Config: .env = projects root only; derive each project's forge from git

Reduce .env to just REPOS_HOST_PATH (the projects root); runtime bootstrap moves to compose/defaults. Projects are the subdirectories of the single root — removed the project-directories feature (store table, service methods, /api/config/project-dirs, Settings section). Each project's forge is derived from its git remote (matched to a configured forge, else the bare host) and shown as a pill next to its name (State.Forge via scanner ForgeFor + svc.ForgeDisplay). Removed first-run .env seeding; forges + identity are managed in Settings. Added forge.HostOf. AGENT.md updated.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

internal/repos/repos.go

@@ -26,6 +26,7 @@ type State struct {
 	Ahead     int       `json:"ahead"`
 	Behind    int       `json:"behind"`
 	Remotes   []string  `json:"remotes"`
+	Forge     string    `json:"forge,omitempty"` // forge this project belongs to (derived from its remote)
 	UpdatedAt time.Time `json:"updatedAt"`
 	Error     string    `json:"error,omitempty"` // set if refreshing this repo failed
 }
@@ -69,6 +70,9 @@ type Config struct {
 	MaxDepth int
 	Ignore   []string
 	Fetch    bool
+	// ForgeFor maps a repo's origin remote URL to a display label for the forge it
+	// belongs to (a configured forge's name, else the bare host, else ""). May be nil.
+	ForgeFor func(remoteURL string) string
 }
 
 // ConfigFunc supplies the current scan configuration.
@@ -123,7 +127,7 @@ func (s *Scanner) Refresh(ctx context.Context) {
 			return
 		default:
 		}
-		s.Index.set(s.refreshOne(ctx, p, cfg.Fetch))
+		s.Index.set(s.refreshOne(ctx, p, cfg.Fetch, cfg.ForgeFor))
 	}
 }
 
@@ -131,10 +135,11 @@ func (s *Scanner) Refresh(ctx context.Context) {
 // mutating action so the UI reflects the new state without waiting for the next
 // full scan. It never fetches (network) — it only re-reads local state.
 func (s *Scanner) RefreshRepo(ctx context.Context, path string) {
-	s.Index.set(s.refreshOne(ctx, path, false))
+	cfg := s.cfgFn(ctx)
+	s.Index.set(s.refreshOne(ctx, path, false, cfg.ForgeFor))
 }
 
-func (s *Scanner) refreshOne(ctx context.Context, path string, fetch bool) State {
+func (s *Scanner) refreshOne(ctx context.Context, path string, fetch bool, forgeFor func(string) string) State {
 	rctx, cancel := context.WithTimeout(ctx, 20*time.Second)
 	defer cancel()
 
@@ -161,8 +166,19 @@ func (s *Scanner) refreshOne(ctx context.Context, path string, fetch bool) State
 
 	st.Ahead, st.Behind, _ = s.git.AheadBehind(rctx, path)
 
-	if remotes, err := s.git.Remotes(rctx, path); err == nil {
-		st.Remotes = remotes
+	// Remote names, plus the origin URL used to derive which forge this project
+	// belongs to (§ "get it from git").
+	if details, err := s.git.RemoteDetails(rctx, path); err == nil {
+		var originURL string
+		for _, rm := range details {
+			st.Remotes = append(st.Remotes, rm.Name)
+			if rm.Name == "origin" || originURL == "" {
+				originURL = rm.URL
+			}
+		}
+		if forgeFor != nil && originURL != "" {
+			st.Forge = forgeFor(originURL)
+		}
 	}
 
 	return st