feat(chats,auth,provider-connections): close P3 of #11 + extract dispatchWrite

[dgilperez]

Closes the remaining read+chat surface flagged in #11 (P3), plus a small refactor that retires the dry-run-or-execute boilerplate across the codebase.

New commands

Endpoint	Command
GET /api/v1/provider_connections	provider-connections list
GET /api/v1/chats	chats list [--page] (upstream fixed 20/page)
GET /api/v1/chats/:id	chats show <id> [--page] (messages 50/page)
POST /api/v1/chats	chats create --title --message --model [--apply]
PATCH /api/v1/chats/:id	chats update <id> --title [--apply]
DELETE /api/v1/chats/:id	chats delete <id> [--apply]
POST /api/v1/chats/:chat_id/messages	chats messages create --chat-id --content --model [--apply]
POST /api/v1/chats/:chat_id/messages/retry	chats messages retry --chat-id [--apply]
PATCH /api/v1/auth/enable_ai	auth enable-ai [--apply]

Refactor — dispatchWrite

Pulled the repeated if !apply { printDryRun(method, path, body); return }; printX(path, ...) pattern into a single dispatchWrite(apply, method, path, body) helper next to printDryRun in reference_cmds.go. Migrated:

• All 5 chats write sites
• The 1 auth write site
• The 3 existing tags create/update/delete sites

The investment / financial / users / family-export print*DryRun variants are intentionally left alone — they wrap their own per-context print helpers and consolidating them across contexts is a separate cleanup.

Unsupported HTTP methods now fail loudly via output.Fail rather than silently no-oping.

TDD notes

• Tests-first for every new command (shape, registration, flag set).
• Per-builder unit tests for buildChatCreateBody, buildChatUpdateBody, buildMessageCreateBody, validateMessageRetryOpts covering required + optional fields and whitespace-only titles (matches upstream validates :title, presence: true).
• Explicit guard: chats list must NOT expose --per-page (upstream uses a fixed page size).
• TestDispatchWrite_DryRun_POST / _DryRun_DELETE_OmitsNilBody capture stdout via os.Pipe and parse the JSON envelope to lock in the dry-run shape.
• Tightened Find-based registration tests across chats / auth / provider-connections — cobra's Find silently returns the nearest matching ancestor when a leaf is missing, so the tests now compare resolved cmd Name() to the expected leaf.

go test ./... green across the suite.

Refs #11.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 8a9faa52-d77f-4c4e-b4de-165ad628d06b

📥 Commits

Reviewing files that changed from the base of the PR and between 90ee7c0 and 58576bf.

📒 Files selected for processing (11)

• README.md
• cmd/sure-cli/root/auth_cmd.go
• cmd/sure-cli/root/auth_cmd_test.go
• cmd/sure-cli/root/chats_cmd.go
• cmd/sure-cli/root/chats_cmd_test.go
• cmd/sure-cli/root/dispatch_write_test.go
• cmd/sure-cli/root/provider_connections_cmd.go
• cmd/sure-cli/root/provider_connections_cmd_test.go
• cmd/sure-cli/root/reference_cmds.go
• cmd/sure-cli/root/root.go
• docs/ROADMAP.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/cli-chats-auth-provider

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