feat(infra): grupo claude-fleet — FleetView TUI + orquestacion de Claudes

Sistema FleetView para centralizar la flota de procesos Claude Code vivos en una
sola ventana kitty + tmux (socket aislado -L fleet) con un panel TUI:

- list_claude_fleet (+ tipo claude_fleet): escanea ~/.claude/sessions + goals +
  runtime, valida procesos vivos (anti-PID-reciclado), join por sessionId.
- list_resumable_claudes (+ tipo resumable_claude): sesiones cerradas reanudables.
- wrappers tmux: tmux_new_claude_window (con --resume), tmux_swap_window_into_console
  (preserva ancho del sidebar), tmux_map_claude_panes.
- launch_kittyclaude: comando entrypoint; instala atajos alt+flechas/enter/n/0/k/r,
  mouse on, remain-on-exit off; fija el ancho del sidebar con hooks.
- docs/capabilities/claude-fleet.md + entrada en el INDEX.

Incluye ademas funciones datascience en progreso (excel/duckdb/postgres) y ajustes
varios de docs e infra de otra sesion, agrupados aqui para no perderlos.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

functions/infra/claude_fleet.go

@@ -0,0 +1,28 @@
+//go:build !windows
+
+package infra
+
+// ClaudeFleet describes a single Claude Code session process on the local
+// machine, cross-joining the live process state (/proc) with the session and
+// goal metadata that Claude Code persists under ~/.claude.
+//
+// It is the data record consumed by the fleetview TUI. Every field is derived
+// from a single ~/.claude/sessions/<PID>.json entry plus its optional
+// ~/.claude/goals/<sessionId>.json sidecar and the process' own /proc entry.
+type ClaudeFleet struct {
+	PID        int    `json:"pid"`
+	KittyPID   int    `json:"kitty_pid"`   // KITTY_PID from the process environ; 0 if not applicable (e.g. remote tmux)
+	SessionID  string `json:"session_id"`  // Claude Code sessionId (UUID)
+	Rename     string `json:"rename"`      // display name: short goal if present, else basename(cwd)
+	Target     string `json:"target"`      // sessionId[:8] + "@" + basename(cwd)
+	Goal       string `json:"goal"`        // from goals/<sessionId>.json .goal ("" if absent)
+	Phase      string `json:"phase"`       // from goals/<sessionId>.json .phase ("" if absent)
+	Emojis     string `json:"emojis"`      // 3 emojis representing the task (from goals .emojis; "" if absent)
+	Name       string `json:"name"`        // manual rename of the terminal (from goals .rename; "" if none)
+	Status     string `json:"status"`      // idle|busy|waiting (from sessions/<pid>.json)
+	Cwd        string `json:"cwd"`         // working directory of the session
+	TmuxWindow string `json:"tmux_window"` // "" for now (populated in a later phase)
+	Alive      bool   `json:"alive"`       // process alive AND procStart matches (guards against PID recycling)
+	UpdatedAt  int64  `json:"updated_at"`  // from sessions/<pid>.json .updatedAt (epoch millis)
+	CtxPct     int    `json:"ctx_pct"`     // context window used %, from runtime/<sessionId>.json; -1 if unknown
+}