- **Resumable Mobile Sessions**: If your mobile device goes to sleep or you navigate to another app, the system safely buffers your answer. When you return, the streaming will seamlessly resume without missing a word.
 - **Session Expiration**: If the page is reloaded, or if you are inactive for an extended period, your session token resets, and previous context is cleared to ensure privacy.

NITDAA_HEALTHEXPERT_USER_GUIDE.pdf

@@ -1,3 +1,3 @@
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