feat(capture): capture éclair — API à jeton dédié + écoute ntfy (issue #12)

POST /api/capture (X-Capture-Token ou Bearer; 503 si non configuré;
exempté Basic Auth/CSRF car machine-à-machine), JSON ou texte libre
(1re ligne = titre), dépôt par défaut KANBANTE_CAPTURE_REPO.
Module app/capture.py: parsing partagé + abonné ntfy en tâche de
fond (reconnexion, curseur kv_store anti-rejeu, tag 'kanban'...
'kanbante' ignoré). _do_capture commun: issue créée, carte placée,
événement 'created' source 'capture'.

app/config.py

@@ -36,6 +36,21 @@ Environment variables:
                                  the daily briefing is sent to ntfy.
                                  Empty (default) = no automatic send,
                                  the /briefing page stays available.
+    KANBANTE_CAPTURE_REPO        Default repo for quick capture
+                                 (POST /api/capture, the /capture page
+                                 and the ntfy capture listener), e.g.
+                                 "Projets/kanbante". Empty = captures
+                                 must name their repo explicitly.
+    KANBANTE_CAPTURE_TOKEN       Dedicated token for POST /api/capture
+                                 (header X-Capture-Token or Bearer).
+                                 Empty (default) = the endpoint is
+                                 disabled (503). Distinct from the
+                                 Gitea token; revocable on its own.
+    KANBANTE_CAPTURE_NTFY_TOPIC  ntfy topic listened to for captures:
+                                 each message published there becomes
+                                 an issue in KANBANTE_CAPTURE_REPO.
+                                 Uses KANBANTE_NTFY_URL/_TOKEN as the
+                                 server. Empty (default) = no listener.
 """
 
 import os
@@ -44,7 +59,7 @@ from pathlib import Path
 
 BASE_DIR = Path(__file__).resolve().parent.parent
 
-APP_VERSION = "0.6.0"
+APP_VERSION = "0.7.0"
 
 
 def _env_bool(name: str, default: bool) -> bool:
@@ -100,6 +115,9 @@ class Settings:
     ntfy_topic: str = ""
     ntfy_token: str = ""
     briefing_time: str = ""
+    capture_repo: str = ""
+    capture_token: str = ""
+    capture_ntfy_topic: str = ""
 
     @property
     def auth_enabled(self) -> bool:
@@ -129,4 +147,7 @@ def get_settings() -> Settings:
         ntfy_topic=os.getenv("KANBANTE_NTFY_TOPIC", ""),
         ntfy_token=os.getenv("KANBANTE_NTFY_TOKEN", ""),
         briefing_time=os.getenv("KANBANTE_BRIEFING_TIME", ""),
+        capture_repo=os.getenv("KANBANTE_CAPTURE_REPO", ""),
+        capture_token=os.getenv("KANBANTE_CAPTURE_TOKEN", ""),
+        capture_ntfy_topic=os.getenv("KANBANTE_CAPTURE_NTFY_TOPIC", ""),
     )