Check every module name in the Vue dropdown against Factorio #191

Split out of #80, item 3. That item survived the Rust port.

src/vue/src/components/ModuleSelect.vue:12-23 hardcodes nine module names: efficiency-module, productivity-module and speed-module, at tiers 1 to 3. Only the three tier-3 names are checked against the captured Factorio fixture. They are in item_names::vanilla in rust/planner/src/data.rs:178-188, which rust/planner/tests/factorio_oracle.rs checks. The other six are checked against nothing. So the next module rename in Factorio would break the dropdown the same way effectivity-module did in 2.0, and no test would notice.

Fix

• Generate the module list instead of typing it. The repo already does this for planner constants: rust/contract/tests/planner_defaults.rs writes src/vue/src/lib/plannerDefaults.verified.json and fails when the file is stale.
• Add all nine module names to the Rust side, so the oracle test checks them. Emit them from that same test, and have ModuleSelect.vue read the list from the JSON.
• Keep the display labels ("Speed module 2") in the Vue code, or generate them from the names.

Done when

• A renamed or removed module name fails cargo test.
• The dropdown shows the same nine options as today.