feat(ui): star map insert module — concentric hop-ring view (#674)

New StarMapRenderer: 301 systems in concentric hop-rings from player
location, sector-colored, click-to-select with info panel, pan/zoom.
Integrated into HUD (hidden by default), insert state propagation
wired in main.gd. Data enriched from systems.db + star-map.json via
tooling/generate-star-map-data.py regeneration script.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/scripts/main.gd

@@ -24,6 +24,7 @@ extends Node2D
 @onready var loading_screen = $ModalLayer/LoadingScreen       # #257: blocking overlay during load
 @onready var debug_console = $ModalLayer/DebugConsole         # #581: tilde debug console
 @onready var news_ticker = $UILayer/NewsTicker                # #592: scrolling headline bar (D-049 z-7)
+@onready var star_map = $UILayer/HUD/StarMap                  # #674: star map insert module (hop-ring view)
 
 var _last_dialogue_npc_id: int = -1  # D-064: NPC entity_id for WalkAway input
 var _last_dialogue_npc_name: String = ""  # #535: NPC name for dialogue_response attribution
@@ -254,6 +255,8 @@ func _propagate_insert_state() -> void:
 		interaction_prompt.set_insert_active(insert_state)
 	if minimap:
 		minimap.set_insert_active(insert_state)
+	if star_map:
+		star_map.set_insert_active(insert_state)
 
 
 # D-057: Update interaction list from game state.