rfc: infinite scrolling

docs/rfcs/2024-10-07-chat-infinite-scrolling.md

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+# Chat infinite scrolling
+
+## Problem
+
+The current scroll-based data loading model, where new messages are loaded as users scroll upwards, introduces several usability challenges for the app:
+- The system cannot reliably open a chat at the first unread message on a given chat because data may not yet be loaded for that page.
+- Features like tapping on a quote to jump to older messages are not supported due to the absence of a stable mechanism to navigate across distant points in the chat history.
+- When users search for a message, the results are shown without surrounding context, severely limiting the usefullness of this feature
+
+## Solution
+
+Adopting a bi-directional infinite scroll system that fetches and displays chat data on demand as users scroll both upwards and downwards.
+
+This approach will directly impact all users by enabling:
+- **Seamless navigation:** Users can jump to any point in the chat history (e.g., first unread message or an older quoted message) without the need to load the entire conversation.
+- **Enhanced search experience:** Search results will be more useful by fetching both the matching messages and their surrounding context, allowing users to follow the flow of the conversation.
+
+At the same time, this system will:
+- Optimize memory usage.
+- Contain database fetch operations.
+- Maintain smooth scrolling.
+
+### Option 1
+Keep single "Fragment" of chat items
+
+### Option 2
+Keep 2 "Fragements" of chat items
+
+### Option 3
+Keep N "Fragments" of chat items