feat: separate Ollama text/image/think models + add YouTube downloader

Support OLLAMA_IMAGE_MODEL and new OLLAMA_THINK_MODEL (both default to OLLAMA_MODEL)

Add /ollamathink command; validate thinking capability; disable image-analysis flow in think mode

Make /ollama-get-model show Text/Image/Think blocks only when models differ

Add /ytdl (/youtube) command + auto-detect YouTube URLs in messages

Cache downloaded videos to data/video and schedule daily cleanup

Move photo storage from data/temp to data/photo; improve env boolean parsing via ifTrue

Update deps (youtubei.js, puppeteer*) and TS config (allowJs, allowSyntheticDefaultImports)

src/util/files.ts

@@ -0,0 +1,41 @@
+import {logError} from "./utils";
+import fs from "node:fs";
+import {videoDir} from "../index";
+import path from "node:path";
+
+export function clearUpVideoFolder() {
+    fs.readdir(videoDir, (err, files) => {
+        if (err) {
+            logError(err);
+            return;
+        }
+
+        const filenamesToDelete: string[] = [];
+
+        files.forEach((filename, index) => {
+            fs.stat(path.join(videoDir, filename), (err, stats) => {
+                if (err) {
+                    logError(err);
+                } else {
+                    const then = stats.mtime.getTime() / 1000;
+                    const now = Date.now() / 1000;
+                    const diff = Math.abs(now - then);
+                    const moreThanOneDay = diff >= 60 * 60 * 24;
+                    if (moreThanOneDay) {
+                        filenamesToDelete.push(filename);
+                    }
+
+                    if (index === files.length - 1) {
+                        console.log("filenamesToDelete", filenamesToDelete);
+                        if (filenamesToDelete.length) {
+                            filenamesToDelete.forEach((filename) => {
+                                const fullPath = path.join(videoDir, filename);
+                                fs.rm(fullPath, logError);
+                            });
+                        }
+                    }
+                }
+            });
+        });
+    });
+}