feat(c7): dashboard widgets as plugin contributions + contact counts via contacts contract

app/plugins/builtins/calendar/plugin.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 
 from app.plugins.base import BasePlugin
 from app.plugins.manifest import (
+    FrontendDashboardWidget,
     FrontendDetailTab,
     FrontendMenuItem,
     FrontendPageRoute,
@@ -40,6 +41,18 @@ class CalendarPlugin(BasePlugin):
         ],
         events=[],
         migrations=["0001_initial.sql", "0002_add_deleted_at.sql"],
+        dashboard_widgets=[
+            FrontendDashboardWidget(
+                id="calendar_upcoming",
+                label_key="dashboard.calendarUpcoming",
+                label="Upcoming Appointments",
+                component="@/components/dashboard/CalendarUpcomingWidget",
+                icon="Calendar",
+                order=30,
+                col_span=1,
+                permission="calendar:read",
+            ),
+        ],
         permissions=[
             "calendar:read",
             "calendar:write",

app/plugins/builtins/contacts/contracts.py

@@ -0,0 +1,62 @@
+"""Public contract for the contacts plugin.
+
+Exposes the symbols that other core modules and plugins need without
+importing from internal modules directly (Block C7: dashboard counts).
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from sqlalchemy import func, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.visibility import apply_visibility_filter
+from app.models.contact import Contact
+from app.plugins.builtins.contracts import get_contract_registry
+
+
+class ContactsContract:
+    """Public API surface for the contacts plugin."""
+
+    contract_name = "contacts"
+
+    @staticmethod
+    async def get_counts(
+        db: AsyncSession,
+        tenant_id: Any,
+        user_id: Any,
+        is_system_admin: bool = False,
+    ) -> dict[str, int]:
+        """Return visibility-filtered contact/company/person counts."""
+        queries = []
+        for type_filter in (None, "company", "person"):
+            query = select(func.count(Contact.id)).where(
+                Contact.tenant_id == tenant_id,
+                Contact.deleted_at.is_(None),
+            )
+            if type_filter is not None:
+                query = query.where(Contact.type == type_filter)
+            query = await apply_visibility_filter(
+                db, query, "contact", Contact, user_id, tenant_id, is_system_admin
+            )
+            queries.append(query)
+
+        results = [((await db.execute(q)).scalar() or 0) for q in queries]
+        return {
+            "contacts": results[0],
+            "companies": results[1],
+            "persons": results[2],
+            "total": results[0],
+        }
+
+    @classmethod
+    def get_function(cls, name: str):
+        """Return a callable exposed by this contract, or None if absent."""
+        return getattr(cls, name, None)
+
+
+# ─── self-registration ───
+
+_contract = ContactsContract()
+get_contract_registry().register("contacts", _contract)

app/plugins/builtins/contacts/plugin.py

@@ -9,7 +9,11 @@ from __future__ import annotations
 import logging
 
 from app.plugins.base import BasePlugin
-from app.plugins.manifest import PluginManifest, PluginRouteDef
+from app.plugins.manifest import (
+    FrontendDashboardWidget,
+    PluginManifest,
+    PluginRouteDef,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -54,6 +58,18 @@ class ContactsPlugin(BasePlugin):
         ],
         events=[],
         migrations=[],
+        dashboard_widgets=[
+            FrontendDashboardWidget(
+                id="recent_contacts",
+                label_key="dashboard.recentContacts",
+                label="Recent Contacts",
+                component="@/components/dashboard/RecentContactsWidget",
+                icon="Users",
+                order=10,
+                col_span=2,
+                permission="contacts:read",
+            ),
+        ],
         permissions=[
             "contacts:read",
             "contacts:write",

app/plugins/builtins/tasks/plugin.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 from app.plugins.base import BasePlugin
 from app.plugins.manifest import (
     CronJobContribution,
+    FrontendDashboardWidget,
     FrontendMenuItem,
     FrontendPageRoute,
     PluginManifest,
@@ -30,6 +31,18 @@ class TasksPlugin(BasePlugin):
         ],
         events=[],
         migrations=["0001_initial.sql", "0002_unified_task_system.sql"],
+        dashboard_widgets=[
+            FrontendDashboardWidget(
+                id="tasks_summary",
+                label_key="dashboard.tasksSummary",
+                label="Tasks Summary",
+                component="@/components/dashboard/TasksSummaryWidget",
+                icon="CheckSquare",
+                order=20,
+                col_span=1,
+                permission="tasks:read",
+            ),
+        ],
         permissions=[
             "tasks:read",
             "tasks:write",

app/routes/dashboard.py

@@ -5,13 +5,11 @@ from __future__ import annotations
 import uuid
 
 from fastapi import APIRouter, Depends
-from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.core.db import get_db
-from app.core.visibility import apply_visibility_filter
 from app.deps import require_permission
-from app.models.contact import Contact
+from app.plugins.builtins.contracts import get_contract
 from app.plugins.registry import get_registry
 
 router = APIRouter(prefix="/api/v1/dashboard", tags=["dashboard"])
@@ -50,51 +48,16 @@ async def get_dashboard_counts(
 ):
     """Get dashboard count statistics filtered by user visibility.
 
-    Returns counts for contacts and companies that the current user
-    is allowed to see based on ownership and sharing permissions.
+    Counts come from the contacts plugin contract (Block C7) — the core
+    dashboard route has no direct dependency on the Contact model.
     """
-    tenant_id = uuid.UUID(current_user["tenant_id"])
-    user_id = uuid.UUID(current_user["user_id"])
-    is_system_admin = current_user.get("is_system_admin", False)
+    contacts_contract = get_contract("contacts")
+    if contacts_contract is None or not hasattr(contacts_contract, "get_counts"):
+        return {"contacts": 0, "companies": 0, "persons": 0, "total": 0}
 
-    # Contact count with visibility filter
-    contact_query = select(func.count(Contact.id)).where(
-        Contact.tenant_id == tenant_id,
-        Contact.deleted_at.is_(None),
+    return await contacts_contract.get_counts(
+        db=db,
+        tenant_id=uuid.UUID(current_user["tenant_id"]),
+        user_id=uuid.UUID(current_user["user_id"]),
+        is_system_admin=current_user.get("is_system_admin", False),
     )
-    contact_query = await apply_visibility_filter(
-        db, contact_query, "contact", Contact, user_id, tenant_id, is_system_admin
-    )
-    contact_result = await db.execute(contact_query)
-    contact_count = contact_result.scalar() or 0
-
-    # Company count (Contact.type == 'company') with visibility filter
-    company_query = select(func.count(Contact.id)).where(
-        Contact.tenant_id == tenant_id,
-        Contact.deleted_at.is_(None),
-        Contact.type == "company",
-    )
-    company_query = await apply_visibility_filter(
-        db, company_query, "contact", Contact, user_id, tenant_id, is_system_admin
-    )
-    company_result = await db.execute(company_query)
-    company_count = company_result.scalar() or 0
-
-    # Person count (Contact.type == 'person') with visibility filter
-    person_query = select(func.count(Contact.id)).where(
-        Contact.tenant_id == tenant_id,
-        Contact.deleted_at.is_(None),
-        Contact.type == "person",
-    )
-    person_query = await apply_visibility_filter(
-        db, person_query, "contact", Contact, user_id, tenant_id, is_system_admin
-    )
-    person_result = await db.execute(person_query)
-    person_count = person_result.scalar() or 0
-
-    return {
-        "contacts": contact_count,
-        "companies": company_count,
-        "persons": person_count,
-        "total": contact_count,
-    }