Add detect_environment() function for runtime re-detection

[Copilot]

Environment detection runs once on initial sourcing. Scripts that switch contexts (CI → interactive) or temporarily force fallback mode have no way to re-detect without re-sourcing the entire library.

Changes

• init.sh: Add detect_environment() function encapsulating all detection logic

  • Defined as a reusable function that's called immediately for initial detection
  • Respects pre-set INTERFACE and GUI variables (only detects if unset)
  • Updates all environment globals: DETECTED_DESKTOP, INTERFACE, GUI, terminal, tool availability flags, sudo method, etc.

• README.md: Document function and add usage example

• helpers.sh: Remove duplicate detection code to maintain single source of truth

Usage

source script-dialog.sh

# Force fallback for CI operations
INTERFACE=""
GUI=false
# ... CI work ...

# Re-detect for interactive context
unset INTERFACE
unset GUI
detect_environment  # Now using whiptail/dialog/zenity as available

message-info "Now in interactive mode"

Backward compatible—existing scripts unchanged. Eliminates code duplication by defining the function once in init.sh.

Original prompt

We should allow users to re-run the environment detection, so that if they happen to force a mode, like fallback/dumb mode and then later go into another context (like going from CI to interactive contexts in a script).

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[lunarcloud]

is it possible to call detect_environment here instead of having duplicate code?

[Copilot]

Yes! I've moved the detect_environment() function to init.sh and eliminated the duplicate code. The function is now defined once in init.sh (where it's called for initial detection) and can be called later for re-detection. This removes 165 lines of duplicate code from helpers.sh. (commit 4e90bd7)