feat: proactive workspace analysis + Kimi K2.5 file-tree injection (v1.2.0)

[Copilot]

NVIDIA NIM rejects chat_template_kwargs.thinking + tools in the same request, leaving Kimi K2.5 and DeepSeek R1 with zero tool access and a one-liner system prompt — so they ask users to paste code instead of reading the workspace. All models also lacked any instruction to explore proactively.

v2/src/core/system-prompt.mjs

• buildWorkspaceSnapshot(cwd, maxFiles=200) (new export) — recursive readdirSync walk skipping node_modules, .git, dist, .next, __pycache__, etc. and hidden files (except a whitelist of common config dotfiles); returns a capped indented tree or '' on error
• Agentic base preamble replaces "You are an AI coding assistant." — declares cwd, adds a ## Workspace exploration rules block instructing all models to use LS/Glob/Read/Grep/Bash before answering, hard-forbids asking the user to paste code; staticPrefix/dynamicSuffix cache split unchanged

v2/src/core/agent-loop.mjs

• In callNvidia when supportsThinking=true, appends buildWorkspaceSnapshot(process.cwd()) as a fenced ## Workspace file structure (read-only reference) block to the static system prompt, giving Kimi K2.5 / DeepSeek R1 structural project awareness without tool calls:

const snapshot = buildWorkspaceSnapshot(process.cwd());
systemPrompt = snapshot
    ? base + '\n\n## Workspace file structure (read-only reference)\n\n```\n' + snapshot + '\n```'
    : base;

vscode-extension/

• package.json: bumped to v1.2.0; thinking-model enumDescriptions note workspace injection; install-vsix script updated
• README.md: new Proactive workspace analysis feature section; NVIDIA thinking-model explanation; install commands updated to 1.2.0

Root README.md

• v1.2.0 entry in What's New; NVIDIA note updated; test badge corrected to 913; install commands updated