implement unlock dependencies

bin/app/data/config/modules.toml

@@ -4,6 +4,11 @@
 # content; stats, materials, and threat costs are placeholders until the
 # recipe and balancing passes.
 #
+# Unlock progression is mostly disabled (unlock_at_station_level = -1) pending
+# the balancing pass. The laser cannons are the exception: laser_cannon_m is
+# gated to station level 1, and laser_cannon_l requires laser_cannon_m to be
+# unlocked first (unlock_requires) — a demonstration of the prerequisite chain.
+#
 # Surface mask footprint ladder — footprints gate which hulls can mount a
 # module, purely through geometry (see ships.toml for the matching hull
 # grids):
@@ -39,7 +44,7 @@ attack_rate_hz = 2.0
 
 [[module]]
 id = "laser_cannon_m"
-unlock_at_station_level = -1
+unlock_at_station_level = 1
 surface_mask = [
     "OO",
     "OO"]
@@ -56,7 +61,8 @@ attack_rate_hz = 1.5
 
 [[module]]
 id = "laser_cannon_l"
-unlock_at_station_level = -1
+unlock_at_station_level = 1
+unlock_requires = ["laser_cannon_m"]
 surface_mask = [
     "OOO",
     "OOO",

bin/app/data/config/recipes.toml

@@ -2,8 +2,10 @@
 #
 # First real-content iteration of the production tree. Quantities and
 # durations are a first guess; the balancing pass will tune them and assign
-# real unlock_at_station_level values (everything is unlocked for now so the
-# full tree is testable).
+# real unlock_at_station_level values. Almost everything is unlocked for now so
+# the full tree is testable; the only gated recipe schematics are the medium and
+# large laser-cannon item recipes, which demonstrate the unlock_requires
+# prerequisite chain (large requires medium — see modules.toml / ships.toml).
 #
 # Input chain per game phase — each phase adds exactly one new base input:
 #
@@ -293,7 +295,7 @@ duration_seconds = 4.0
 
 [[recipe]]
 id = "laser_cannon_m_module"
-unlock_at_station_level = -1
+unlock_at_station_level = 1
 building = "assembler"
 inputs = [{item = "targeting_unit", amount = 1}, {item = "titanium_frame", amount = 1}]
 outputs = [{item = "laser_cannon_m_module", amount = 1}]
@@ -317,7 +319,8 @@ duration_seconds = 6.0
 
 [[recipe]]
 id = "laser_cannon_l_module"
-unlock_at_station_level = -1
+unlock_at_station_level = 1
+unlock_requires = ["laser_cannon_m_module"]
 building = "assembler"
 inputs = [
     {item = "targeting_unit", amount = 2},

bin/app/data/config/ships.toml

@@ -4,6 +4,11 @@
 # content; stats, materials, and production times are placeholders until the
 # recipe and balancing passes.
 #
+# Unlock progression is mostly disabled (unlock_at_station_level = -1) pending
+# the balancing pass. The capital hulls are the exception: battleship is gated
+# to station level 1, and dreadnought (level 2) requires battleship to be
+# unlocked first (unlock_requires) — a demonstration of the prerequisite chain.
+#
 # Size classes:
 #   xs  drone                      1 cell — exactly one 1x1 module
 #   s   frigate, destroyer         no 2x2 area anywhere: only 1x1/1x2/1x3/L modules fit
@@ -169,7 +174,7 @@ sensor_range_m = 260
 # so no 2x6 drone hangar fits.
 [[ship]]
 id = "battleship"
-unlock_at_station_level = -1
+unlock_at_station_level = 1
 layout = [
     "XOOOOX",
     "OOOOOO",
@@ -203,7 +208,8 @@ sensor_range_m = 280
 # stay the only hangar hull. Bow and stern strips hold supports.
 [[ship]]
 id = "dreadnought"
-unlock_at_station_level = -1
+unlock_at_station_level = 2
+unlock_requires = ["battleship"]
 layout = [
     "XXXOOOOOXXX",
     "OOOXOOOXOOO",