npm install -g @google/gemini-cli@latest

Objective: Build a visually stunning, photorealistic 3D Voxel simulation of the Golden Gate Bridge using Three.js, prioritizing quality and complex visuals (no simple blocks),  atmospheric depth and 60FPS performance.

Visuals & Atmosphere:
- Lighting: Slider (0-24h) controlling sun position, light intensity, sky color, and fog color.
- Fog: Volumetric-style fog using sprite particles that drift and bob. Slider 0-100. 0 = True Zero (Crystal Clear). 100 = Dense but realistic (not whiteout).
- Water: Custom GLSL shader with waves, specular reflections, and manual distance-based fog blending (exp2) for seamless horizon integration.
- Post-Processing: ACESFilmic Tone Mapping and UnrealBloom (optimized for glowing lights at night).

Scene Details:
- Bridge: Art Deco towers with concrete piers (anchored to seabed), main span catenary cables, and suspenders.
- Terrain: Low-poly Marin Headlands and SF Peninsula.
- Skyline: Procedural city blocks on the SF side.
- Traffic: Up to 400 cars using `InstancedMesh`, positioned accurately on top of the deck (ensure vertical alignment prevents clipping into the concrete). Each car features emissive headlights (white) and taillights (red).
- Ships: Procedural cargo ships with hull, containers, and functional navigation lights (Port/Starboard/Mast/Cabin) moving along the water.
- Nature: Animated flocking birds.
- Night Mode: At night, activate city lights, car headlights, ship navigation lights, tower beacons, street lights.

Tech & Controls:
- Core: Must output only single HTML file `golden_gate_bridge.html` to be run in a blank Chrome tab. Import Three.js/Addons via CDN map.
  -   `three` (Core library) via CDN (ES Modules).
  -   `three/examples/jsm/...` modules via Import Map.
  -   No build step (Vite/Webpack). Pure HTML/JS.

- UI: Visually appealing sliders for Time (0-24h), Fog Density (0-100%), Traffic Density (0-100%), and Camera Zoom.
- Optimization: `InstancedMesh` for all repetitive elements (cars, lights, birds).

Create a UI for "Project Constellation," an internal brand intelligence tool prototype that shows a customer acquisition pipeline. The aesthetic is an ultra-creative, futuristic dark-mode nebula. Luminous, iridescent threads representing customer journeys weave through semi-transparent glass pillars. A sleek, floating data card with Tailwind CSS precision materializes when hovering over a pillar. I've prepared a sketch for you to work from: @sketch.png.

At some point I lost the commit that set my default theme to dark. 
Find it for me with git bisect and return the hash to me.

"This is an application that does not have any documentation and we do not have a technical writer. Before you begin, review all of the code. Then make me a user documentation. This document should only explain user facing features, but make sure to explain every single feature such as usage of the app, command line options, authentication options, built in tools, and all other user facing features. For certain features such as MCP or extensions, also explain the topic and concept so that the user has a better understanding. Since this is an open source project, provide an architectural overview of how the code is laid out, a summary of each component, and how they can contribute to the open-source project. The document should be organized and formatted so that it is easy to read and find. Do not make it a single html page. Make sure to add a search feature."

Users are reporting that the "Save Changes" button is slow, investigate the 'tech-stack' service