Fix 2 major sources of casino.js slowness

1. We forgot our mantra to create no temp files, so we were going through expensive cleanup / kill-all-scripts logic each time.
2. We had no quick-detection of a game that was not yet over - we were waiting for all win/lose/tie detections to time out.

casino.js

@@ -121,8 +121,12 @@ export async function main(ns) {
     }
     let inputWager, btnStartGame;
 
+    // Note, we deliberately DO NOT pre-emptively check our active source files, or do any kind of RAM dodging
+    // const unlockedSFs = await getActiveSourceFiles(ns, true); // See if we have SF4 to travel automatically
+    // Why? Because this creates "Temp files", and we want to keep the safe file as small as possible for fast saves and reloads.
+    //      We use an empty temp folder as a sign that we previously ran and killed all scripts and can safely proceed.
+
     // Step 2: Try to navigate to the blackjack game (with retries in case of transient errors)
-    const unlockedSFs = await getActiveSourceFiles(ns, true); // See if we have SF4 to travel automatically
     let priorAttempts = 0;
     while (true) {
         if (priorAttempts > 0)
@@ -137,15 +141,11 @@ export async function main(ns) {
                 if (ns.getPlayer().money < 200000)
                     throw new Error("Sorry, you need at least 200k to travel to the casino.");
                 let travelled = false;
-                if (4 in unlockedSFs) { // With SF4, we can travel automatically
-                    try {
-                        travelled = await getNsDataThroughFile(ns, 'ns.singularity.travelToCity(ns.args[0])', null, ["Aevum"]);
-                    } catch { }
-                    if (!travelled)
-                        log(ns, "WARN: Failed to travel to Aevum automatically (perhaps RAM / SF4 level is too low?). " +
-                            "We will try to go there manually for now.", true, 'warning');
-                } else
-                    log(ns, `INFO: We must "manually" travel to Aevum since we don't have SF4`, true);
+                try {
+                    travelled = await getNsDataThroughFile(ns, 'ns.singularity.travelToCity(ns.args[0])', null, ["Aevum"]);
+                } catch { }
+                if (!travelled) // Note: While it would be nice to confirm whether we have SF4 for the message, it's not worth the cost.
+                    log(ns, "INFO: Canot use singularity travel to Aevum via singularity. We will try to go there manually for now.", true);
                 // If automatic travel failed or couldn't be attempted, try clicking our way there!
                 if (!travelled) {
                     await click(ns, await findRequiredElement(ns, "//div[@role='button' and ./div/p/text()='Travel']"));
@@ -165,13 +165,12 @@ export async function main(ns) {
                 await click(ns, await findRequiredElement(ns, "//span[@aria-label = 'Iker Molina Casino']"));
             } catch (err) { // Try to use SF4 as a fallback (if available) - it's more reliable.
                 let success = false, err2;
-                try { success = 4 in unlockedSFs ? await getNsDataThroughFile(ns, 'ns.singularity.goToLocation(ns.args[0])', null, ["Iker Molina Casino"]) : false; }
+                try { success = await getNsDataThroughFile(ns, 'ns.singularity.goToLocation(ns.args[0])', null, ["Iker Molina Casino"]); }
                 catch (singErr) { err2 = singErr; }
                 if (!success)
                     throw new Error("Failed to travel to the casino both using UI navigation and using SF4 as a fall-back." +
                         `\nUI navigation error was: ${getErrorInfo(err)}\n` + (err2 ? `Singularity error was: ${getErrorInfo(err2)}` :
-                            (4 in unlockedSFs) ? '`ns.singularity.goToLocation("Iker Molina Casino")` returned false, but no error...' :
-                                "And we don't have SF4 so couldn't travel with singularity."));
+                            '`ns.singularity.goToLocation("Iker Molina Casino")` returned false, but no error...'));
             }
 
             // Step 2.4: Try to start the blackjack game
@@ -353,6 +352,8 @@ async function getWinLoseOrTie(ns) {
     // 1+2+3+4+5=15 total retries, but all with small ms wait times (<20ms), so should still only take a second
     let retries = 0;
     while (retries++ < 5) {
+        if (await tryfindElement(ns, "//button[text() = 'Hit']", retries))
+            return null; // Game is not over yet, we can still hit
         if (await tryfindElement(ns, "//p[contains(text(), 'lost')]", retries))
             return "lose";
         // Annoyingly, when we win with blackjack, "Won" is Title-Case, but normal wins is just "won".