feat(cli)!: v0.10 reliability, agent-UX, and command-surface hardening

A hardening + finalization pass over the agent-first CLI: correctness fixes,
richer machine-readable signals, flag/naming consistency, and a symmetric
config surface. Pre-1.0, so it includes breaking renames.

Correctness:
- agent update: resolve/validate --model/--rerank-model (was storing a bogus
  name verbatim, corrupting config.model_id).
- doctor: honor WEKNORA_HOST / WEKNORA_API_KEY (headless path no longer reports
  "no host configured").
- session ask / MCP session_ask: text answer was empty on non-TTY — the agent
  stream sets Done=true on an intermediate agent_query frame before the answer,
  and AgentAccumulator treated the first Done as terminal. Terminate on the
  `complete` event (new sdk.AgentResponseTypeComplete), not a per-frame Done.
- batch exit codes: any per-item failure collapses to operation.failed (exit 1),
  including `doc upload --recursive` partial failures — a permanent per-file
  failure (e.g. a duplicate) no longer surfaces as a retryable exit 7 an agent
  would loop on; per-item typed errors stay in the envelope.

Agent-first signals & discovery:
- error.exit_code in the envelope (type + exit_code disambiguate the
  input.invalid_argument exit-2-vs-5 split in one JSON read).
- meta.hint on empty content search and on draft doc create; doc wait fails fast
  on a never-parsing draft instead of hanging to --timeout.
- retrieval-readiness is visible in the natural flow: kb status / kb check emit
  retrieval_ready, and kb create hints the fix when no embedding model is bound
  — an unconfigured KB no longer looks silently healthy.
- schema contract completeness: every leaf declares output + >=1 example
  (drift-guarded); output strings match the meta actually emitted; chunk list
  and search docs now emit meta.total_count (both previously dropped it).
- schema tolerates a quoted multi-word command label; zero-state auth — and
  `link` with no profile — point at profile setup / the headless WEKNORA_KB_ID
  path instead of looping on `auth login`.
- id-addressed reads tolerate a redundant --kb (doc view/wait, chunk list/view
  accept and ignore it, declared in schema) so a carried-over --kb doesn't
  exit 2; streaming commands warn that --jq does not apply to an NDJSON stream.
- keep JSON-always as the default; --jq hints spell out the .data path.

Consistency & gating:
- doc create: drop the deprecated --name alias (--title only; pre-1.0 break).
- chunk list --limit aligned to 1..10000; model list --limit/-L with
  has_more/total_count; api write-gates -X PUT/PATCH (exit 10); skills install
  expands a leading ~.
- docs corrected: search docs / doc list --keyword help is case-insensitive
  (server does LOWER LIKE); AGENTS.md risk-action list (no phantom kb.init; add
  model.update / kb.config.set) and batch example (failed item carries `error`);
  session resume --message id comes from `message list`, not the stream.
- auth/profile ergonomics: env credentials are now first-class — `auth token`
  prints the active WEKNORA_API_KEY / WEKNORA_TOKEN, and auth login/logout/refresh
  give an env-aware message instead of looping on "run auth login". `auth logout`
  clears credentials but keeps the profile registered (host preserved for
  re-login); deleting a profile is `profile remove`'s job (clean logout/remove
  separation, matching gh / lark).

Config surface (symmetric read/write, in-place model edits):
- kb config now returns a secret-free KBModelConfigView (was {}); `kb config`
  reads, new `kb config set` writes; `kb init` removed (misnomer).
- kb create --chat-model: retrieval-ready in one step.
- model update: edit a model in place (id preserved, references survive) —
  rotate --api-key-stdin, change base-url / display-name / etc.
- session continue-stream renamed to session resume.

