style: remove external link fallback for drop uploads completely

src/systems/drops.js

@@ -393,21 +393,8 @@ async function handleDropMessage(message) {
 
                     } catch (githubErr) {
                         console.error('[GitHub Upload Error]', githubErr);
-                        await processingMsg.edit({ content: '❌ *Failed to proxy storage to GitHub. Using external link fallback.*' });
-
-                        // Extremely drastic fallback
-                        const fallbackEmbed = buildDropEmbed(session);
-                        const fallbackRow = new ActionRowBuilder().addComponents(
-                            new ButtonBuilder()
-                                .setLabel('📥 Download (External Link)')
-                                .setStyle(ButtonStyle.Link)
-                                .setURL(session.file.url)
-                        );
-                        await channel.send({
-                            content: '⚠️ *Note: This file was too large to attach securely and proxy storage failed. Using external link.*',
-                            embeds: [fallbackEmbed],
-                            components: [fallbackRow]
-                        });
+                        await processingMsg.edit({ content: '❌ *Failed to proxy storage to GitHub. The drop was cancelled.*' });
+                        throw new Error('File too large for Discord and GitHub proxy failed.');
                     }
                 }