Fix BASE_URL config loading, add tasks/projects; robust .env path resolution

- Config: try ENV_FILE, .env, ../.env for loading; trim trailing slash from BaseURL
- Log BASE_URL at server startup for verification
- .env.example: document BASE_URL
- Tasks, projects, tags, migrations and related API/handlers

Made-with: Cursor

sqlc/schema.sql

@@ -197,3 +197,112 @@ CREATE TABLE calendar_subscriptions (
 );
 
 CREATE INDEX idx_calendar_subscriptions_calendar_id ON calendar_subscriptions (calendar_id);
+
+-- Projects (Layer 2)
+CREATE TABLE projects (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    owner_id UUID NOT NULL REFERENCES users(id),
+    name TEXT NOT NULL,
+    color TEXT NOT NULL DEFAULT '#3B82F6',
+    is_shared BOOLEAN NOT NULL DEFAULT false,
+    deadline TIMESTAMPTZ,
+    sort_order INTEGER NOT NULL DEFAULT 0,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
+);
+
+CREATE INDEX idx_projects_owner_id ON projects (owner_id);
+
+-- Project Members (Layer 2 shared projects)
+CREATE TABLE project_members (
+    project_id UUID NOT NULL REFERENCES projects(id),
+    user_id UUID NOT NULL REFERENCES users(id),
+    role TEXT NOT NULL CHECK (role IN ('owner', 'editor', 'viewer')),
+    PRIMARY KEY (project_id, user_id)
+);
+
+CREATE INDEX idx_project_members_project_id ON project_members (project_id);
+
+-- Tags (Layer 2)
+CREATE TABLE tags (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    owner_id UUID NOT NULL REFERENCES users(id),
+    name TEXT NOT NULL,
+    color TEXT NOT NULL DEFAULT '#6B7280',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX idx_tags_owner_id ON tags (owner_id);
+
+-- Tasks (Layer 1 core)
+CREATE TABLE tasks (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    owner_id UUID NOT NULL REFERENCES users(id),
+    title TEXT NOT NULL,
+    description TEXT,
+    status TEXT NOT NULL DEFAULT 'todo' CHECK (status IN ('todo', 'in_progress', 'done', 'archived')),
+    priority TEXT NOT NULL DEFAULT 'medium' CHECK (priority IN ('low', 'medium', 'high', 'critical')),
+    due_date TIMESTAMPTZ,
+    completed_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ,
+    project_id UUID REFERENCES projects(id),
+    parent_id UUID REFERENCES tasks(id),
+    sort_order INTEGER NOT NULL DEFAULT 0,
+    recurrence_rule TEXT
+);
+
+CREATE INDEX idx_tasks_owner_id ON tasks (owner_id);
+CREATE INDEX idx_tasks_status ON tasks (owner_id, status) WHERE deleted_at IS NULL;
+CREATE INDEX idx_tasks_priority ON tasks (owner_id, priority) WHERE deleted_at IS NULL;
+CREATE INDEX idx_tasks_due_date ON tasks (owner_id, due_date) WHERE deleted_at IS NULL;
+CREATE INDEX idx_tasks_project_id ON tasks (project_id) WHERE deleted_at IS NULL;
+CREATE INDEX idx_tasks_parent_id ON tasks (parent_id) WHERE deleted_at IS NULL;
+
+-- Task Tags (many-to-many)
+CREATE TABLE task_tags (
+    task_id UUID NOT NULL REFERENCES tasks(id),
+    tag_id UUID NOT NULL REFERENCES tags(id),
+    PRIMARY KEY (task_id, tag_id)
+);
+
+CREATE INDEX idx_task_tags_task_id ON task_tags (task_id);
+CREATE INDEX idx_task_tags_tag_id ON task_tags (tag_id);
+
+-- Task Dependencies (Layer 3)
+CREATE TABLE task_dependencies (
+    task_id UUID NOT NULL REFERENCES tasks(id),
+    blocks_task_id UUID NOT NULL REFERENCES tasks(id),
+    PRIMARY KEY (task_id, blocks_task_id),
+    CHECK (task_id != blocks_task_id)
+);
+
+CREATE INDEX idx_task_dependencies_task_id ON task_dependencies (task_id);
+CREATE INDEX idx_task_dependencies_blocks ON task_dependencies (blocks_task_id);
+
+-- Task Reminders (Layer 2)
+CREATE TABLE task_reminders (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    task_id UUID NOT NULL REFERENCES tasks(id),
+    type TEXT NOT NULL CHECK (type IN ('push', 'email', 'webhook', 'telegram', 'nostr')),
+    config JSONB NOT NULL DEFAULT '{}',
+    scheduled_at TIMESTAMPTZ NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX idx_task_reminders_task_id ON task_reminders (task_id);
+CREATE INDEX idx_task_reminders_scheduled ON task_reminders (scheduled_at);
+
+-- Task Webhooks (Layer 3)
+CREATE TABLE task_webhooks (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    owner_id UUID NOT NULL REFERENCES users(id),
+    url TEXT NOT NULL,
+    events JSONB NOT NULL DEFAULT '[]',
+    secret TEXT,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX idx_task_webhooks_owner_id ON task_webhooks (owner_id);