Docs: AGENTS.md is the single wire-contract source; CHANGELOG slimmed; stale
kb-init / continue-stream references removed; skill wire-vocab guard extended.
AGENTS.md / weknora-shared SKILL document retrieval_ready (a KB needs an
embedding model to be searchable), that --jq does not apply to NDJSON
streams, and the env-credential-first auth path; the KB quickstart example
now creates a retrieval-ready KB.

cli/cmd/api/api.go

@@ -121,11 +121,21 @@ Examples:
 			}
 			method := resolveMethod(opts)
 			// Escape-hatch DELETE through `weknora api` is just as destructive
-			// as `weknora kb delete` - exit-10 protocol must apply (cli/README.md).
-			if method == http.MethodDelete {
+			// as `weknora kb delete` - exit-10 destructive protocol must apply
+			// (cli/README.md). PUT/PATCH mutate server state like a typed
+			// `kb/agent/doc update`, so they get the same exit-10 WRITE gate;
+			// without it the raw escape hatch bypassed the "an agent cannot
+			// silently mutate" guarantee. POST stays ungated to match typed
+			// `create` (also ungated). GET/HEAD are reads.
+			switch method {
+			case http.MethodDelete:
 				if err := cmdutil.ConfirmDestructive(f.Prompter(), opts.Yes, fopts.WantsJSON(), "delete", "endpoint", args[0], "api.delete", []string{"weknora", "api", "-X", "DELETE", args[0], "-y"}); err != nil {
 					return err
 				}
+			case http.MethodPut, http.MethodPatch:
+				if err := cmdutil.ConfirmWrite(f.Prompter(), opts.Yes, fopts.WantsJSON(), "write", "endpoint", args[0], "api."+strings.ToLower(method), apiRetryArgv(opts, method, args[0])); err != nil {
+					return err
+				}
 			}
 			cli, err := f.Client()
 			if err != nil {
@@ -154,7 +164,8 @@ Examples:
 		},
 		Output: "text mode (default): the raw server response body on stdout. json mode: the parsed server response is placed directly under envelope.data — project with --jq '.data...' at the server's own depth (e.g. '.data.data[]' for a list endpoint, '.data.data.id' for a created object). With --paginate, envelope.data is the merged {data, total}.",
 		Warnings: []string{
-			"Only -X DELETE is confirmation-gated (exit 10 / input.confirmation_required unless -y); -X GET/POST/PUT/PATCH and other methods are unguarded — you own the safety of writes made through this escape hatch.",
+			"-X DELETE is destructive-gated and -X PUT/PATCH are write-gated (exit 10 / input.confirmation_required unless -y), matching typed delete/update. -X POST (create-shaped) and GET are unguarded — you own the safety of creates made through this escape hatch.",
+			"Raw passthrough: the typed error envelope does NOT fully apply. The server's own response goes under envelope.data at its native depth; a non-2xx HTTP status surfaces via the exit code, not a typed error.type/retry_argv. Do not rely on error.type/retryable for `api` the way you do for typed subcommands.",
 			"Raw HTTP passthrough; agents should prefer typed subcommands (kb/doc/session/...) when available.",
 		},
 	})
@@ -293,6 +304,24 @@ func resolveMethod(opts *Options) string {
 	return "GET"
 }
 
+// apiRetryArgv reconstructs a directly-executable `weknora api` argv (with -y)
+// for the write-confirmation gate, preserving the method, path and body flags
+// the caller passed so an agent can re-run the exact mutation after approval.
+func apiRetryArgv(opts *Options, method, path string) []string {
+	argv := []string{"weknora", "api", "-X", method, path}
+	switch {
+	case opts.Data != "":
+		argv = append(argv, "-d", opts.Data)
+	case opts.Input != "":
+		argv = append(argv, "--input", opts.Input)
+	default:
+		for _, f := range opts.Fields {
+			argv = append(argv, "-F", f)
+		}
+	}
+	return append(argv, "-y")
+}
+
 // runAPI is the testable core: validate inputs, dispatch via Service.Raw,
 // classify status, and emit either the raw body or a JSON object. The
 // caller is responsible for resolving the method (defaults / auto-POST)