Merge branch 'fix-request-access': public account request flow

# Conflicts:
#	src/web/static/app.css

migrations/0007_account_requests.sql

@@ -0,0 +1,12 @@
+CREATE TABLE account_requests (
+    id           INTEGER PRIMARY KEY AUTOINCREMENT,
+    email        TEXT NOT NULL COLLATE NOCASE,
+    reason       TEXT,
+    status       TEXT NOT NULL CHECK (status IN ('open', 'done')) DEFAULT 'open',
+    requested_at TEXT NOT NULL,
+    handled_at   TEXT,
+    handled_by   INTEGER REFERENCES users(id) ON DELETE SET NULL
+);
+
+CREATE UNIQUE INDEX idx_account_requests_open_email
+    ON account_requests(email) WHERE status = 'open';