Add in-dashboard decision resolution with project log write

API:
- DecisionResolve schema (rationale, decided_by, write_log flag)
- POST /decisions/{id}/resolve — marks resolved, emits progress event,
  appends entry to DECISIONS.md in the project's registered directory
  (found via the topic's registration milestone event)

Dashboard:
- Replace Inputs.table for blocking decisions with full-text cards
- Each card shows title, full description (pre-wrap), rationale/context,
  escalation warning if present
- Expandable "Resolve →" section with rationale textarea, decided-by
  input, submit button that calls the resolve endpoint
- On success: collapses form, dims card, confirms log was written

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/schemas/decision.py

@@ -26,6 +26,12 @@ class DecisionCreate(BaseModel):
         return self
 
 
+class DecisionResolve(BaseModel):
+    rationale: str
+    decided_by: str
+    write_log: bool = True  # append to DECISIONS.md in the registered project directory
+
+
 class DecisionUpdate(BaseModel):
     title: str | None = None
     description: str | None = None