feat: snip a region into chat, and make links clickable (#14)

src/lib/sessions.ts

@@ -1,7 +1,7 @@
 import { LocalStorage } from "@vicinae/api";
 import { MAX_SESSIONS, MAX_STORED_CHARS_PER_TURN, MAX_TURNS_PER_SESSION, STORAGE_INDEX_KEY, STORAGE_SESSION_PREFIX, TITLE_MAX_LENGTH } from "./constants";
 import { SessionIndexSchema, SessionSchema } from "./schemas";
-import type { ChatTurn, Session, SessionSummary } from "./types";
+import type { Attachment, ChatTurn, Session, SessionSummary } from "./types";
 import { titleFromPrompt, truncate } from "./utils";
 
 /**
@@ -56,7 +56,12 @@ export function createSession(model: string, now: number = Date.now()): Session
 }
 
 /** Creates the turn record for a prompt that is about to be sent. */
-export function createTurn(prompt: string, model: string, now: number = Date.now()): ChatTurn {
+export function createTurn(
+  prompt: string,
+  model: string,
+  now: number = Date.now(),
+  attachments: Attachment[] = [],
+): ChatTurn {
   return {
     id: newId(),
     prompt,
@@ -65,6 +70,7 @@ export function createTurn(prompt: string, model: string, now: number = Date.now
     model,
     createdAt: now,
     toolCalls: [],
+    attachments,
   };
 }