feat(frontend): tile-based office interior with LimeZu Modern Interiors tileset

- Replace outdoor farm scene with 20x15 tile office floor plan
- Add officeMap.js with tile definitions, map grid, walls, doorways, furniture
- Rewrite FarmCanvas.jsx with layered tile rendering (background, floor, walls, doors, furniture, agents)
- Use tileset.png for floor/wall/furniture tiles with proper source coordinates
- Design 6-room layout: Briefing Room, Commons, War Room, Engineering Bay, Quiet Zone, Ops Center
- Central hallway connecting all rooms with doorway openings
- Room labels drawn as floating pills
- Default agent positions reassigned to appropriate rooms
- Remove old BeOS icon tiles (replaced by LimeZu tileset)

assets/dawnlike

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+Subproject commit b5898187c2253d9213e4ae02d7228e81cdace302

assets/modern-interiors/Modern tiles_Free/LICENSE.txt

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+
+FREE VERSION LICENSE:
+
+CAN:
+YOU CAN USE THE ASSET IN NON COMMERCIAL PROJECTS
+YOU CAN EDIT THE SPRITES AND USE THEM IN NON COMMERCIAL PROJECTS
+
+CAN'T:
+YOU CAN'T USE THE ASSET IN COMMERCIAL PROJECTS
+YOU CAN'T EDIT THE SPRITES AND USE THEM IN COMMERCIAL PROJECTS
+YOU CAN'T EDIT AND RESELL THE SPRITES

assets/modern-interiors/Modern tiles_Free/READ ME.txt

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+Hi, thank you for downloading the free version!
+
+This version has around 1% of material of the full asset
+
+Consider buying the complete version (1.20$) if you like the asset :)