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/adapters/discord_bot.py

@@ -24,6 +24,7 @@ from src.router import (
     _ralph_stop,
     _load_approved_tasks,
 )
+from src.adapters.discord_views import RalphRootView
 
 logger = logging.getLogger("echo-core.discord")
 _security_log = logging.getLogger("echo-core.security")
@@ -933,8 +934,28 @@ def create_bot(config: Config) -> discord.Client:
     ) -> list[app_commands.Choice[str]]:
         return await _autocomplete_by_status(interaction, current, ("running", "approved"))
 
+    async def _ralph_autocomplete_workspace(
+        interaction: discord.Interaction, current: str
+    ) -> list[app_commands.Choice[str]]:
+        from pathlib import Path
+        ws = Path("/home/moltbot/workspace")
+        if not ws.exists():
+            return []
+        current_low = (current or "").lower()
+        choices: list[app_commands.Choice[str]] = []
+        for p in sorted(ws.iterdir()):
+            if not p.is_dir() or p.name.startswith("."):
+                continue
+            if current_low and current_low not in p.name.lower():
+                continue
+            choices.append(app_commands.Choice(name=p.name, value=p.name))
+            if len(choices) >= 25:
+                break
+        return choices
+
     @tree.command(name="p", description="Propose new Ralph project")
     @app_commands.describe(slug="Project slug (e.g. game-library)", description="Short description of what to do")
+    @app_commands.autocomplete(slug=_ralph_autocomplete_workspace)
     async def ralph_p(
         interaction: discord.Interaction, slug: str, description: str
     ) -> None:
@@ -949,9 +970,12 @@ def create_bot(config: Config) -> discord.Client:
         slugs = [slug] if slug else []
         await interaction.response.send_message(_ralph_approve(slugs))
 
-    @tree.command(name="l", description="List Ralph projects status")
+    @tree.command(name="l", description="List Ralph projects (interactive)")
     async def ralph_l(interaction: discord.Interaction) -> None:
-        await interaction.response.send_message(_ralph_status())
+        view = RalphRootView()
+        await interaction.response.send_message(
+            view.render_summary(), view=view, ephemeral=True
+        )
 
     @tree.command(name="k", description="Stop a running Ralph project")
     @app_commands.describe(slug="Project slug to stop")