Add LSP completion/code actions/rename/signature help infrastructure, fix TypeScript LSP, rebrand app identifiers

- LSP Layer: Add completion, completion_resolve, signature_help, code_action,
  prepare_rename, and rename methods to TextDocumentService and LspServerModel
- Types: Add CompletionItemData, CompletionResult, SignatureHelpResult,
  CodeActionData, PrepareRenameResult, RenameResult, FileEdits
- Feature Flags: Add LspCompletion, LspCodeActions, LspRename, LspSignatureHelp
- Client Capabilities: Declare completion, signature help, rename, and code
  action capabilities so servers advertise these features
- Completion UI: Add completion state machine with debounced triggers, fuzzy
  filtering, positioned overlay menu, and edit application
- TypeScript LSP: Switch to npx for running typescript-language-server (handles
  download/caching automatically, survives node version switches)
- PATH Resolution: Add interactive shell PATH fallback for LSP server discovery
  and spawning (fixes nvm/fnm/volta users)
- App Identity: Rebrand from com.samsung.Galaxy/dev.warp.WarpOss to
  samsung.galaxy.GalaxyOss across bundle IDs, URL schemes, and plists
- Add scripts/reset-galaxy.sh for clean slate testing
- Galaxy status messages and other in-progress work

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/reset-galaxy.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+# Resets all Galaxy app state to a fresh install.
+# Run this before launching galaxy-oss if you want a clean slate.
+
+set -e
+
+echo "Resetting Galaxy to fresh state..."
+
+# Home config/data
+rm -rf ~/.galaxy
+
+# macOS Application Support (session history, chat history, workspace state)
+rm -rf ~/Library/Application\ Support/com.samsung.Galaxy
+rm -rf ~/Library/Application\ Support/com.samsung.Galaxy-Stable
+rm -rf ~/Library/Application\ Support/com.samsung.GalaxyAI
+rm -rf ~/Library/Application\ Support/samsung.galaxy.GalaxyOss
+rm -rf ~/Library/Application\ Support/samsung.galaxy.GalaxyStable
+rm -rf ~/Library/Application\ Support/samsung.galaxy.GalaxyDev
+rm -rf ~/Library/Application\ Support/samsung.galaxy.GalaxyLocal
+rm -rf ~/Library/Application\ Support/samsung.galaxy.GalaxyPreview
+
+# macOS Saved Application State (window restoration)
+rm -rf ~/Library/Saved\ Application\ State/com.samsung.Galaxy.savedState
+rm -rf ~/Library/Saved\ Application\ State/com.samsung.Galaxy-Stable.savedState
+rm -rf ~/Library/Saved\ Application\ State/com.samsung.GalaxyAI.savedState
+rm -rf ~/Library/Saved\ Application\ State/samsung.galaxy.GalaxyOss.savedState
+rm -rf ~/Library/Saved\ Application\ State/samsung.galaxy.GalaxyStable.savedState
+rm -rf ~/Library/Saved\ Application\ State/samsung.galaxy.GalaxyDev.savedState
+rm -rf ~/Library/Saved\ Application\ State/samsung.galaxy.GalaxyLocal.savedState
+
+# macOS Caches
+rm -rf ~/Library/Caches/com.samsung.Galaxy
+rm -rf ~/Library/Caches/com.samsung.Galaxy-Stable
+rm -rf ~/Library/Caches/com.samsung.GalaxyAI
+rm -rf ~/Library/Caches/samsung.galaxy.GalaxyOss
+rm -rf ~/Library/Caches/samsung.galaxy.GalaxyStable
+rm -rf ~/Library/Caches/samsung.galaxy.GalaxyDev
+rm -rf ~/Library/Caches/samsung.galaxy.GalaxyLocal
+
+# Logs
+rm -f ~/Library/Logs/galaxy*.log*
+
+# macOS Preferences
+defaults delete com.samsung.Galaxy 2>/dev/null || true
+defaults delete com.samsung.Galaxy-Stable 2>/dev/null || true
+defaults delete com.samsung.GalaxyAI 2>/dev/null || true
+defaults delete samsung.galaxy.GalaxyOss 2>/dev/null || true
+defaults delete samsung.galaxy.GalaxyStable 2>/dev/null || true
+defaults delete samsung.galaxy.GalaxyDev 2>/dev/null || true
+defaults delete samsung.galaxy.GalaxyLocal 2>/dev/null || true
+
+echo "Done. Galaxy will start fresh on next launch."