feat(ralph): interactive UX layer pe Discord și Telegram (W1)

Adaugă straturile interactive peste slash commands flat:

**Discord (`src/adapters/discord_views.py`):**
- `RalphRootView` — listă proiecte workspace cu emoji status + Refresh + Close
- `RalphProjectView` — Propose / Vezi PRD / Aprobă tonight / Status / Stop / Înapoi
- `RalphProposeModal` — TextInput pentru descriere feature
- Critical pattern: `await interaction.response.defer(ephemeral=True)` în orice button
  callback cu I/O (eng review concern #2 — "Discord 3s timeout")
- `/p slug` autocomplete din `~/workspace/`
- `/l` afișează `RalphRootView` ephemeral

**Telegram (`src/adapters/telegram_bot.py`):**
- `cmd_ralph_l` (fără arg) trimite `InlineKeyboardMarkup` cu workspace + active
- `callback_ralph` cu pattern `^ralph:` rutează: project, menu, refresh, close,
  propose, prd, status, approve, stop
- Pentru "Propose feature" → set ralph_flow state cu step=input_description
  + `ForceReply()`; `handle_message` detectează state și rutează la `_ralph_propose`
- Pasează `adapter_name="telegram"` la `route_message`

**State management (`src/ralph_flow.py`):**
- Atomic JSON peste `sessions/ralph_flow.json` (pattern reusat din claude_session)
- Schema per (adapter, chat, user): `{step, project?, expires_at, ...}`
- TTL 10 min default; `cleanup_expired()` și auto-drop la `get_state` pe expirate

**Router (`src/router.py`):**
- `route_message` primește `adapter_name` keyword arg
- `_maybe_whatsapp_redirect` adaugă "💡 Pentru meniu interactiv folosește
  Discord sau Telegram" la mesajele de usage când adapter_name="whatsapp"
- WhatsApp `_handle_chat` pasează `adapter_name="whatsapp"`

**Tests:**
- `test_ralph_flow.py` — 10 teste (round-trip, isolation, expiry, atomic write)
- `test_router.py::TestRalphDispatch` — 3 teste (whatsapp redirect, discord
  no-redirect, usage message)

Foundation pentru W2 (planning agent — STEP_IN_PLANNING reservat).

Spike Step 0 PASS: skill subprocess + AskUserQuestion→text serialization
confirmat empiric (vezi tasks/spike-planning-findings.md).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/router.py

@@ -41,6 +41,7 @@ def route_message(
     text: str,
     model: str | None = None,
     on_text: Callable[[str], None] | None = None,
+    adapter_name: str | None = None,
 ) -> tuple[str, bool]:
     """Route an incoming message. Returns (response_text, is_command).
 
@@ -49,11 +50,14 @@ def route_message(
 
     *on_text* — optional callback invoked with each intermediate text block
     from Claude, enabling real-time streaming to the adapter.
+
+    *adapter_name* — "discord" / "telegram" / "whatsapp" / None. Used for
+    adapter-specific response shaping (e.g., redirect line on WhatsApp).
     """
     text = text.strip()
 
     # Ralph commands — short form (/p /a /l /k) and legacy aliases (!propose !approve !status !stop)
-    ralph_response = _try_ralph_dispatch(text)
+    ralph_response = _try_ralph_dispatch(text, adapter_name=adapter_name)
     if ralph_response is not None:
         return ralph_response, True
 
@@ -168,7 +172,19 @@ RALPH_CMDS = {
 }
 
 
-def _try_ralph_dispatch(text: str) -> str | None:
+_WHATSAPP_REDIRECT = (
+    "\n\n💡 Pentru meniu interactiv folosește Discord sau Telegram."
+)
+
+
+def _maybe_whatsapp_redirect(text: str, adapter_name: str | None) -> str:
+    """Append a redirect hint for WhatsApp users so they discover the rich UX."""
+    if adapter_name == "whatsapp":
+        return text + _WHATSAPP_REDIRECT
+    return text
+
+
+def _try_ralph_dispatch(text: str, adapter_name: str | None = None) -> str | None:
     """Parse and dispatch Ralph commands. Returns response string or None if no match."""
     low = text.lower()
     first = low.split(None, 1)[0] if low else ""
@@ -176,7 +192,10 @@ def _try_ralph_dispatch(text: str) -> str | None:
     if first in ("/p", "!propose"):
         parts = text.split(None, 2)
         if len(parts) < 3:
-            return "Folosire: /p <slug> <descriere>\nEx: /p roa2web Homepage redesign cu hero section"
+            return _maybe_whatsapp_redirect(
+                "Folosire: /p <slug> <descriere>\nEx: /p roa2web Homepage redesign cu hero section",
+                adapter_name,
+            )
         return _ralph_propose(parts[1].strip(), parts[2].strip())
 
     if first in ("/a", "!approve"):
@@ -189,7 +208,7 @@ def _try_ralph_dispatch(text: str) -> str | None:
     if first in ("/l", "!status"):
         parts = text.split(None, 1)
         filter_slug = parts[1].strip().lower() if len(parts) > 1 else None
-        return _ralph_status(filter_slug)
+        return _maybe_whatsapp_redirect(_ralph_status(filter_slug), adapter_name)
 
     if first in ("/k", "!stop"):
         parts = text.split(None, 1)