feat(launcher): add -H/--history command to browse local watch history

- New `subminer -H` flag opens an fzf/rofi menu of watched series from the immersion tracker DB
- Actions: replay last episode, play next episode (cross-season), or browse episodes
- Adds `history.ts` with DB query, series grouping, season dir listing, and next-episode logic
- Adds `bun-sqlite.d.ts` ambient types for tsc compat
- Includes full test coverage in `history.test.ts`

launcher/bun-sqlite.d.ts

@@ -0,0 +1,26 @@
+// Minimal ambient typing for bun:sqlite. The launcher always runs under bun
+// (see the build banner in package.json), but the repo typechecks with plain
+// tsc which has no bun type definitions.
+declare module 'bun:sqlite' {
+  export interface RunResult {
+    changes: number;
+    lastInsertRowid: number | bigint;
+  }
+
+  export interface Statement {
+    all(...params: unknown[]): unknown[];
+    get(...params: unknown[]): unknown;
+    run(...params: unknown[]): RunResult;
+  }
+
+  export class Database {
+    constructor(
+      filename: string,
+      options?: { readonly?: boolean; readwrite?: boolean; create?: boolean },
+    );
+    query(sql: string): Statement;
+    prepare(sql: string): Statement;
+    run(sql: string, ...params: unknown[]): RunResult;
+    close(): void;
+  }
+}