bridge: REQ-2026-04-16-modpack-installer-tweaks — 7 UI tweaks before Holly sees it

docs/code-bridge/requests/REQ-2026-04-16-modpack-installer-tweaks.md

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+# REQ-2026-04-16-modpack-installer-tweaks
+
+**From:** Chronicler #93  
+**Date:** 2026-04-16  
+**Priority:** HIGH — needs done before Holly sees it tomorrow  
+**Status:** PENDING  
+**Linked Task:** #101 follow-up tweaks  
+
+## Context
+
+Modpack Installer is deployed and working. Michael reviewed the UI and has 7 tweaks before Holly sees it tomorrow.
+
+---
+
+## Tweaks
+
+### 1. Node Selector — Show Current Usage
+Replace the plain NC1/TX1 dropdown with live RAM and disk usage per node. Query Pterodactyl Client API for each node's resource usage. Display inline under each option:
+- `❄️ NC1 — Charlotte | RAM: 42GB / 64GB | Disk: 1.2TB / 2TB`
+- `🔥 TX1 — Dallas | RAM: 38GB / 64GB | Disk: 900GB / 2TB`
+User picks the node, you can see the headroom. No auto-selection.
+
+### 2. Disk Space Field
+Add a disk allocation field (MB) alongside RAM. Pre-fill from provider API pack size estimate if available. Required before install.
+
+### 3. Smart JVM — Auto-Inject Aikar Flags
+Add a JVM Arguments field that auto-populates with Aikar G1GC flags based on RAM allocation. Recalculates when RAM changes. Editable override. Use the same flags already in Pterodactyl startup commands across the fleet — substitute RAM value into -Xms and -Xmx.
+
+### 4. Spawn Type — Add Vanilla + Rename
+- `vanilla` — "Vanilla (no spawn changes)" ← NEW DEFAULT
+- `standard` — "Standard" (drop the Bitch Bot parenthetical)
+- `skyblock` — "Skyblock (no spawn paste)"
+- `has_lobby` — "Has Lobby (pack provides its own)"
+
+### 5. Java Version Field
+Auto-select based on MC version:
+- 1.16.x and below → Java 8
+- 1.17.x → Java 17
+- 1.18.x–1.20.x → Java 17
+- 1.21.x and above → Java 21
+
+Pre-fill on pack selection. Editable dropdown (8, 17, 21). Passed to Pterodactyl egg startup config.
+
+### 6. Port Allocation
+Auto-assign next available port on selected node. Query existing servers on that node via Pterodactyl API, find highest used port in Minecraft range (25565–25700), assign next. Show as read-only with a "Re-roll" button. No manual entry.
+
+### 7. Resource Estimates — Surface in UI
+Show mod count and estimated pack size on the pack details card. Use these to drive RAM and disk pre-fill suggestions.
+
+---
+
+## Files to Touch
+
+- `src/views/admin/modpack-installer/_pack_details.ejs`
+- `src/routes/admin/modpack-installer.js`
+- `src/services/providerApi/curseforge.js`
+- `src/services/providerApi/modrinth.js`
+
+---
+
+## Deploy
+
+Standard pattern. No new migrations needed.