fix(#1894): fix alembic revision chain — rename 077→076 (no 076 existed), set down_revision to 075_add_sentence_timings, add postgresql dialect guard

KeyError: '076_membership_points' broke alembic upgrade on CI (Postgres).
No membership_points migration ever existed (PR #1919 added points
without a new alembic revision). Our migration should chain from
075_add_sentence_timings, the actual head on develop.

alembic/versions/076_merge_title_library_into_scripts.py

@@ -0,0 +1,68 @@
+"""#1894: merge title_library into scripts — add title_text/title_category/title_config to scripts
+
+Revision ID: 076_merge_title_library_into_scripts
+Revises: 075_add_sentence_timings
+Create Date: 2026-09-15
+"""
+
+import sqlalchemy as sa
+from alembic import context, op
+
+revision = "076_merge_title_library_into_scripts"
+down_revision = "075_add_sentence_timings"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # scripts 表新增标题配置三字段
+    with op.batch_alter_table("scripts") as batch:
+        batch.add_column(
+            sa.Column("title_text", sa.String(500), nullable=False, server_default=""),
+        )
+        batch.add_column(
+            sa.Column("title_category", sa.String(50), nullable=False, server_default=""),
+        )
+        batch.add_column(
+            sa.Column("title_config", sa.JSON, nullable=False, server_default="{}"),
+        )
+
+    # 从 title_libraries 迁移活跃数据到 scripts（仅 PostgreSQL；SQLite 下无历史数据）
+    if context.get_context().dialect.name == "postgresql":
+        conn = op.get_bind()
+        result = conn.execute(sa.text("SELECT to_regclass('public.title_libraries')"))
+        if result.scalar() is not None:
+            conn.execute(sa.text("""
+                    INSERT INTO scripts
+                        (id, user_id, title, content, segments, tags,
+                         title_text, title_category, title_config,
+                         created_at, updated_at)
+                    SELECT
+                        gen_random_uuid()::TEXT,
+                        tl.user_id,
+                        COALESCE(tl.name, '迁移标题'),
+                        COALESCE(tl.text, ''),
+                        '[]'::JSONB,
+                        COALESCE(tl.tags, '[]'::JSONB),
+                        COALESCE(tl.text, ''),
+                        COALESCE(tl.category, ''),
+                        COALESCE(tl."metadata", '{}'::JSONB),
+                        tl.created_at,
+                        tl.updated_at
+                    FROM title_libraries tl
+                    WHERE tl.is_active = true
+                      AND NOT EXISTS (
+                        SELECT 1 FROM scripts s
+                        WHERE s.user_id = tl.user_id
+                          AND s.title_text = COALESCE(tl.text, '')
+                          AND s.title_category = COALESCE(tl.category, '')
+                          AND s.created_at = tl.created_at
+                      )
+                """))
+
+
+def downgrade() -> None:
+    with op.batch_alter_table("scripts") as batch:
+        batch.drop_column("title_config")
+        batch.drop_column("title_category")
+        batch.drop_column("title_text")

alembic/versions/077_merge_title_library_into_scripts.py

@@ -1,64 +0,0 @@
-"""#1894: merge title_library into scripts — add title_text/title_category/title_config to scripts
-
-Revision ID: 077_merge_title_library_into_scripts
-Revises: 076_membership_points
-Create Date: 2026-09-15
-"""
-
-import sqlalchemy as sa
-from alembic import op
-
-revision = "077_merge_title_library_into_scripts"
-down_revision = "076_membership_points"
-branch_labels = None
-depends_on = None
-
-
-def upgrade() -> None:
-    # scripts 表新增标题配置三字段
-    with op.batch_alter_table("scripts") as batch:
-        batch.add_column(
-            sa.Column("title_text", sa.String(500), nullable=False, server_default=""),
-        )
-        batch.add_column(
-            sa.Column("title_category", sa.String(50), nullable=False, server_default=""),
-        )
-        batch.add_column(
-            sa.Column("title_config", sa.JSON, nullable=False, server_default="{}"),
-        )
-
-    # 从 title_libraries 迁移活跃数据到 scripts（若 title_libraries 表存在）
-    conn = op.get_bind()
-    exists = conn.execute(sa.text("SELECT to_regclass('public.title_libraries') IS NOT NULL")).scalar()
-    if exists:
-        conn.execute(sa.text("""
-            INSERT INTO scripts (id, user_id, title, content, segments, tags, title_text, title_category, title_config, created_at, updated_at)
-            SELECT
-                gen_random_uuid()::TEXT,
-                tl.user_id,
-                COALESCE(tl.name, '迁移标题'),
-                COALESCE(tl.text, ''),
-                '[]'::JSONB,
-                COALESCE(tl.tags, '[]'::JSONB),
-                COALESCE(tl.text, ''),
-                COALESCE(tl.category, ''),
-                COALESCE(tl."metadata", '{}'::JSONB),
-                tl.created_at,
-                tl.updated_at
-            FROM title_libraries tl
-            WHERE tl.is_active = true
-              AND NOT EXISTS (
-                SELECT 1 FROM scripts s
-                WHERE s.user_id = tl.user_id
-                  AND s.title_text = COALESCE(tl.text, '')
-                  AND s.title_category = COALESCE(tl.category, '')
-                  AND s.created_at = tl.created_at
-              )
-        """))
-
-
-def downgrade() -> None:
-    with op.batch_alter_table("scripts") as batch:
-        batch.drop_column("title_config")
-        batch.drop_column("title_category")
-        batch.drop_column("title_text")