fix(security): RBAC on legacy create endpoints, hashed API keys, hardening

Addresses findings from the security audit:
- H1: add check_project_role to the legacy misc.py create endpoints
  (milestones=mgr, tasks/supports/meetings=dev) that previously required
  only authentication — closing a cross-project write bypass available to
  any logged-in user or agent API key.
- M2: comments are always attributed to the authenticated caller; the
  client-supplied author_id is dropped (no author spoofing).
- M3: API keys are stored as SHA-256 hashes (key_hash) plus a short
  key_prefix for display — never plaintext. Lookup hashes the presented
  key; listings never expose the secret. Includes an idempotent migration
  for existing deployments.
- M5: the OIDC session cookie's Secure flag is env-driven via
  SESSION_COOKIE_SECURE (default True; set false for plain-HTTP dev).

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

app/api/routers/misc.py

@@ -12,7 +12,7 @@ from sqlalchemy import func as sqlfunc
 from pydantic import BaseModel
 
 from app.core.config import get_db
-from app.api.deps import get_current_user_or_apikey, require_admin
+from app.api.deps import get_current_user_or_apikey, require_admin, hash_api_key
 from app.api.rbac import check_project_role, ensure_can_edit_milestone
 from app.models import models
 from app.models.apikey import APIKey
@@ -49,7 +49,8 @@ class APIKeyCreate(BaseModel):
 
 class APIKeyResponse(BaseModel):
     id: int
-    key: str
+    key: str | None = None        # full secret — only populated on create/reset
+    key_prefix: str | None = None # masked display for listings
     name: str
     user_id: int
     is_active: bool
@@ -66,11 +67,16 @@ def create_api_key(data: APIKeyCreate, db: Session = Depends(get_db),
     if not user:
         raise HTTPException(status_code=404, detail="User not found")
     key = secrets.token_hex(32)
-    db_key = APIKey(key=key, name=data.name, user_id=data.user_id)
+    db_key = APIKey(key_hash=hash_api_key(key), key_prefix=key[:8], name=data.name, user_id=data.user_id)
     db.add(db_key)
     db.commit()
     db.refresh(db_key)
-    return db_key
+    # Return the raw key once (it is never stored or shown again).
+    return {
+        "id": db_key.id, "key": key, "key_prefix": db_key.key_prefix,
+        "name": db_key.name, "user_id": db_key.user_id, "is_active": db_key.is_active,
+        "created_at": db_key.created_at, "last_used_at": db_key.last_used_at,
+    }
 
 
 @router.get("/api-keys", response_model=List[APIKeyResponse], tags=["API Keys"])
@@ -80,11 +86,14 @@ def list_api_keys(user_id: int = None, db: Session = Depends(get_db),
     if user_id:
         query = query.filter(APIKey.user_id == user_id)
     keys = query.all()
-    # Never expose the full secret on listing; show only a masked prefix.
-    for k in keys:
-        if k.key and len(k.key) > 8:
-            k.key = k.key[:6] + "…" + k.key[-2:]
-    return keys
+    # Never expose the secret on listing — the raw key isn't stored. Show only
+    # the masked prefix.
+    return [{
+        "id": k.id, "key": None,
+        "key_prefix": (k.key_prefix + "…") if k.key_prefix else None,
+        "name": k.name, "user_id": k.user_id, "is_active": k.is_active,
+        "created_at": k.created_at, "last_used_at": k.last_used_at,
+    } for k in keys]
 
 
 @router.delete("/api-keys/{key_id}", status_code=status.HTTP_204_NO_CONTENT, tags=["API Keys"])
@@ -132,7 +141,10 @@ def list_activity(entity_type: str = None, entity_id: int = None, user_id: int =
 def create_milestone(ms: schemas.MilestoneCreate, db: Session = Depends(get_db), current_user: models.User = Depends(get_current_user_or_apikey)):
     import json
     project = db.query(models.Project).filter(models.Project.id == ms.project_id).first()
-    project_code = project.project_code if project and project.project_code else f"P{ms.project_id}"
+    if not project:
+        raise HTTPException(status_code=404, detail="Project not found")
+    check_project_role(db, current_user.id, project.id, min_role="mgr")
+    project_code = project.project_code if project.project_code else f"P{ms.project_id}"
     
     max_ms = db.query(MilestoneModel).filter(MilestoneModel.project_id == ms.project_id).order_by(MilestoneModel.id.desc()).first()
     next_num = (max_ms.id + 1) if max_ms else 1
@@ -488,14 +500,15 @@ def create_milestone_task(project_code: str, milestone_id: str, task_data: dict,
     project = db.query(models.Project).filter(models.Project.project_code == project_code).first()
     if not project:
         raise HTTPException(status_code=404, detail="Project not found")
-    
+    check_project_role(db, current_user.id, project.id, min_role="dev")
+
     ms = db.query(MilestoneModel).filter(MilestoneModel.milestone_code == milestone_id, MilestoneModel.project_id == project.id).first()
     if not ms:
         raise HTTPException(status_code=404, detail="Milestone not found")
-    
+
     if ms.status and hasattr(ms.status, "value") and ms.status.value == "undergoing":
         raise HTTPException(status_code=400, detail="Cannot add items to a milestone that is undergoing")
-    
+
     milestone_code = ms.milestone_code or f"m{ms.id}"
     max_task = db.query(Task).filter(Task.milestone_id == ms.id).order_by(Task.id.desc()).first()
     next_num = (max_task.id + 1) if max_task else 1
@@ -622,6 +635,7 @@ def create_support(project_code: str, milestone_id: str, support_data: dict, db:
     project = db.query(models.Project).filter(models.Project.project_code == project_code).first()
     if not project:
         raise HTTPException(status_code=404, detail="Project not found")
+    check_project_role(db, current_user.id, project.id, min_role="dev")
 
     ms = db.query(MilestoneModel).filter(MilestoneModel.milestone_code == milestone_id, MilestoneModel.project_id == project.id).first()
     if not ms:
@@ -768,14 +782,15 @@ def create_meeting(project_code: str, milestone_id: str, meeting_data: dict, db:
     project = db.query(models.Project).filter(models.Project.project_code == project_code).first()
     if not project:
         raise HTTPException(status_code=404, detail="Project not found")
-    
+    check_project_role(db, current_user.id, project.id, min_role="dev")
+
     ms = db.query(MilestoneModel).filter(MilestoneModel.milestone_code == milestone_id, MilestoneModel.project_id == project.id).first()
     if not ms:
         raise HTTPException(status_code=404, detail="Milestone not found")
-    
+
     if ms.status and hasattr(ms.status, "value") and ms.status.value == "undergoing":
         raise HTTPException(status_code=400, detail="Cannot add items to a milestone that is undergoing")
-    
+
     milestone_code = ms.milestone_code or f"m{ms.id}"
     max_meeting = db.query(Meeting).filter(Meeting.milestone_id == ms.id).order_by(Meeting.id.desc()).first()
     next_num = (max_meeting.id + 1) if max_meeting else 1