Add headless CLI for Overleaf project management (lattex-cli)

New src/cli/ module providing a headless CLI for AI agents to work with
Overleaf projects from a server with no display. Commands: auth, projects,
clone, pull, status, push, compile.

Key design decisions:
- Uses Node.js https module (no Electron dependency), same approach as the
  existing MCP server in src/mcp/lattex.mjs
- Reuses overleafProtocol.ts for Socket.IO v0.9 parsing (pure, no Electron)
- Separate esbuild bundle (out/cli/lattex-cli.mjs) — does not touch the
  Electron app build
- 64 tests for arg parsing, file tree walking, diff logic, and log parsing

Files:
- src/cli/main.ts — CLI entry point with all commands
- src/cli/args.ts — argument parser
- src/cli/overleafApi.ts — Overleaf API client using https + ws
- src/cli/fileTree.ts — project root folder walker
- src/cli/localState.ts — per-clone state (.lattex-cli.json) and auth storage
- src/cli/diff.ts — local vs remote diff logic
- src/cli/logParser.ts — LaTeX compile log parser
- src/cli/test.ts — unit tests
- tsconfig.cli.json — TypeScript config for CLI

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/src/cli/args.ts b/src/cli/args.ts
new file mode 100644
index 0000000..0f7a767
--- /dev/null
+++ b/src/cli/args.ts
@@ -0,0 +1,39 @@
+// CLI argument parser
+
+export interface ParsedArgs {
+  command: string
+  positional: string[]
+  flags: Record<string, string | boolean>
+}
+
+export function parseArgs(argv: string[]): ParsedArgs {
+  const args = argv.slice(2)
+  const command = args[0] || ''
+  const positional: string[] = []
+  const flags: Record<string, string | boolean> = {}
+
+  for (let i = 1; i < args.length; i++) {
+    const arg = args[i]
+    if (arg.startsWith('--')) {
+      const eqIdx = arg.indexOf('=')
+      if (eqIdx !== -1) {
+        flags[arg.slice(2, eqIdx)] = arg.slice(eqIdx + 1)
+      } else if (i + 1 < args.length && !args[i + 1].startsWith('--')) {
+        const key = arg.slice(2)
+        // Boolean flags that never take a value
+        const boolFlags = new Set(['json', 'dry-run', 'delete', 'force', 'help'])
+        if (boolFlags.has(key)) {
+          flags[key] = true
+        } else {
+          flags[key] = args[++i]
+        }
+      } else {
+        flags[arg.slice(2)] = true
+      }
+    } else {
+      positional.push(arg)
+    }
+  }
+
+  return { command, positional, flags }
+}