feat: auto-delete old conversations, and stop a tool call that repeats (#15)

src/lib/types.ts

@@ -90,6 +90,14 @@ export interface ToolCallRecord {
   arguments: Record<string, unknown>;
   result: string;
   isError: boolean;
+  /**
+   * Set when the call was refused because the turn had already made it twice.
+   *
+   * Stored rather than inferred from the message text, so the transcript can say
+   * what happened in its own words, and so a repeat that ended a turn stays
+   * visible even when the user has hidden tool calls from the transcript.
+   */
+  repeated?: boolean;
 }
 
 /** One question and its answer. The unit the transcript is rendered from. */
@@ -125,6 +133,19 @@ export interface SessionSummary {
   updatedAt: number;
   turnCount: number;
   preview: string;
+  /**
+   * Every image path any turn in this conversation refers to.
+   *
+   * Kept here rather than derived from the turns for one reason: the orphan
+   * sweep needs to know which snips are still spoken for, and loading every
+   * transcript to find out would mean a hundred JSON parses on every turn.
+   *
+   * Absent on entries written before this field existed, which is deliberately
+   * not the same as an empty array: an absent value means "unknown", and the
+   * sweep resolves it by reading that one transcript rather than by assuming the
+   * conversation has no screenshots and deleting them.
+   */
+  attachmentPaths?: string[];
 }
 
 /** A model as reported by `GET /api/tags`. */